GM 5.3 engine problems

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  3. The GM 5.3-Liter Engine Problems & The Class Action Lawsuit Back in December of 2019, the GM 5.3-liter engine had so many issues that a class action lawsuit was filed. According to CarComplaints.com, the lawsuit alleges the Generation IV Vortec 5300 engines burn too much oil in these vehicles

The most commonly reported problem for the Chevrolet 5.3L V8 engine is that there is excessive oil consumption from them. This is caused by the Chevrolet Active Fuel Management system that can cause the vehicle to use 1 quart of oil for every 1,500 miles it drives According to suits filed against the company, the GM 5.3 engine has several flaws. The most recent suit, filed in 2020, alleges that the engines use unusually high amounts of oil that lead to fouling of other parts of the engine Chevy 5.3 engine problems is something owners complaining constantly about. Over the years, V8 engines have continued to impress thousands of customers with their smoothness and operation. They're reasonable when it comes to fuel economy and still hold enough power to take you on an adventure anywhere

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  1. Chevy EcoTec3 5.3L Engine Problems After a strong 30+ year run for the Chevy Vortec engine family, the Vortec was replaced with the new EcoTec3 engine line. Plagued by oil consumption issues and active fuel management problems, the Vortec engines were retired in 2013
  2. The 5.3L Chevy is one of such brands that has faced a major problem with regards to its engine, and various owners in different locations complain of the same thing - the engine. With the rate of engine problems arising from the Chevrolet, it becomes even harder to trust the brand
  3. One of the most prevalent issues on the Vortec 5300 engine occured in Gen IV engines from model year 2010 to 2014. These 5.3 vortec's are prone to excessive oil consumption, significantly above standard oil consumption levels. Excessive oil consumption is thought to be caused by the Active Fuel Management or AFM system
  4. The 5.3 and it's predecessor, the 4.8, are essentially 400k engines that GM ruined through the addition of AFM. I own an '09 Avalanche with 350k miles that's spent the last 4 years regularly.

5.3 Liter Chevy Engine Problems ️ Everything You Need To Kno

In this video we talk about the biggest issue with GMC's 5.3L engines and what you can do to fix this common issue! Let me know in the comments if you've had.. Misfire Due to Collapsed Lifter February 10, 2021 Some 2019-2021 Silverado, Sierra; 2021 Tahoe, Suburban, Yukon and Escalade models equipped with the 5.3L V8 engine (RPO L84) or 6.2L V8 engine (RPO L87) may have a misfire condition with a bent pushrod that leads to a collapsed lifter or the lifter comes apart — Jan 11, 2021 Yet another class action lawsuit has been filed against General Motors over alleged oil consumption issues with the Generation IV 5.3L Vortec V8 engine that was offered in a variety.. Engine problems due to fouled or damaged valves, which can be caused by the excessive oil consumption issue A 5.3L V8 engine in a 2006 Chevy Impala SS, via Wikimedia Commons Now, to be fair: Not every GM 5.3L V8 has problems with AFM. Many consumers report a trouble-free ownership experience Presence Of A Ticking Noise or/and Misfires This is a common 5.3 liter Chevy engine problem reoccurring mostly in cylinders 1,4,6 and 7 of General Motors 2005-2014 models of it. The cause of this problem is usually an active fuel management (AFM) lifter. The ticking noise problem occurs when the AFM lifter is mechanically broken or stuck

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The 5.3's AFM problems were likely cured in post 1/11 production when the cumulative modifications included, new valve cover to reduce oil suction on the PCV takeoff, AFM valve shield to direct sump discharge away from the cylinder wall, and redesigned hydraulic lifters When Problems regarding Chevy 5.3L engines, GM states a limited amount of air will leak from the bleed holes and outlets ports. Even when the solenoids are off, compare the amount of leakage to verify all 4 solenoids are operating the same. If it isolates a concern with the VLOM, replace it and reevaluate the concern. 3 Chevy 5.3 L engines produced from 1999 to 2006 we're going to have problems with a fuel pressure regulator failing. This caused the fuel and air ratio to be thrown off in a way that would limit the truck's performance 10/23/16 5:32 a.m. secretariata wrote: I seem to recall several members here have had problems with early AFM trucks/SUVs requiring new engines at relatively low miles (75k-125k). They don't need new engines, some dealerships would rather replace a whole engine than pull the heads off and replace the lifters, for whatever reason they have So the other day while doing such task I became curious about the repair history of our 2014-2018 GM trucks equipped with the EcoTec3 5.3. Currently in our fleet we have 210 trucks meeting that criteria. 95% of them are double cab Chevrolet Silverado 4x4's with the remaining 5% being GMC Sierra's of various configurations

5.3-liter Chevy Engine Problems: What Should You Look Out ..

The GM 5.3L EcoTec3 is a 5.3-liter V8 naturally-aspirated engine with a direct fuel injection system. The debuted in 2014, the EcoTec3 5.3 V8 is the fifth generation of small block V8 truck engines, which replaced the previous Gen4 predecessor - Vortec 5300 With Ford, the problem is there, but it's not destroying the engine like it is with GM, he says. That might be because Ford ran the V6 EcoBoost engines through the Baja 1000 and they essentially beat the crap out of them and I think they put a little bit more engineering into the engine, so it's able to shrug off these issues a. GMC dealer diagnosed the problem as a failed lifter, which, apparently, has been a common problem in GM 5.3L engines. A vehicle should not need a new engine, or even new lifters for that matter. GMC Sierra 1500 vs. Chevy Silverado 1500. Which GM V8 engine is best in a pickup truck? Is it the 5.3L or the 6.2L EcoTec3 V8 engine? We recently received this question from Abe H at ask@tfltruck.

This problem is apparent in more than 600,000 vehicles, leaving many people at-risk. If GMC was in command, these types of defects would never occur. Problems with the Engine. The engine of a truck is what creates the power needed to haul and tow. With GMC, the engine simply wasn't created to handle all of the jobs customers have That's not the end of the 5.3 Chevy engine problems, unfortunately. We all know how important engine maintenance is to long-term vehicle health. If the 5.3-liter engine doesn't receive oil changes on time, sludge can quickly build up on internal components. This sludge is a gooey, sticky black tarlike substance that plugs everything up GM LS AFM Deactivation Lifter Issues We have noticed an increase in the issues surrounding the replacement of deactivation lifters in GM LS engines with Active Fuel Management or AFM. After installing new lifters the original issue may not have been corrected. Most lifters returned for analysis are found to be good GMC 5.3 Engine problems. dk55403. Participant. Posts: 29. August 9, 2020 at 12:25 pm #1963664. I am getting a check engine light on my 2017 GMC Sierra 1500. Brought it to a GM certified shop and they said that my injectors are bad and need to be replaced. That said the truck has only 55,000 mile on it and is still under power train warranty. 08 silvy. ·. Registered. Joined Feb 13, 2011. ·. 82 Posts. #8 · Jun 11, 2013. You need to remove your intake tube and look into the throttle body and tr and see if oil is puddled in the intake. I know on the 07 and newer they have a new valve cover to help with this problem because the oil gets sucked into the intake

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1 was when the 5.3 first came out they were using more oil than they should have. That was fixed around 02-03 2. the cylinder deactivation stuff should be avoided if you can but pretty much any GM V8 with an auto trans has it 5.3 L Missing and Rough Idle Intermittently. I have changed Spark Plugs,Wires ,Coil Packs, and removed Fuel Injectors and soaked overnight. Engine code is a P0304. Misfire Cylinder #4. Most of the time around town is alright. When i put it on highway, it will surge like its cutting off and then pick right back up and be fine The first production 5.3-liter Chevy V8 (Vortec 5300) is found in various vehicles from 1999 to 2007. This includes, but is not limited to, the likes of the Chevy Silverado, Avalanche, and GMC Sierra pickup trucks. Furthermore, Yukon, Tahoe, and Suburban SUVs are also equipped with the 5.3. Finally, the engine can also be found in Chevy Express. The 6.0 or 6.2 is by far the better engine in a half ton pickup. No question. BUT it cost more money and the 5.3 is proven in the half-ton platform. Lots of guys love their 4.8's too. I like GM V8's no matter what size they are! tradersbayrookie. Participant. Posts: 86. February 13, 2019 at 2:34 pm #1835166

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Mar 10, 2021. #2. 2015 Silverado - 5.3L at 85k, lifter stuck open coming home pulling a trailer, started backfiring through the intake manifold. Was able to limp it home. 2015 was the last year for full 5yr/100k warranty I believe. Had the dealer rebuild the engine from the Cam up. Dealer charged $3600 in parts back to corporate, cost me. Upper Engine and Fuel Injector Cleaner, GM P/N88861803 (in Canada, use 88861804), in each cylinder. Allow the material to soak for at least 2.5-3.0 hours, but no more than three hours and then remove the cleaner. A suggested method of removing the cleaner is cranking the engine over. Make sure to unplug the ignition coils and fue According to CarComplaints.com, owners claim the fourth-generation Vortec engine was engineered with defective piston rings, causing oil consumption problems and even the possibility of an engine fire. The engine in question is the 5.3-liter Vortec in the following GM models: 2010-2014 Chevrolet Avalanche; 2010-2013 Chevrolet Silverad A GM 5.3L engine oil consumption lawsuit alleges numerous 2010-2013 General Motors trucks and SUVs suffer from defects that allow oil to enter the combustion chambers of the 5.3-Liter V8 Vortec 5300 engines

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Silverado and Sierra models equipped with the 5.3-liter V8 will not sport GM's Dynamic Fuel Management tech for the 2021 model year. Sean Szymkowski March 15, 2021 8:50 a.m. P Chevy Silverado and GMC Sierra Gasoline Engine Problems I have a '02 Chevy 1500 5.3 liter with 55k miles. I put on a K&N air filter and tornado about 3 years ago and was consistanty getting 17.5+ mpg. During the last 7 months, mpg has been steadlily, consistantly going down. My last tank was 13.5 mpg for the same kind of driving as usual

Engine Misfire or Rough Engine Idle on GM 4.8L, 5.3L, 6.0L is becoming; more common and getting harder to diagnose. Because, GM V8 engines are very prone to a rough idle and engine misfire when cold. The check engine light may also come on, with codes P0300, P0171 and PO174 Unfortunately because of emission standards nowadays, manufacturers cant go back to those style of engines. So for all of you that continue to complain about how bad these things are. Change your oil. Because it's not just GM that have engine problems. It's Chrysler and Ford. I have a 2014 Silverado with a 5-3 The 4.8 L and 5.3 L are two top quality small block engines from General Motors. We will do a comprehensive review of the two engines, 4.8 vs 5.3. The 4.8 and 5.3 were designed to take the place of truck engines 305 and 350. The 4.8 L and 5.3 L look-alike in several ways, such as their engine blockheads and architecture engine for at least 5 to 7 minutes, release the vehicle back to the customer. 2. Drive the vehicle through the DFM modes. 3. Check for any misfire DTCs and record: • If DTCs are found, refer to SI for diagnosis. • If no DTCs are found and noise still persists, operate the engine through cylinder Deactivation test to isolate the cylinder. What 5.3 liter chevy engine is infamous for is its immense oil consumption. Since there are not many engines out there with the capacity to spend the amount of oil that is spent on this particular engine, it is reasonable to find out what causes unnatural consumption. In most of the cases, the problem manifests as leaking

Any problems noted with new 3.5/3.9 engines? Have had 3.8 all iron engines in my last 3 GM cars and was very satisfied with them. Am now trying to decide whether to try the 2007 Chev LT with the 3.5 or 3.9 or go with the Buick Lacrosse and stay with the old reliable 3.8. Would appreciate any thoughts regarding the economy/reliability of the. During the 2001 to 2006 Silverado model years, GM had several different suppliers making the cast cylinder heads for the Vortec 4.8 and 5.3 liter engines. Some cylinder heads, made by the supplier Castech, began to crack, allowing coolant to seep into the oil Trouble Shooter. Low oil pressure and engine noise are often attributed to internal wear, especially on high mileage vehicles. The actual cause may be slightly less dramatic. A customer recently brought in his 2008 Chevrolet Silverado 1500, which is equipped with the 5.3L Vortec engine. The vehicle has about 200,000 miles on it and has been. GM truck owners complain that piston slap damages the engine and causes excessive oil and fuel consumption. Many consumers suffering from piston slap report that the knocking is constant, lasting well beyond the initial start-up, and appears regardless of the temperature. Additionally, consumers argue that the problem lowers the value of their. General Chevy & GM Tech Questions. 5.3 vortec oil pressure problems. Jump to Latest Follow 1 - 5 of 5 Posts We bought a device that blocks the signal that the engine control unit sends to switch the engine from V8 to V4, but this yielded ineffectual results

I am looking for the fuel pressure regulator location on a

The 4 Most 5.3 Liter Chevy Engine Problems & Quick Solution

In the early to mid-1960's, American automotive giants Chrysler, Ford, and General Motors ruled the streets and drag strips across the land. With every new car produced, the Big Three learned more about engine performance and how to squeeze every ounce of horsepower out of their engines by manually adjusting valve lash and ignition timing I have a 2000 Chevy K1500 4X4 with 5.3 liter engine. It has just over 200,000 miles but runs great. When extreme cold it try's to flood itself out. When outside temp is above 15 degree's it is fine. A read mor The problem with it, however, is that many (yes, many) customers don't want their 5.3- and 6.2-liter V8 trucks to save fuel this way. 27 photos DFM is an evolution of the Active Fuel Management. For '04, Chevrolet and GMC rolled out redesigned compact pickups, both of which would be powered exclusively by Atlas engines. The Chevrolet Colorado and GMC Canyon were offered with the 2.8-liter four (Vortec 2800) as the base engine, with the 3.5-liter five (Vortec 3500) as the optional mill. The big six would not be offered in these trucks Common Chevrolet Engine Problems. 5.3L Vortec 5300 Engine Oil Consumption. From 2010-2014 GM's Vortec 5300 engine had multiple design flaws that led to an excessive oil consumption responsible for soiled spark plugs, bent pushrods, and timing chain wear to name a few

The 2021 GMC Sierra 1500 competes with other competent light-duty picks up such as Ford F-150 and Chevrolet Silverado 1500.Changes for the 2021 Sierra 1500 include wireless Apple CarPlay and Android Auto, improved towing capacity, and new trailer-assist technologies.But major updates will come as part of the model year 2022 when the Sierra 1500 will be completely redesigned GM has encountered numerous oil pump failures with the 5.3L engines produced from 2007-2013, resulting in a loss of oil pressure due to sticking pressure regulating valves. On these engines, the oil pump is mounted on the front of the engine and is driven off the crankshaft at twice the speed of a camshaft driven pump

The recall affects 370,000 of the full-size trucks equipped with the 4.3-liter V-6 and 5.3-liter V-8 engines. It includes 303,000 trucks sold in the U.S. and 67,000 sold in Mexico. 2014 GMC Sierra. 33-MPG or Not, the 3.0L Duramax is the Most Efficient. Your mileage may vary, but so far the 3.0L Duramax hasn't quite lived up to the 33-mpg hype. We've seen trucks come close in 99-percent, steady-state highway cruising, but most hand-calculated fuel economy numbers for 4x2 model Silverados range from 27-mpg to 31-mpg They have a Trailblazer SS 6.0 liter 4l80e dropout with 38,000 miles on it right now for $4,000 COMPLETE pedals, ecm, harness and all. That engine is 400 hp, and was more fun to drive than your 5.3 AND no more VVT crap!!! Just a thought, no way I would spend $7,200 for a 5.3 when there are a ton of options out there Collapsed lifter and a bent pushrod. They took off the passenger side head to inspect, replaced the lifters. Not feeling really confident with this vehicle. I have a 2010 Tahoe i bought new with 242k miles and the only thing every replaced on the engine has been the spark plugs. My 2001.. 5.3L GM Engines; 5.4L Ford Engines; 5.7L GM Vortec Engines; 5.7L Chevy/GMC (350) Engines; 5.7L Dodge/Chrysler/Ram HEMI; 5.8L Ford Engines; 5.9L Chrysler/Dodge/Jeep Engines; 6.0L GM Engines; 6.0L GM Gen 2 Engines; 6.2 L GM Engines; 6.2L Ford Engines; 6.8L Ford Engines; 7.4L GM Engines; Remanufactured Transmissions. Chrysler Dodge Jeep 47RE.

The Ecotec engine typically has problems with its timing chain, which frequently slips and wears down after long periods of use. The tensor in the engine also suffers from damage sometimes, and the cylinders may not fire as they are supposed to, resulting in decreased engine efficiency. In order to avoid extensive damage to the vehicle, users. 2001-2006 Chevrolet Avalanche, Blazer, Silverado, Suburban, Tahoe, TrailBlazer Models 2001-2006 GMC Envoy, Jimmy, Sierra, Yukon Models 2001-2004 Oldsmobile Bravada 2005-2006 Saab 9-7X with 4.8L or 5.3L VORTEC® GEN III, GEN IV V8 Engine (VINs V, T, M, B, Z -- RPOs LR4, LM7, LH6, L33, L59) -----This bulletin is being revised to include engine. The LS based small-block engine is the primary V-8 used in General Motors' line of rear-wheel-drive cars and trucks. Introduced in January 1995, it is a clean sheet design with only rod bearings, lifters, and bore spacing in common with the longstanding Chevrolet small-block V-8 that preceded it as the basis for GM small-block V-8s. The basic LS variations use cast iron blocks, while. 2,568 Posts. Discussion Starter · #1 · Apr 30, 2009. My 1999 silverado with the 5.3 engine. the motor will occasionally surge at crusing speeds between 40 and 60 mph. I figured out how to induce it by letting off the gas and quickly giving it 1/4 throttle and about half the time this will cause the engine to surge First, you want to make sure that you are not misdiagnosing a low oil pressure problem. The Chevy Silverado has been known to flash the 'low pressure' warning signal as a result of a faulty switch. This is one of the common 5.3 Liter Chevy Engine Problems but it mostly occurs in the older models. So, if you are running an older engine, keep.

All the newest engines from GM including the 2.7T, 5.3 V8, and 6.2 V8 all can run on a single cylinder. So in stop and go city traffic, they are probably all running on one cylinder at some point. Only difference is when accelerating, the V8s will probably have all activated, while the turbo will be into the boost. Login to repl Clean the pistons by putting 118-147 ml (4-5 oz) of Upper Engine and Fuel Injector Cleaner, GM P/N 88861803. Allow the material to soak for at least 2.5-3.0 hours, but no more than three hours and then remove the cleaner by cranking the engine with the ignition coils and fuel injectors unplugged 2009 GMC Sierra 1500 4dr Crew Cab 5.5ft bed. 367-horsepower 6.0L V8 6-speed shiftable automatic 4WD w/low range. 5060 mi. White smoke on start up coming from tail pipe. Both the dealer's service manager and shop foreman witnessed the smoke. They claim that no problem exists, but to just monitor fluid consumption

Our engine experts will personally match up the right replacement engine for your Chevy and guarantee the best price available. We have full-line coverage of the LS engines from the standard 4.8 all the way up to the advanced technology of the DOD (displacement on demand) 5.3 , 6.0 and 6.2 models View all 65 consumer vehicle reviews for the Used 2019 Chevrolet Silverado 1500 on Edmunds, or submit your own review of the 2019 Silverado 1500

Chevy Vortec 5300 Common Engine Problems - 5

One common problem seen in the 5.3-liter engine is a failure of the valve cover to seal, which can cause heavy oil burn. Depending on the wear-and-tear on your vehicles, you may be able to get away with having the rings cleaned and getting a replacement valve cover that will seal again. Trucks that have been around the block a few more times. Another engine mechanical condition that also causes misfires is when the engine is burning excessive amounts of engine oil. This causes Carbon to build up on the spark plug's center electrode, eventually stopping spark. Other engine Mechanical problems are: vacuum leaks, dirty throttle plate and throttle bore

GM V8 Engines Experiencing Valve Lifter Issue

Lifter tick is a common occurrence in V-8 engines like the Chevy 5.3-liter Vortec. This ticking sound is caused by the valve lifters, which are filled with oil during engine operation. When your engine sits, the oil can seep out of the lifters. When this happens, the lifter will tick at start-up until it refills with engine oil October 2013. I see so many here talking about coolant leaking in the 5.3 engine, well people, the 5.3 engine is designed so no coolant can leak into it! 5.7 is different, they had serious coolant leak into engine issues, but those with 5.3 are not having issues with coolant leaking into the engine via intake because this cannot happen! 0 The AERA Technical Committee offers the following information regarding Lifter Noise And Low Oil Pressure On GM Engines on 1997-2013 GM 4.8L, 5.3L, 5.7L & 6.0L engines. This noise is only noticeable at idle and a slight increase in RPM will diminish the noise. The noise is also only present on a engine that has been brought to normal operating.

Chevy's Infamous 5.3 Lifter Tick (Solution!) - YouTub

I have a 2009 chevy suburban with a 5.3 engine. The front end was hit with a snow plow. Had front bumper fixed. Then the same side caliper and wheel bearing went bad. Get that fixed driving home less than three miles and the oil gauge was going from 40 to 0 and now there is a knocking noise in the engine I have a 2007 chevy Z71 1500 with 5.3 V8. I was wondering if there was any way to bypass cylinder deactivation to leave engine in 8 cylinder mode. I recently replaced # 7 cylinder lifters due to lifters not getting oil in 4 cylinder mode. I can see this will be an ongoing problem and can not afford 3500.00 dollar shop bills. Thanks for any hel The Big Problem with Chevy's 5.7 LT1 V8. Go to any dragstrip in America on any given night, and you will see a lot of fourth-generation Camaros and Firebirds. A natural drag racer with their fairly light weight, rear wheel drive, strong transmissions, and simple suspension, the mid-'90s F-body cars also featured a stout 350-cubic-inch LT1 V8

Misfire Due to Collapsed Lifter - TechLin

I've owned a 2001 GMC Sierra C-3 with the 6.0 motor, 325 hp, 3:73 gears for over 3 yrs. and have lots of friends with the 5.3 motors and mine really isn't that much fasterthan theirs. It's better at hauling or pulling a load but the quarter mile times are about the same at 15.7 to 15.9 GM's Active Fuel Management (AFM) works under certain light load driving conditions to maximize fuel economy by deactivating 4 of the engines 8 cylinders. The engine will operate on 8 cylinders in V8 mode during starting, idling, and medium or heavy throttle conditions Chevrolet Problems identified the most common issues and frequent complaints from owners: Engine: 20 percent have problems. HVAC: 14 percent have problems. Transmission: 14 percent have problems.

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Engine may start, run for a few minutes and stall. Smell of raw gasoline coming out of the tail-pipe. Basics Causes Of A Misfire Condition. A misfire will always be caused by a failed component in one of the three basic systems of your vehicle. These are: The fuel system. The ignition system. The engine (piston, cylinder, and cylinder head valves) In fact, if you have a 4.8 L 5.3 L or 6.0 L in any General Motors vehicle, including a Hummer or Pontiac, you will probably run into a check engine light indicating a defective knock sensor at some point.The check engine light registering a code P0332 or a P0327 is often the first sign you have this common problem. However, other issues can arise 85,239 Answers. Re: My chevy 5.3 idles low sometimes stalls at stops. Clean the throttle valve and the air bypass idle speed control valve, they get full of sludge and restrict air flow, this causes a low idle at times and the engine will stall, clean them by spraying carb spray into the throttle valve while the eng is running, have someone.

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2020 GMC Sierra 1500 AT4. Which 2020 Silverado 1500 engine is best for towing a 4,000 lbs, commuting, and an occasional long road trip? Is it the new 6.2-liter gas V8 or a 3.0-liter turbo-diesel I6 Crank the engine over to blow out all of the solvent and carbon. Change the oil and filter. Put the plugs back in and connect the coils, then start the engine. It will smoke real bad for a few min, but the ticking noise should be gone for a while. (20-30K miles) If you still have the noise after this, you probably have some weak lifters. Was this

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2002 Chevy Silverado 5.3 Liter engine oil pressure problems - Answered by a verified Chevy Mechanic i have a 5.3 liter 2002 chevy silverado 1500 with a bad tranny and i want to buy a 2002 1500 HD with a 6.0 liter that has been rolled and i was wondering if i put my cab on that chassis will the compu. 1. Excessive Oil Consumption. One of the most common 2007-2013 GMC and Chevy truck problems owners experience is excessive oil consumption. This problem led vehicle buyers to launch a class-action lawsuit against GM, which alleged 2010-2013 vehicles with Generation IV 5.3 Liter V8 Vortec 5300 engines were defective.Specifically, the lawsuit claimed the active fuel management (AFM) system. Anonymous, AZ (2010 GMC Sierra 1500 SLE 5.3-L V8) Throttle body sensor failed while driving 70 mph on a limited access hwy resulting in abrupt deceleration to 35 mph without warning. Anonymous. Intro to the LY5 Engines. The LY5 came in GM trucks and SUVs in 2007-'09 and made 320 horsepower right out of the box. It's a Gen. 4 5.3L iron-block engine, so you're getting the better intake manifold, connecting rods, and ECM. The engine also had 799/243 casting heads and 9.9:1 flat tops. 5.3's don't get much better Engine And Engine Cooling problem 29. Tl the contact owns a 2014 Chevrolet Silverado 1500. The contact stated that the air conditioner was blowing hot air. The contact called wilson Chevrolet (located at 4850 w 6th Ave, stillwater, ok 74074, (405) 334-5134) and informed the dealer about a class action lawsuit