2020 Sierra 6.2L, 500 miles on odometer, broke down 4 weeks ago. Engine is toast.

[GMCnoob]

Bought this 2020 Sierra with the 6.2L in October. Had some electrical issues with cameras and display malfunction that was repaired earlier. 
 

4 weeks ago I was driving and truck had some vibrations and suddenly broke down. Towed into the dealership service department and didn’t hear anything until this week. The engine is seized up, coolant in the oil when they drained it. They are saying they need to tear down the engine and diagnose it and then probably replace it along with an extended warranty. 
 

I’m trying to wrap my head around a truck with 500 miles already having electrical issues now followed by the engine being destroyed within 2 months. I love the look of the truck and the powertrain, but I’m not sure I can confidently take my kids into the mountains away from cell phone coverage while towing a trailer based on this experience so far.

 

Has anyone experienced anything like this? Did GM rebuild or replace the engine and give you an extended warranty? Did they offer to swap you for a new truck? Did they offer to refund the purchase? The truck has basically been in the shop half the time I’ve owned it at this point, not sure how long it takes to replace an engine.

 

What a bummer. Thanks for any help / advice.

[johnnypayne66]

Sorry about your truck. I had an oil pump failure on my 2020 Sierra 6.2.

dealer kelp truck 4 weeks for the repair.   I’m with you I’m a little shy about how it’s going to perform from now on.  Engine survived , but it’s had open heart surgery.

[1997SierraSLT]

I’d be more concerned about the plethora of electrical issues and patented GM “glitches”.  Nothing like randomly losing your brakes, power steering or having the engine die on you.  Then GM informs you, “sorry, no codes were set, cannot duplicate”.  

 

GM has become a line of vehicles I’d never want my family in for fear of their safety.

[ericarenee]

These kind of issues happen across every brand, Every Vehicle on the market. Its Rear and Limited in the numbers who have the problems. This has been going on nearly forever. The big difference now is the Internet , Social Media and Web forums like this one. Access to millions of other people . Most of the time we never think about going online to brag about something that is working as it should, that is what we just expect. Its a Mechanical contraption forced to be controlled by way to many electronics chasing fuel and epa ratings not to mention fierce brand competition. 

If repaired properly it will be same as brand new. Maybe even better because you will have one or two  Techs that are car people work on it. not a bunch of robots and robot like people on a assembly line just there to get a pay check. So sorry to hear about your Truck and its issues   but like buying anything else they can happen and happen at any time. I think your lucky for it to be at so few miles which puts you in a better position to insure they take care of you properly at the Stealership and GM. 

My conclusion is these Trucks like all other trucks and brands are not all Doomed to fail most will  be super reliable and last as long as they were designed to. 

 

Thank you for Reading . 

[redwngr]

'Infant mortality' can happen with anything.  

Bathtub curve  is well known in the the reliability world. 

 

It's the number one reason I wouldn't take a brand new anything - truck/camper/boat/motorcycle/tent/etc/etc - on vacation without first doing some sort of shakedown/break-in. 

 

 

 

Sucks when a failure of any kind happens to something you own -- especially disappointing when it's new.

 

IMHO, how the dealer/company deals with the failure is more important than that the failure occurred. 

 

 

 

Some will be interested, some will say to much information...

 

https://www.weibull.com/hotwire/issue21/hottopics21.htm

 

https://www.google.com/search?q=bathtub+curve+explained&rlz=1C1CHBF_enCA775CA775&oq=bathtub+curve&aqs=chrome.2.69i57j0l7.7223j0j7&sourceid=chrome&ie=UTF-8

 

Edited December 12, 2020 by redwngr

[Tigerwitha88]

On 12/12/2020 at 3:18 AM, GMCnoob said:

Bought this 2020 Sierra with the 6.2L in October. Had some electrical issues with cameras and display malfunction that was repaired earlier. 
 

4 weeks ago I was driving and truck had some vibrations and suddenly broke down. Towed into the dealership service department and didn’t hear anything until this week. The engine is seized up, coolant in the oil when they drained it. They are saying they need to tear down the engine and diagnose it and then probably replace it along with an extended warranty. 
 

I’m trying to wrap my head around a truck with 500 miles already having electrical issues now followed by the engine being destroyed within 2 months. I love the look of the truck and the powertrain, but I’m not sure I can confidently take my kids into the mountains away from cell phone coverage while towing a trailer based on this experience so far.

 

Has anyone experienced anything like this? Did GM rebuild or replace the engine and give you an extended warranty? Did they offer to swap you for a new truck? Did they offer to refund the purchase? The truck has basically been in the shop half the time I’ve owned it at this point, not sure how long it takes to replace an engine.

 

What a bummer. Thanks for any help / advice.

With a engine replacement or rebuild on the original engine at 2 months in, I would request meeting with someone high enough up at the dealership demanding a good trade in option. If they swap the engine its going to hurt the value even more. Your only option is to keep it w/replaced, rebuilt engine from the start or deal with the original dealership at a better deal on a new truck, another dealership wont touch it.

I had it happen to me on a 2009 silverado, it drank oil from the start and by 43,000 and 15+ service vists engine had a bottom end done at dealership under warranty. 

For me I wasn't going to make payments on a truck with rebuilt engine. I approached the #2 at the dealership and hashed out a good trade in value no other dealership would have given. 

[GMCnoob]

30 minutes ago, Tigerwitha88 said:

With a engine replacement or rebuild on the original engine at 2 months in, I would request meeting with someone high enough up at the dealership demanding a good trade in option. If they swap the engine its going to hurt the value even more. Your only option is to keep it w/replaced, rebuilt engine from the start or deal with the original dealership at a better deal on a new truck, another dealership wont touch it.

I had it happen to me on a 2009 silverado, it drank oil from the start and by 43,000 and 15+ service vists engine had a bottom end done at dealership under warranty. 

For me I wasn't going to make payments on a truck with rebuilt engine. I approached the #2 at the dealership and hashed out a good trade in value no other dealership would have given. 

Yeah, that’s definitely a concern is let’s say the truck does happen to work correctly after all this (maybe, maybe not). There is a lot of value now lost on the truck because when I want to get a new vehicle in the future, nobody is going to give me market value for this particular truck. It’s either a lemon or very lemon-like. Someone has to eat that depreciation compared to a normal truck. It’s either me, the dealership, or GM. So I’m not sure who it will be at this point. But I think if I keep the truck with just an extended warranty, I am super upside down after the additional depreciation.

[newdude]

On 12/12/2020 at 3:18 AM, GMCnoob said:

Bought this 2020 Sierra with the 6.2L in October. Had some electrical issues with cameras and display malfunction that was repaired earlier. 
 

4 weeks ago I was driving and truck had some vibrations and suddenly broke down. Towed into the dealership service department and didn’t hear anything until this week. The engine is seized up, coolant in the oil when they drained it. They are saying they need to tear down the engine and diagnose it and then probably replace it along with an extended warranty. 
 

I’m trying to wrap my head around a truck with 500 miles already having electrical issues now followed by the engine being destroyed within 2 months. I love the look of the truck and the powertrain, but I’m not sure I can confidently take my kids into the mountains away from cell phone coverage while towing a trailer based on this experience so far.

 

Has anyone experienced anything like this? Did GM rebuild or replace the engine and give you an extended warranty? Did they offer to swap you for a new truck? Did they offer to refund the purchase? The truck has basically been in the shop half the time I’ve owned it at this point, not sure how long it takes to replace an engine.

 

What a bummer. Thanks for any help / advice.

 

 

There is a known valve spring issue on these engines right now.  If its damaged bad enough, you will get an engine.  

 

Some trucks have a field inspection on them as well.

 

Quote

 

#PIP5752G: Service Engine Light Misfire Engine Noise With DTC P0300 P0106 P0506 - (Nov 20, 2020)

Involved Region or Country	North America
Condition	A Vehicle may have a concern of service engine light, misfire and engine noise with possible of DTC P0300 P0106 P0506,P3189, P318A, P318B, P318C, P318D, P318E, P318F, P3190.
Cause	Possible broken valve spring.

Note: If you suspect you have a valve spring concern please contact Technical Assistance at (866) 960-6006 (after providing your case number, please select prompt one for engine Drivability then, prompt one for gasoline engines) TAC will assist with issue verification and expediting parts. In Canada, contact the Canadian Technical Assistance Centre at the number you have been provided.

Correction

During inspection if you determine that the engine has a broken valve spring it will be necessary to perform a cylinder leakage test on the affected cylinder.

If no cylinder leakage is observed and the vehicle is built between June 1, 2020 to October 7, 2020:

• For engines with  RPOs L82, L84 and L8T replace the affected valve spring, if the vehicle is built between June 1, 2020 to October 7, 2020.
• For 6.2L engines RPOs L87, LT1, LT4 and LT2 It will be necessary to replace all valve springs on both banks if the vehicle is built between June 1, 2020 to October 7, 2020.

Note: Brand Quality has placed the following Part number for 2020, 2021  6.2L L87, LT1, LT2, LT4 valve springs on a Technical Assistance Center part restriction

P/N 12691120 - 6.2L L87, LT1, LT2, LT4

Please add any pictures of the concern to the case that will help with the diagnostics. 

Check for a damaged intake manifold runner for the cylinder with the concern.  

00-06-01-026M: Engine Replacement After Severe Internal Engine Damage -Replace Intake Manifold

If you determine that engine has cylinder leakage it will be necessary to inspect further to determine the extent of the engine damage to determine correct repair required;

• For 6.2L engines RPOs L87, LT1, LT4 and LT2 that has engine damage please follow PIP5759 for engine restriction.  

Important: All valve springs will be requested back for further analysis and inspection.

 

 

Quote

 

#N202319660: Service Update - Valve Spring Failure - (Nov 20, 2020)

Inspection Procedure

1. Ensure vehicle has a ½ tank of fuel minimum.
2. Set vehicle up in a secure area where it cannot be stolen, with adequate ventilation (use exhaust vent hose if indoors) and open the hood or engine compartment lid. Keep vehicle away from any flammable surroundings or substances. Ensure the A/C is off. Finally, position a box fan blowing at the vehicle’s radiator.
   • For Corvette Convertible, remove the folding top stowage compartment lid. Refer to Folding Top Stowage Compartment Lid Replacement in SI. Then, pause the convertible top halfway up, and position a box fan blowing down into the engine compartment. Be sure the area around the coolant reservoir is getting adequate airflow.
   • For Corvette Coupe, position a box fan blowing down into the engine compartment. Be sure the area around the coolant reservoir is getting adequate airflow.
   • For Manual Transmission equipped vehicles, be sure the vehicle has the parking brake engaged, the vehicles wheels are chocked, and the transmission is in neutral before performing the following steps.
3. Apply the brake and start the vehicle, holding the Engine Start/Stop button for at least 15 seconds.
   • At this point, C8 Corvettes and T1 SUVs will display an “Automatic Shutdown Disabled” message on the DIC.
   • Other vehicles will not display this message on the DIC, but by holding the Engine Start/Stop button for 15 seconds, the feature will still be activated on T1 Trucks and Camaros.
4. Set up your laptop in the vehicle, plugging the charging cable into the vehicle’s 110v power plug (or use an extension cord if the vehicle is not so equipped), and the MDI 2 into the vehicle’s OBDII port.
5. Open Techline Connect and navigate through GDS2.
   • Select K20 Engine Control Module > Control Functions > Engine Speed/Throttle > Engine Speed.
   • Drag the slider to the right until the engine’s idle speed is set to 2,000 RPM.
6. Using your phone or a timer you can keep near you, set a timer for 4 hours and 30 minutes and allow the vehicle to run.
7. Check on the vehicle at a minimum of 25-minute intervals to ensure it is still running, and run down the below checklist – the more often you can check on it, the better. The checklist includes:
   • Normal Engine Operating Temperature
   • No abnormal valve train noise
   • No check engine light (especially P0300 or P030X)
   • No abnormal burning smells (catalytic converter break-in smell is normal operation).
   • Look underneath the vehicle and ensure there are no leaks.
8. If for some reason the vehicle does shut off during the test, restart it per the original instructions and continue the test from the time point where the vehicle shut off. It is not necessary to restart the entire test.
9. If any of these conditions are detected, immediately stop the test, immediately call the GM Technical Assistance Center for further instructions. For U.S. Dealers contact 877-446-8227. For Canadian Dealers contact 800-263-7740 (English) or 800-263-7960 (French). For International Dealers, if any of these conditions are detected, follow normal diagnostic and parts ordering procedures.
10. If 4.5 hours passes and none of these conditions are detected, replace any removed components and take the vehicle for a 10 mile test drive. Ensure the computer and MDI remain in the vehicle during this test drive so you can check DTCs if necessary. Utilize manual shifting mode for the entire duration of the test drive, attempting to keep RPM between 2000 and 3500 RPM. During the test drive, monitor for the below conditions. If any of these conditions are found during the test drive, immediately return to the dealership, keeping the engine RPM as low as possible and avoiding heavy throttle.
    • Normal Engine Operating Temperature
    • No abnormal valve train noise
    • No check engine light (especially P0300 or P030X)
    • No abnormal burning smells (catalytic converter break-in smell is normal operation).
11. If both the high-idle test and the road test complete successfully without any of the above described issues, no further testing is required.
12. Perform an oil change. Refer to Engine Oil and Oil Filter Replacement in SI.

 

 

Edited December 14, 2020 by newdude