2020 GMC Sierra 2500 Engine Problems
- Complaints
- 10about this part
- Share
- 13%of 79 total for the year
- Median mileage
- 2,800miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 10 complaints about the engine of the 2020 GMC Sierra 2500, 13% of the 79 complaints for this model year. Where a mileage was given, the median is 2,800 miles. 1 a fire, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“As I was driving home my check engine light came on and all of my lights went out. I had no tail lights and the radio started saying no signal detected. The dash screen was saying service keyless entry system. And I had no running lights but my headlights. Pretty scary thinking no one could see me as they were driving behind me at a high rate of speed. My truck only has 200 miles on it so this is really scary to be having issues so early in the ownership of this truck. …”
NHTSA complaint #11362480, filed 2020-10, 212 miles“I took my vehicle into the local dealership two weeks ago for the DPF emissions voluntary recall. Prior to the service I was getting 16.6 mpg for the 42000 miles on my truck. After the service, for the ~200 miles driven on same route and conditions commuting to and from work I have only been able to achieve ~13 mpg. There has been no other changes to my vehicle or operating conditions. …”
NHTSA complaint #11467081, filed 2022-06“Truck has had multiple issues related to the electrical system and truck modules. It is my opinion that these are all related to voltage issues or module problems. i have had multiple infotainment issues with delays loading, freezing up etc. dealer has ran updates and checks with nothing found. In October around $35k miles the truck Radio would not work if i used the push button start. if i shut the truck off opened the door and let everything reset i could push the start button in the truck and the radio would work majority of the time. The next day i went out to a completely dead truck. …”
NHTSA complaint #11448544, filed 2022-01“The contact owns a 2020 GMC Sierra 2500. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed, and the transmission jerked. The contact stated that the transmission was skipping gear while shifting. The check engine warning light turned on and off. The contact received notification of NHTSA Campaign Number: 24V797000 (Power Train); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. …”
NHTSA complaint #11635928, filed 2025-01, 114,000 miles“The contact owns a 2020 Gmc SIERRA 2500. The contact stated that while driving, he noticed smoke entering the vehicle through the air vents. The contact coasted to the side of the road, exited the vehicle safely with his passenger, upon opening the hood noticed that the whole engine compartment was on fire. The contact stated that the fire department arrived but was unable to extinguish the flames as they allowed the vehicle to burn until the fire self extinguished. The dealer nor the manufacturer was made aware of the failure. The failure mileage was approximately 2,800. …”
NHTSA complaint #11325262, filed 2020-05, 2,800 milesRelated service bulletins
- 11024330Sep 6, 2025This technical bulletin provides a procedure to replace the camshaft actuator magnet to correct customer concerns of engine related shudder.
- 11026017Jun 5, 2025This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
- 11024486May 16, 2025This bulletin advises the tech to inspect deeper into what may be to main cause of an engine failure.
- 11024485May 15, 2025The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the…
- 11020254May 7, 2025This service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California smog inspection or smog inspection in…
- 11019503Apr 18, 2025This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State who move to and register their vehicle in a California…
- 11017263Mar 25, 2025This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to…
- 11016945Mar 13, 2025This technical bulletin provides repair information to correct a customer concern of Evaporative DTCs P0442, P0446, P0455 or P0449, Caused by Dust Intrusion into the Evaporative…
- 11016942Mar 4, 2025This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to…
- 11014640Feb 28, 2025This Preliminary information communicates that some customers may comment that after an auto-stop event the engine does not restart and to inspect the engine ground strap…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 1 | 8% |
| 2025 | 4 | 14% |
| 2024 | 12 | 11% |
| 2023 | 3 | 9% |
| 2022 | 4 | 9% |
| 2021 | 8 | 15% |
| 2020 | 10 | 13% |
| 2019 | 6 | 19% |
| 2018 | 8 | 23% |
| 2017 | 6 | 16% |
| 2016 | 9 | 15% |
| 2015 | 7 | 8% |
| 2014 | 3 | 10% |
| 2013 | 1 | 2% |
| 2012 | 3 | 10% |
| 2011 | 5 | 8% |
| 2010 | 1 | 10% |
| 2009 | 2 | 6% |
| 2008 | 4 | 6% |
| 2007 | 1 | 1% |
| 2005 | 5 | 4% |
| 2004 | 9 | 6% |
| 2003 | 6 | 4% |
| 2002 | 2 | 1% |
| 2001 | 8 | 6% |
Other parts of the 2020 GMC Sierra 2500
25 complaintsOther or unknown
18 complaintsElectrical system
13 complaintsBrakes
12 complaintsSteering
6 complaintsBody and structure
6 complaintsForward collision avoidance
5 complaintsVehicle speed control
4 complaintsEngine cooling
2 complaintsExterior lighting
2 complaintsFuel system
2 complaintsTires
2 complaints
← All problems reported for the 2020 GMC Sierra 2500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology