2021 Chevrolet Silverado 2500 Engine Problems
- Complaints
- 8about this part
- Share
- 9%of 88 total for the year
- Median mileage
- 52,100miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 8 complaints about the engine of the 2021 Chevrolet Silverado 2500, 9% of the 88 complaints for this model year. Where a mileage was given, the median is 52,100 miles.
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.
“My truck will not start randomly. The truck will crank but won't fire. If I wait a while it will eventually start. I took it to the dealer and was told that they could not recreate it. No check engine light on and no error codes noted.”
NHTSA complaint #11406258, filed 2021-04, 4,200 miles“6.6l gas truck would not start. Forums ive visited state this is a known problem with the ECM. After approx 30mins it started. However before that it sputtered out every time I would try to start it. It appears to be an intermittent problem. It ran fine once it eventually did start. Also auto start wouldn't engage when this problem was occurring.”
NHTSA complaint #11388641, filed 2021-01, 1,656 miles“first issue was around April-May 2025 when my engine started knocking and burning fuel. Warning light came on and it went right in to the dealer where I have all my maintenance done. They determined that it due to (2) faulty fuel injectors and I had them replaced at that time. In December of 2025 my engine started doing the same thing as before with the knocking and burning fuel and reduced speeds when on the highway so again it went into the dealer. It has since been in there and first was told it was the fuel injector again. …”
NHTSA complaint #11711815, filed 2026-01“The contact owns a 2021 Chevrolet Silverado 2500. The contact stated that while driving 15 MPH, there was a knocking sound coming from the engine. The vehicle was taken to the local dealer, and the contact was informed that the engine was blown causing complete engine failure. The engine was replaced under warranty, but the failure reoccurred. The warranty company inspected the vehicle. The failure mileage was approximately 121,000.”
NHTSA complaint #11767683, filed 2026-09, 121,000 miles“Similar to the issues that were on the gas version of this engine and the recall associated with it. The engine seized on the expressway. When it was towed to the dealership, they said it was catastrophic engine failure. They found a lot metal shavings in the oil pan. They did not diagnose any further due to cost. At the time it happened, there were no warning lights or check engine lights on.”
NHTSA complaint #11724650, filed 2026-03Related service bulletins
- 11025492Nov 6, 2025Under Field Actions N252494000, N252494001, the service procedure includes performing a PICO test on vehicle engines within the identified suspect VIN population. If the engine…
- 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…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 2 | 17% |
| 2025 | 7 | 23% |
| 2024 | 13 | 9% |
| 2023 | 7 | 15% |
| 2022 | 7 | 7% |
| 2021 | 8 | 9% |
| 2020 | 10 | 9% |
| 2019 | 19 | 26% |
| 2018 | 12 | 23% |
| 2017 | 12 | 22% |
| 2016 | 8 | 7% |
| 2015 | 12 | 7% |
| 2014 | 7 | 18% |
| 2013 | 6 | 12% |
| 2012 | 8 | 15% |
| 2011 | 9 | 9% |
| 2010 | 2 | 10% |
| 2009 | 3 | 5% |
| 2008 | 4 | 2% |
| 2007 | 3 | 1% |
| 2006 | 5 | 3% |
| 2005 | 5 | 2% |
| 2004 | 14 | 4% |
| 2003 | 15 | 3% |
| 2002 | 13 | 4% |
| 2001 | 25 | 6% |
| 2000 | 1 | 1% |
| 1999 | 2 | 2% |
| 1997 | 1 | 2% |
Other parts of the 2021 Chevrolet Silverado 2500
30 complaintsElectrical system
17 complaintsBrakes
12 complaintsFuel system
8 complaintsLatches, locks and linkages
8 complaintsOther or unknown
7 complaintsBody and structure
4 complaintsForward collision avoidance
3 complaintsAir bags
2 complaintsBack-over prevention (rear camera)
2 complaintsExterior lighting
2 complaintsSteering
2 complaints
← All problems reported for the 2021 Chevrolet Silverado 2500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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