2020 GMC Sierra 2500 Engine cooling Problems
- Complaints
- 2about this part
- Share
- 3%of 79 total for the year
- Median mileage
- 112,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the engine cooling of the 2020 GMC Sierra 2500, 3% of the 79 complaints for this model year. Where a mileage was given, the median is 112,500 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.
“The contact owns a 2020 GMC Sierra 2500. The contact stated that the vehicle was under NHTSA Campaign Number: 24V797000 (Power Train) and the vehicle was repaired. The contact stated that after the recall repair, the transmission started shifting hard. The vehicle was taken to the dealer, and the contact was informed that the transmission module would reprogram and adjust independently. The contact stated that a week later, while driving approximately 45 MPH, the vehicle started to run rough, and the message engine power reduced was displayed. …”
NHTSA complaint #11655399, filed 2025-04, 125,000 miles“The contact owns a 2020 GMC Sierra 2500. The contact stated that the check engine warning light was illuminated, and the message Reduced Power was displayed. The vehicle was taken to the dealer, where the turbo actuator and wastegate position sensor A-circuit were replaced; however, the failure persisted. The vehicle was taken back to the dealer, and the contact was advised that another diagnostic test was needed. The contact declined to pay for the diagnostic test. The vehicle was taken to a retired GM mechanic, who diagnosed the vehicle with turbo charger failure. …”
NHTSA complaint #11747347, filed 2026-06, 100,000 milesEngine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2022 | 1 | 2% |
| 2020 | 2 | 3% |
| 2019 | 2 | 6% |
| 2014 | 1 | 3% |
| 2013 | 1 | 2% |
| 2011 | 1 | 2% |
| 2009 | 1 | 3% |
| 2008 | 1 | 2% |
| 2007 | 2 | 2% |
| 2006 | 5 | 8% |
| 2005 | 13 | 11% |
| 2004 | 9 | 6% |
| 2003 | 5 | 3% |
| 2002 | 11 | 8% |
| 2001 | 21 | 16% |
| 2000 | 4 | 8% |
| 1998 | 1 | 7% |
Other parts of the 2020 GMC Sierra 2500
25 complaintsOther or unknown
18 complaintsElectrical system
13 complaintsBrakes
12 complaintsEngine
10 complaintsSteering
6 complaintsBody and structure
6 complaintsForward collision avoidance
5 complaintsVehicle speed control
4 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