2018 GMC Sierra 1500 Engine cooling Problems
- Complaints
- 6about this part
- Share
- 2%of 305 total for the year
- Median mileage
- 111,871miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 6 complaints about the engine cooling of the 2018 GMC Sierra 1500, 2% of the 305 complaints for this model year. Where a mileage was given, the median is 111,871 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.
“Condenser on AC leaking at same location as the 2014-2017 my. Warranty was out due to mileage but truck is only 2 years 3 months old. Blowing warm air when AC was turned on.”
NHTSA complaint #11325336, filed 2020-05, 59,000 miles“The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed and depressing the accelerator pedal, the vehicle failed to accelerate as intended. The message Reduced Power was displayed, and the RPMs increased. Additionally, the vehicle jerked, and the contact noticed that there was smoke coming out of the exhaust pipe. The vehicle was driven to the contact's residence. …”
NHTSA complaint #11666618, filed 2025-06, 133,742 miles“The contact owns a 2018 GMC Sierra 1500. The contact stated that after starting the vehicle, there was an abnormal ticking sound coming from engine compartment. The vehicle was taken to the local dealer who diagnosed that the exhaust manifold bolts had fractured and needed to be replaced. The vehicle was not yet repaired. The manufacturer was not yet notified of the failure. The failure mileage was 64,000.”
NHTSA complaint #11626764, filed 2024-11, 64,000 miles“The contact owns a 2018 GMC Sierra 1500. The contact stated that while attempting to accelerate from a stoplight, the vehicle hesitated before accelerating. A day later, the failure reoccurred, and the RPMs increased before the vehicle accelerated. There were no warning lights illuminated. The vehicle was taken to the dealer, who diagnosed that the connecting rod had failed, and there were metal shavings inside the engine. The contact was informed that the engine needed to be replaced. …”
NHTSA complaint #11692321, filed 2025-10, 169,000 miles“The contact owns a 2018 GMC Sierra 1500. While starting the vehicle, it was shaking violently, with reduced power. The vehicle was restarted and worked as designed. Upon research, the contact associated the failure with NHTSA Action Number: PE25001 (Engine and Engine and Cooling). The vehicle was taken to an independent mechanic who determined there was metal in the engine, and there was a misfire coming from cylinder #2. The mechanic recommended that the engine be replaced. There were loose wires from the ECM, and the failure halted after the mechanic secured the wires. …”
NHTSA complaint #11714207, filed 2026-01, 150,000 milesEngine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 3 | 2% |
| 2024 | 31 | 8% |
| 2023 | 23 | 5% |
| 2022 | 29 | 5% |
| 2021 | 49 | 8% |
| 2020 | 21 | 4% |
| 2019 | 26 | 4% |
| 2018 | 6 | 2% |
| 2017 | 2 | 1% |
| 2016 | 3 | 1% |
| 2015 | 1 | 0% |
| 2014 | 5 | 1% |
| 2012 | 1 | 1% |
| 2011 | 2 | 1% |
| 2010 | 4 | 2% |
| 2009 | 4 | 2% |
| 2008 | 1 | 0% |
| 2007 | 7 | 3% |
| 2006 | 3 | 2% |
| 2005 | 8 | 5% |
| 2004 | 8 | 4% |
| 2003 | 3 | 2% |
| 2002 | 2 | 1% |
| 2001 | 3 | 2% |
| 2000 | 5 | 3% |
| 1999 | 6 | 4% |
| 1998 | 3 | 5% |
| 1997 | 1 | 1% |
| 1996 | 1 | 20% |
Other parts of the 2018 GMC Sierra 1500
131 complaintsEngine
67 complaintsBrakes
44 complaintsElectrical system
43 complaintsSteering
30 complaintsOther or unknown
25 complaintsFuel system
11 complaintsSuspension
11 complaintsAir bags
8 complaintsWheels
7 complaintsForward collision avoidance
6 complaintsBody and structure
6 complaints
← All problems reported for the 2018 GMC Sierra 1500
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