2018 GMC Sierra 1500 Vehicle speed control Problems
- Complaints
- 6about this part
- Share
- 2%of 305 total for the year
- Median mileage
- 47,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 6 complaints about the vehicle speed control of the 2018 GMC Sierra 1500, 2% of the 305 complaints for this model year. Where a mileage was given, the median is 47,000 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.
“I am the original owner of a 2018 GMC Sierra 1500 with the 6.2L L86 engine and 8-speed 8L90 transmission. I began experiencing severe transmission shuddering and harsh shifting, especially at lower speeds or under light acceleration. When the issue occurs, I press the gas and the engine revs up to 6,000 RPM without reaching 20 MPH, making it extremely difficult — and dangerous — to merge into traffic or cross intersections. This issue has worsened over time and is now a critical safety concern, especially with children in the vehicle. …”
NHTSA complaint #11665900, filed 2025-06“The speed of the truck will not increase. The rpms goes really high and the truck will not move into the next gear. The rear end of truck vibrates. I took this to the dealer and was told it is the transmission fluid is faulty. The check engine light does come on. I did not have the new transmission fluid changed because dealer said is cost $300 for the fluid and $100 for the labor and $168 for the diagnostics. So I still have the same problem. Also told you can not purchase this transmission fluid no where but Gmc.”
NHTSA complaint #11477417, filed 2022-08“Vehicle suddenly went into Reduced Engine Power while driving in heavy traffic. Vehicle immediately began to slow down and although there was some throttle response it was difficult to maneuver through traffic to get to the side of the road. This event happened around the 31,000 mile mark. The Reduced Engine Power message came on, but I do not remember hearing an audible alert. Being a 40 year Automotive Technician for GM, I am familiar with pulling codes and replacing parts. I called the dealership to see if this was covered by warranty and was told no. …”
NHTSA complaint #11431055, filed 2021-08“The truck displayed warning lights for ABS, traction control, trailer brakes, and front park assist. Additionally speed control (cruise) did not function. This presented a safety issue. I took to dealer asap. They repaired by replacing left rear wheel speed sensor. Cost about $216. Appears to work correctly at this time.”
NHTSA complaint #11441201, filed 2021-11Related service bulletins
- 11014171Jan 31, 2025This service bulletin provides information on proper use of floor mats.
Vehicle speed control: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 4 | 3% |
| 2025 | 7 | 6% |
| 2024 | 10 | 3% |
| 2023 | 11 | 2% |
| 2022 | 9 | 2% |
| 2021 | 7 | 1% |
| 2020 | 12 | 2% |
| 2019 | 10 | 2% |
| 2018 | 6 | 2% |
| 2017 | 11 | 3% |
| 2016 | 4 | 1% |
| 2015 | 7 | 1% |
| 2014 | 12 | 2% |
| 2012 | 1 | 1% |
| 2011 | 7 | 2% |
| 2010 | 6 | 4% |
| 2009 | 12 | 5% |
| 2008 | 3 | 1% |
| 2007 | 2 | 1% |
| 2006 | 1 | 1% |
| 2005 | 3 | 2% |
| 2004 | 11 | 5% |
| 2003 | 1 | 1% |
| 2002 | 1 | 1% |
| 2001 | 1 | 1% |
| 2000 | 6 | 3% |
| 1999 | 1 | 1% |
| 1998 | 1 | 2% |
| 1997 | 1 | 1% |
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 complaintsEngine cooling
6 complaintsForward collision avoidance
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 31, 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