2018 GMC Sierra Denali Body and structure Problems
- Complaints
- 4about this part
- Share
- 24%of 17 total for the year
- Median mileage
- 48,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the body and structure of the 2018 GMC Sierra Denali, 24% of the 17 complaints for this model year. Where a mileage was given, the median is 48,000 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.
“The rear end makes noise when turning and sometimes stoping. When weight is place on bed the rear end make noises. Something is wrong in the rear end of this truck. When truck is moving and turning you can here the noise.”
NHTSA complaint #11329880, filed 2020-06, 28,000 miles“The contact owns a 2018 GMC Sierra 1500 Denali. The contact stated while exiting a parking lot, the passenger’s side running board detached from the vehicle causing minor damages to the passenger’s side of the vehicle. There was no warning light illuminated. The dealer was contacted but provided no assistance and advised the contact that the running board needed to be replaced. The vehicle was not repaired. The manufacturer was contacted but provided no assistance. The failure mileage was 35,000.”
NHTSA complaint #11529615, filed 2023-06, 35,000 miles“The contact owns a 2018 GMC Sierra 1500 Denali. The contact stated that while driving at an undisclosed speed, and while the vehicle was parked, the running boards unexpectedly lowered. Additionally, there was oil leaking from the vehicle, and the check engine warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed with camshaft failure. The contact was informed that the camshaft needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 107,000.”
NHTSA complaint #11723657, filed 2026-03, 107,000 milesRelated service bulletins
- 11015382Feb 20, 2025This informational bulletin provides a procedure on how to remove the paint stain that may present itself under the shipping film.
- 11014171Jan 31, 2025This service bulletin provides information on proper use of floor mats.
- 11014238Jan 30, 2025This warranty administration service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
- 11011709Nov 5, 2024This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
- 11010493Oct 5, 2024This warranty administration service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
- 11009764Sep 21, 2024This service bulletin provides information on Concerns or Questions Regarding Installation of Dealer Installed Accessories.
- 11000550May 3, 2024This service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
- 10250244Jan 18, 2024This preliminary informational (PI) bulletin provides information to dealership personnel which may be helpful when addressing underbody component corrosion with customers.
- 10239124Jun 30, 2023This service bulletin provides information on Paintless Dent Repair Process.
- 10235561Apr 4, 2023This preliminary informational (PI) bulletin provides information to dealership personnel which may be helpful when addressing underbody component corrosion with customers.
Body and structure: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2019 | 1 | 4% |
| 2018 | 4 | 24% |
| 2016 | 1 | 3% |
| 2015 | 1 | 5% |
| 2014 | 2 | 14% |
| 2013 | 2 | 25% |
| 2012 | 2 | 20% |
| 2011 | 9 | 32% |
| 2010 | 4 | 40% |
| 2009 | 2 | 29% |
| 2008 | 6 | 33% |
Other parts of the 2018 GMC Sierra Denali
5 complaintsBrakes
4 complaintsExterior lighting
3 complaintsSteering
3 complaintsElectronic stability control
2 complaintsTransmission and drivetrain
2 complaintsOther or unknown
1 complaintsSuspension
1 complaintsWheels
1 complaints
← All problems reported for the 2018 GMC Sierra Denali
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 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