2018 GMC Sierra Denali Other or unknown Problems
- Complaints
- 1about this part
- Share
- 6%of 17 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the other or unknown of the 2018 GMC Sierra Denali, 6% of the 17 complaints for this model year.
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.
“1-it needs to apply the brake so hard to make it stop at 100 km/hr and above.. 2-there is a jerk on down '2nd to 1st and up shifting 1st to 2nd gear. 3-front parking sensors sensitivities is not accurate .”
NHTSA complaint #11317267, filed 2020-03Related service bulletins
- 11037555Sep 26, 2026This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
- 11037253Sep 4, 2026This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
- 11035340Jul 21, 2026PI to help diagnose A/C concern
- 11030974Apr 1, 2026This preliminary information communicates information about how to determine if a wheel and tires size change is available.
- 11030092Mar 9, 2026This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
- 11030091Mar 9, 2026This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
- 11027601Jan 8, 2026This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
- 11025755Nov 20, 2025This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customer’s…
- 11023091Sep 9, 2025New Vehicle Monitoring Programs Section in IVH
- 11022084Aug 14, 2025This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
Other or unknown: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2019 | 5 | 19% |
| 2018 | 1 | 6% |
| 2017 | 3 | 20% |
| 2016 | 2 | 7% |
| 2015 | 2 | 9% |
| 2014 | 4 | 29% |
| 2013 | 6 | 75% |
| 2012 | 3 | 30% |
| 2011 | 17 | 61% |
| 2010 | 4 | 40% |
| 2009 | 3 | 43% |
| 2008 | 3 | 17% |
Other parts of the 2018 GMC Sierra Denali
5 complaintsBrakes
4 complaintsBody and structure
4 complaintsExterior lighting
3 complaintsSteering
3 complaintsElectronic stability control
2 complaintsTransmission and drivetrain
2 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 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