2008 GMC Sierra Denali Problems
- Complaints
- 18filed with NHTSA
- Median mileage
- 58,000miles, 15 complaints with mileage
- Recalls
- 0campaigns on record
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
Sources: NHTSA records for the 2008 GMC Sierra Denali (complaints, recalls, investigations). Report an error
NHTSA recorded 18 consumer complaints for the 2008 GMC Sierra Denali. The part named most often is body and structure, with 6 complaints (33% of the total), followed by air bags (3) and other or unknown (3). 15 of the complaints include a mileage, and 47% of those were filed for vehicles with under 50,000 miles; the median is 58,000 miles. Of all complaints, 1 an injury, according to the filers. NHTSA lists 0 recall campaigns and 1,154 technical service bulletins for this model year. Body and structure complaints overlap with 35 technical service bulletins filed under the same part. Air bags complaints overlap with 13 technical service bulletins filed under the same part.
This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.
Which parts are reported most
Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.
- Body and structure6 33%
- Air bags3 17%
- Other or unknown3 17%
- Electrical system2 11%
- Brakes1 5.6%
- Exterior lighting1 5.6%
- Fuel system1 5.6%
Also reported: Wheels (1).
Example complaints
Body and structure: “I just read the safety notice for Gmc 2007 yukon interior door handles delaminating and creating sharp cutting edges (ea 10004). The exact same thing has happened on my 2008 Gmc denali sierra (driver side) - I've sliced my finger a 3rd time and am now having the handle replaced at a cost of $240. When I called Gmc customer complaint line they offered no help just excuses...poor customer service...wow, no wonder GM went bankrupt!!”
NHTSA complaint #10490928, filed 2013-01, 78,000 milesAir bags: “Takata recall went back to local chevy Gmc dealer again for the second time in almost 3 years since I received my recall letter from GM. They looked up recall and again told me that it has been recalled but they haven't agreed on whose going to fix the problem. I am tired of waiting and driving a truck that in my opinion is not safe to drive with this safety related issue. I want this fixed because 3 years is long enough to figure out whose paying and get the job done. If it dosen't get resolved soon I will have to take legal action against GM. …”
NHTSA complaint #11220456, filed 2019-06, 213,000 milesOther or unknown: “Dash board in cracking in two places over the speedometer and two places above the airbag. Cracks are continuing to appear on my dashboard which raises a concern of whether it would shatter if the airbag was to inflate during a accident.”
NHTSA complaint #11014532, filed 2017-08, 120,000 milesElectrical system: “I was driving on the highway when all the lights on the instrument cluster came on and went crazy and so did the radio. The trucks brakes locked up and came to a complete stop. The truck turned off and when I tried to turn it back on it was dead. Open up the hood and disconnected the battery and reconnected and the truck turned on this has not been the only time it has happen.”
NHTSA complaint #10667174, filed 2014-12, 91,030 milesMileage when problems were reported
47% of the 15 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 22,000 and 79,000 miles.
Complaints by year filed
Trend: stable. Complaints filed in the last 3 full calendar years are within 25% of the 3 years before.
Recalls and investigations
NHTSA lists no recall campaigns for the 2008 GMC Sierra Denali in the data used here. A recall can apply to some vehicles of a model year and not others, so check a specific vehicle by VIN at nhtsa.gov/recalls.
Technical service bulletins
TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 1,154 on record; the latest 10 are shown.
- 11023091Sep 9, 2025Other or unknown. New Vehicle Monitoring Programs Section in IVH
- 11021792Aug 7, 2025Other or unknown. This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming…
- 11020816Jul 18, 2025Other or unknown. This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
- 11019074May 30, 2025Other or unknown. This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini 50 terminal test probe, replacement terminals, and terminated leads.
- 11019073May 30, 2025Other or unknown. This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini 50 terminal test probe, replacement terminals, and terminated leads.
- 11019072May 30, 2025Other or unknown. This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini 50 terminal test probe, replacement terminals, and terminated leads.
- 11017252Mar 28, 2025Electrical system, Other or unknown. This service bulletin provides information for dealers/technicians on OnStar Module 2G Sunset Information.
- 11012907Dec 18, 2024Engine. This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
- 11010544Oct 7, 2024Engine. This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
- 11009531Sep 27, 2024Engine. This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
Other model years of the GMC Sierra Denali
| Year | Complaints | Median mi | Recalls | Crash ★ | MPG | Score (50 = typical) | Trend |
|---|---|---|---|---|---|---|---|
| 2020 | 11 | 20,000 | 0 | — | — | — | Not enough data |
| 2019 | 26 | 5,269 | 0 | — | — | 77 · More | Falling |
| 2018 | 17 | 28,000 | 0 | — | — | — | Falling |
| 2017 | 15 | 60,000 | 0 | — | — | — | Falling |
| 2016 | 30 | 48,000 | 0 | — | — | 50 · Typical | Falling |
| 2015 | 22 | 47,800 | 0 | — | — | — | Stable |
| 2014 | 14 | 59,496 | 0 | — | — | — | Not enough data |
| 2013 | 8 | 70,000 | 0 | — | — | — | Not enough data |
| 2012 | 10 | 50,000 | 0 | — | — | — | Not enough data |
| 2011 | 28 | 65,000 | 0 | — | — | 0 · Fewer | Falling |
| 2010 | 10 | 45,284 | 0 | — | — | — | Not enough data |
| 2009 | 7 | 94,000 | 0 | — | — | — | Not enough data |
| 2008 | 18 | 58,000 | 0 | — | — | — | Stable |
| 2006 | 5 | 61,000 | 0 | — | — | — | Not enough data |
| 2004 | 11 | 44,000 | 0 | — | — | — | Not enough data |
| 2002 | 13 | 79,315 | 0 | — | 12 | — | Not enough data |
All GMC Sierra Denali model years · Best and worst years by complaints
Frequently asked questions
How many NHTSA complaints does the 2008 GMC Sierra Denali have?
NHTSA recorded 18 consumer complaints for the 2008 GMC Sierra Denali as of Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
What part of the 2008 GMC Sierra Denali is reported most often?
Body and structure is named most often, in 6 complaints (33% of the total), followed by air bags with 3.
Has the 2008 GMC Sierra Denali been recalled?
NHTSA lists no recall campaigns for this model year in the data used here. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.
At what mileage are problems with the 2008 GMC Sierra Denali reported?
Among the 15 complaints that include a mileage, the median is 58,000 miles and the middle half falls between 22,000 and 79,000 miles; 47% were filed for vehicles with under 50,000 miles.
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.