2002 GMC Sierra Denali: common problems

Owners of the 2002 GMC Sierra Denali filed 13 complaints with NHTSA, most often about service brakes and steering. Details by component below, with sources.

Key figures

Owner complaints: 13
involving a crash: 1

What fails most often

1 Service brakes 77% of all complaints
2 Steering 23% of all complaints
3 Air bags 8% of all complaints
4 Electrical system 8% of all complaints
5 Engine and cooling 8% of all complaints

Circle size and colour show each component’s share of NHTSA complaints. Schematic only, not a drawing of the exact model.

Service brakes: 10 complaints (77% of all), 1 of them with a crash reported by the owner.
Steering: 3 complaints (23% of all), 1 of them with a crash reported by the owner.
Air bags: 1 complaints (8% of all), 1 of them with a crash reported by the owner.
Electrical system: 1 complaints (8% of all).
Engine and cooling: 1 complaints (8% of all).

Symptoms owners describe

How many of the 13 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).

brake failure4 · 31%
rust, corrosion4 · 31%
smoke, burning smell, fire1 · 8%
stalls while driving1 · 8%
warning lights, check engine1 · 8%

Components owners complain about

Component	Owner complaints	involving a crash
Service brakes	10	1
Steering	3	1
Air bags	1	1
Electrical system	1	0
Engine and cooling	1	0

What owners report

Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.

I called usaa 3 days after the crash after finding so many brake failures on this vehicle/year model and was told it was already destroyed, so doing an investigation was not possible. I have lived in pain and also paralyzing fear of driving since then; 3 years.
Service brakes · crash · 2017-10-02 · NHTSA complaint #11030762
100% brake failure due to ruptured metal brake line, severe corrosion. All lines require replacement. Gmc notified, no replace parts supported by manufacturer. Truck stopped with use of emergency brake.
Service brakes · 2012-01-10 · NHTSA complaint #10443253
Exhaust manifold bolts break causing emission failure and exhaust leak. The repair bill is up to $1000. Or more. You have to have a garage drill out old bolts and replace.
Engine and cooling · 2010-12-30 · NHTSA complaint #10373399
The contact later inspected the vehicle and discovered that the brake lines were corroded. The dealer and the manufacturer had not been notified. The failure mileage was approximately 75,000.
Service brakes · 2010-11-01 · NHTSA complaint #10363466
The abs light came on. Since that time, on two separate occasions while turning at slow speeds, the truck has stalled in an intersection. After reviewing the recall information and calling gm and our dealership, no open recalls apply to the truck.
Steering · 2009-06-03 · NHTSA complaint #10272751

When owners complained

NHTSA complaints by filing year. The peak shows at what age the problems show up most.

20061
20071
20081
20092
20104
20121
20141
20171
20191

Comparison

By complaint count this model year ranks 9,843 of 36,656 model years in the NHTSA data (top 27% most complained about).

On average one model year of the Sierra Denali has 14 complaints (18 years in the data). This year has 13, about average.

What to check before buying

Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
Steering. Steering play, power assist, rack and tie rods after a wheel impact.
Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.

Other years of this model

Questions and answers

What are the most common problems with the 2002 GMC Sierra Denali?

Owner complaints to NHTSA most often mention: service brakes, steering, air bags. Total complaints: 13. The most frequent symptoms in complaint texts: brake failure (31%), rust, corrosion (31%), smoke, burning smell, fire (8%).

How many service bulletins (TSB) were issued for the 2002 GMC Sierra Denali?

NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.

Should I buy a 2002 GMC Sierra Denali from a US auction?

Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.

Other 2002 models

Read also

Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.