2003 GMC Sierra 3500: common problems

Owners of the 2003 GMC Sierra 3500 filed 7 complaints with NHTSA, most often about service brakes and air bags. Details by component below, with sources.

Key figures

Owner complaints: 7
involving a crash: 1

What fails most often

1 Service brakes 43% of all complaints
2 Air bags 14% of all complaints
3 Electrical system 14% of all complaints
4 Fuel system 14% of all complaints
5 Powertrain 14% of all complaints
6 Seat belts 14% of all complaints
7 Steering 14% 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: 3 complaints (43% of all).
Air bags: 1 complaints (14% of all), 1 of them with a crash reported by the owner.
Electrical system: 1 complaints (14% of all).
Fuel system: 1 complaints (14% of all).
Powertrain: 1 complaints (14% of all).

Symptoms owners describe

How many of the 7 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).

rust, corrosion2 · 29%
airbags did not deploy1 · 14%
brake failure1 · 14%
seat belts1 · 14%
stalls while driving1 · 14%
steering or power steering problems1 · 14%
windows, sunroof1 · 14%

Components owners complain about

Component	Owner complaints	involving a crash
Service brakes	3	0
Air bags	1	1
Electrical system	1	0
Fuel system	1	0
Powertrain	1	0
Seat belts	1	1
Steering	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.

However, the seat belt did not retract and hold the contact in the seat and the air bags did not deploy. The contact's head hit the passenger door window at such force the window shattered and broke. The contact's head was lying outside the vehicle on the asphalt.
Air bags · crash · 2006-02-15 · NHTSA complaint #10150304
Brake lines are heavily rusted, truck is beyond warranty, dealer will not replace unless recalled.
Service brakes · 2014-11-12 · NHTSA complaint #10654338
I only had 27050 miles when brake lines, burst luckily traveling only 5 mph. I had to replace all brake lines, rear brake calipers. Then at 28,640 miles I had to replace the master cylinder. What in the world is gm doing? What happened to the quality of gm?
Service brakes · 2013-01-08 · NHTSA complaint #10491894
I recently had a brake failure on my 2003 gmc sierra 3500 series truck. I was driving when my brakes gave out. The pedal went to the floor and I was barely able to stop before striking a parked car.
Service brakes · 2012-01-25 · NHTSA complaint #10445199
The contact stated that the vehicle would stall without warning. The fuel injectors were replaced but the failure recurred and caused damage to the engine. The vehicle was not further repaired. The failure mileage was 80,000 updated 9/20/11 updated 2/23/12
Fuel system · 2011-08-26 · NHTSA complaint #10421632
Power steering and/or braking may become inoperative or drastically reduced performance when used at same time because power steering pump is also power brake pump and system does not have enough pressure or flow capacity to supply both steering and braking together. This could result in loss of control of vehicle.
Steering · 2011-06-25 · NHTSA complaint #10408894
2003 gmc speedometer not working. This is a very common problem with gmc and there should be a recall.
Electrical system · 2007-02-12 · NHTSA complaint #10182300

When owners complained

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

20061
20071
20112
20121
20131
20141

Comparison

By complaint count this model year ranks 12,539 of 36,659 model years in the NHTSA data (top 34% most complained about).

On average one model year of the Sierra 3500 has 19 complaints (31 years in the data). This year has 7, below average.

What to check before buying

Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
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.
Fuel system. Fuel smell, leaks, rough running, fuel-system codes.

Questions and answers

What are the most common problems with the 2003 GMC Sierra 3500?

Owner complaints to NHTSA most often mention: service brakes, air bags, electrical system. Total complaints: 7. The most frequent symptoms in complaint texts: rust, corrosion (29%), airbags did not deploy (14%), brake failure (14%).

How many service bulletins (TSB) were issued for the 2003 GMC Sierra 3500?

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 2003 GMC Sierra 3500 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 2003 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 2026-11-06.