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Other or unknownPart report

2003 GMC Sierra Other or unknown Problems

Complaints
4about this part
Share
2%of 206 total for the year
Median mileage
1,279miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 4 complaints about the other or unknown of the 2003 GMC Sierra, 2% of the 206 complaints for this model year. Where a mileage was given, the median is 1,279 miles. 1 a fire, according to the filers.

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.

“On may 31st, the rear end differential assembly exploded sending the pinon thru the housing and the rear axle caught on fire. The truck was in the shop (perry cheverolet, inc., columbia, mo)until 6-9-03. When I arrived in bozeman, mt on 7-2-03 I was having problems with the wiring. There was a fire when I plugged the rv electrical plug into the truck's trailer plug. There was also a blown rear tail light bulb. In bozman, they replaced the complete wiring harness, the tow receptacle and 2 fuse kits. …”

NHTSA complaint #10071042, filed 2004-01, 2,184 miles

“The passenger side climate control would receive an improper voltage reading. The system would turn to its preset default settings. (on full heat) it was then necessary to stop the vehicle, turn off the ignition system. This will allow the climate control system to reset its self. This happened only one time per day. (not always at the start of the day.) troubleshooting this system was a time consuming process. (5 trips to the shop just for this) to fix this the passenger side climate control system was replaced. (this required 4 days) total time to troubleshoot and repair was 4 weeks.”

NHTSA complaint #10049584, filed 2003-12, 374 miles

“The high-beam indicator light (blue) is extremely bright and is so aimed as to shine directly into the eyes of the driver. This causes a significant distraction due to the light shining directly at the left eye and also greatly reduces the visibility through the windshield due to the additional light. This has been reported to Gmc via the dealer and I was told that the light is part of a cluster and there is nothing that can be done to fix it. This light is a significant safety hazard and needs to be remedied. Dt”

NHTSA complaint #769031, filed 2002-10

Related service bulletins

Other or unknown: other model years

YearComplaintsShare of year
201735%
2016117%
201536%
201422%
201338%
2012310%
20111126%
2010618%
200938%
200834%
2007610%
200612%
200522%
200421%
200342%
200242%
200131%
200061%
199992%
199895%
199763%
199642%
199542%
199368%
199213%
199118%

Other parts of the 2003 GMC Sierra

Brakes
83 complaints
Electrical system
31 complaints
Transmission and drivetrain
29 complaints
Steering
27 complaints
Vehicle speed control
12 complaints
Engine cooling
9 complaints
Fuel system
7 complaints
Body and structure
6 complaints
Suspension
6 complaints
Air bags
5 complaints
Tires
5 complaints
Engine
3 complaints

← All problems reported for the 2003 GMC Sierra

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