2003 GMC Sierra transmission problems
The 2003 GMC Sierra has 31 transmission complaints filed with NHTSA — 13% of the year's total, and up sharply from the prior model year.
31
Transmission complaints
13%
Share of year
2
Crash-involved
0
Related recalls
Transmission complaints by year
What owners report
“TRUCK WAS ENTERING MAJOR HIGHWAY,TRAFFIC BEGINS TOO SLOW DUE TO RUSH HOUR ,SEEING THIS OCCUR I STEPPED ON BRAKES EXPECTING TO SLOW DOWN ,UNTIL I REALIZED PEDAL HAD GONE ALL THE WAY TO FLOOR,THEN I LET UP AN PUSHED TO FLOOR AGAIN-NO BRAKES NO ROOM TO GO LEFT OR RIGHT IMPACT WAS UNAVOIDABLE,IMPACTED…”
Common questions
How many transmission complaints does the 2003 GMC Sierra have?
NHTSA has 31 complaints about the 2003 GMC Sierra transmission — 13% of all complaints filed for that model year.
Related
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.