Gmc Sierra hd Transmission Problems
1 owner complaints filed with NHTSA across 1 model years.
Complaints by Year
Worst year: 2025. Best year: 2025.
Owner Reports
A representative sample of complaints filed with NHTSA.
Transmission · 2025 1
The 2025 GMC Sierra 2500 HD, equipped with the 10-speed "Allison" transmission, rough shifting,