GMC Sierra 2500 HD 2025 - User Manual

2025 Sierra/Sierra Denali 2500 HD/3500 HD
Sierra/Sierra Denali
2500 HD/3500 HD
Essential Operating and
Safety Information
2025
United States
Scan to Access
United States and Canada
Customer Assistance
1-800-263-3777
Connected Services
1-888-4-ONSTAR
Customer Assistance
1-800-462-8782
Roadside Assistance
1-888-881-3302
• Owner’s Manuals
• Warranty Information
• Connected Services
• My GMC Rewards
• myGMC Mobile App
• How-To Videos
• Vehicle Diagnostics
• Scheduled Maintenance
• Vehicle Features
• Many Additional Resources
Canada
United States
87855304 B
Roadside Assistance
1-800-268-6800
Canada
C
M
Y
CM
MY
CY
CMY
K
ai1728064221105_25_GMC_Sierra_Denali2500HD_3500HD_EOSI_COV_en_US_87855304 B_2024OCT17.pdf 1 10/4/2024 1:50:28 PM

GMC Sierra 2500 HD 2025 Specifications