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The GMC Pro Grade Warranty offers helpful features and services including:   

  • 3-year/36,000-mile Bumper-to-Bumper Limited Warranty1
  • 5-year/60,000-mile Powertrain Limited Warranty1
  • 5-year/60,000-mile Roadside Assistance1
  • 5-year/60,000-mile Courtesy Transportation1
  • GMC 3-year/36,000-mile Limited Corrosion Protection1
  • GMC 6-year/100,000-mile Limited Rust-Through Protection1
To help you feel protected, Sierra 2500 Denali HD and Sierra 3500 Denali HD pickup trucks equipped with a 6.6L Duramax ® Turbo Diesel Engine are covered for 5 years or 100,000 miles, whichever comes first.
 
See all the warranty details.

1. Whichever comes first. See dealer for details.