Hummer H1
Maintenance specs for 3 variants of the Hummer H1 — from 1992 to 2006.
1992–1995 Hummer H1
6.5L V8 Diesel (NA) (6.5L IDI) · 4WD
150 hp / 257 lb-ft
Transmission
Type3-Speed Automatic (3L80)
FluidDexron III ATF
Drain & fill4 qt
Full capacity10 qt
Power Steering
TypeHydraulic
FluidGM Power Steering Fluid
Capacity16 oz
Differentials
Front fluid75W-90 GL-5
Rear fluid75W-90 GL-5
Transfer Case
FluidDexron III ATF
Fuel
Tank25 gal
TypeDiesel
Service Intervals
Oil change3,000 mi
Trans service30,000 mi
Coolant flush60,000 mi
Brake fluid30,000 mi
Timinggear (no scheduled replacement)
Air filter15,000 mi
Drive belt60,000 mi
1995–2000 Hummer H1
6.5L V8 Turbo Diesel (6.5L IDI Turbo) · 4WD
195 hp / 430 lb-ft
Transmission
Type4-Speed Automatic (4L80-E)
FluidDexron III ATF
Drain & fill5 qt
Full capacity13 qt
Power Steering
TypeHydraulic
FluidGM Power Steering Fluid
Capacity16 oz
Differentials
Front fluid75W-90 GL-5
Rear fluid75W-90 GL-5
Transfer Case
FluidDexron III ATF
Fuel
Tank25 gal
TypeDiesel
Service Intervals
Oil change3,000 mi
Trans service30,000 mi
Coolant flush60,000 mi
Brake fluid30,000 mi
Timinggear (no scheduled replacement)
Air filter15,000 mi
Drive belt60,000 mi
2001–2006 Hummer H1
6.6L V8 Duramax Turbo Diesel (LB7/LLY) · 4WD
300 hp / 520 lb-ft
Transmission
Type4-Speed Automatic (4L85-E)
FluidDexron VI ATF
Drain & fill5 qt
Full capacity14 qt
Power Steering
TypeHydraulic
FluidGM Power Steering Fluid
Capacity16 oz
Differentials
Front fluid75W-90 GL-5
Rear fluid75W-90 GL-5
Transfer Case
FluidDexron VI ATF
Fuel
Tank25 gal
TypeDiesel
Service Intervals
Oil change5,000 mi
Trans service30,000 mi
Coolant flush150,000 mi
Brake fluid30,000 mi
Timinggear (no scheduled replacement)
Air filter15,000 mi
Drive belt60,000 mi