GMC Sierra, GMT T1XX (USA / CAN)

Power steering fluid capacity & service interval

GMC Sierra, GMT T1XX (USA / CAN) uses power steering fluid with a capacity of 2 liters. Service intervals include a check every 7500 miles. The data covers 6 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
Sierra HD 2500/3500 6.6 V8 (2022- )
  • Use: Normal
  • Capacity 2 liter
  • Check 7500 miles
Sierra HD 2500/3500 6.6 V8 AWD (2022- )
  • Use: Normal
  • Capacity 2 liter
  • Check 7500 miles
Sierra HD 2500/3500 6.6 Duramax V8 (2019- )
  • Use: Normal
  • Capacity 2 liter
  • Check 7500 miles
Sierra HD 2500/3500 6.6 Duramax V8 AWD (2019- )
  • Use: Normal
  • Capacity 2 liter
  • Check 7500 miles
Sierra HD 2500/3500 6.6 V8 (2019-2022)
  • Use: Normal
  • Capacity 2 liter
  • Check 7500 miles
Sierra HD 2500/3500 6.6 V8 AWD (2019-2022)
  • Use: Normal
  • Capacity 2 liter
  • Check 7500 miles

Additional Notes

  • All six configurations listed for the GMC Sierra HD 2500/3500 share an identical power steering fluid capacity of 2 liters, which is a typical figure for a hydraulic power steering reservoir and return-line system in a heavy-duty truck platform.
  • The 7,500-mile check interval applies uniformly across all listed configurations under normal use conditions, meaning the interval reflects standard driving rather than elevated-stress or commercial-duty operation.
  • The 6.6 Duramax V8 and the 6.6 gasoline V8 configurations both carry the same 2-liter capacity and 7,500-mile check interval, indicating no difference in power steering system sizing between the diesel and gasoline engine variants on the HD 2500/3500 platform.
  • AWD variants of both the 6.6 Duramax V8 and the 6.6 gasoline V8 share the same 2-liter capacity as their two-wheel-drive counterparts, showing that the addition of AWD hardware does not alter the power steering fluid volume specification.
  • The 6.6 gasoline V8 appears in two separate year-range entries, one covering 2019-2022 and another starting from 2022, with both carrying identical capacity and interval figures of 2 liters and 7,500 miles respectively.
  • A 7,500-mile service check interval for power steering fluid is a condition-monitoring interval rather than a mandatory fluid replacement interval, meaning the fluid level and condition are assessed at that mileage rather than automatically replaced.

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