Chevrolet Avalanche, GMT805 (USA / CAN)

Coolant capacity & service interval

Chevrolet Avalanche, GMT805 (USA / CAN) requires coolant with a capacity of 23,7 liters. Service intervals include checks every 12500 km or 12 months and changes every 240000 km or 60 months. The data covers 2 configurations.

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

TypeSpecifications
Avalanche 8.1 V8 (2001-2006)
  • Use: Normal
  • Capacity 23,7 liter
  • Check 12500 km/ 12 months
  • Change 240000 km/ 60 months
Avalanche 8.1 V8 AWD (2001-2006)
  • Use: Normal
  • Capacity 23,7 liter
  • Check 12500 km/ 12 months
  • Change 240000 km/ 60 months

Additional Notes

  • The Chevrolet Avalanche GMT805 with the 8.1 V8 engine carries a cooling system capacity of 23.7 liters, which is a notably large fill volume consistent with high-displacement truck engines that use extended coolant passages across a larger block and cylinder head surface area.
  • Both the standard and AWD variants of the 8.1 V8 share an identical cooling system capacity of 23.7 liters, meaning the addition of all-wheel-drive hardware introduces no measurable difference in coolant volume between the two configurations.
  • The coolant check interval is set at 12,500 km or 12 months under normal use conditions, whichever comes first, reflecting a routine inspection cadence rather than a full fluid exchange.
  • The coolant change interval extends to 240,000 km or 60 months under normal use conditions, a long-life service schedule that is typically associated with extended-life coolant formulations designed to maintain corrosion inhibitor effectiveness over multi-year periods.
  • The 60-month change interval spans five years, meaning a vehicle placed into service in 2001 under normal use conditions would reach its first scheduled coolant change in 2006, aligning with the final year of the 2001-2006 production span covered by these specifications.

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