GMC Envoy (USA / CAN)

Coolant capacity & service interval

GMC Envoy (USA / CAN) coolant capacity ranges from 9,2 to 17 liters. Service intervals include checking every 12 months and changing every 150000 miles or 60 months. The data covers 4 configurations.

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

TypeSpecifications
Envoy 4.2 24V (2006-2009)
  • Use: Normal
  • Capacity 9,2-10,2 liter
  • Check 12 months
  • Change 150000 miles/ 60 months
Envoy 5.3 V8 (2006-2009)
  • Use: Normal
  • Capacity 10,6-11,6 liter
  • Check 12 months
  • Change 150000 miles/ 60 months
Envoy 5.3 V8 (2003-2005)
  • Use: Normal
  • Capacity 11,6-17 liter
  • Check 12 months
  • Change 150000 miles/ 60 months
Envoy 4.2 24V (2001-2005)
  • Use: Normal
  • Capacity 10,2-14,4 liter
  • Check 12 months
  • Change 150000 miles/ 60 months

Additional Notes

  • The GMC Envoy 4.2 24V from 2001-2005 carries a cooling system capacity range of 10.2 to 14.4 liters, while the same engine in 2006-2009 models shows a narrower and lower range of 9.2 to 10.2 liters, reflecting a meaningful reduction between the two generation spans.
  • The 5.3 V8 from 2003-2005 has the widest capacity spread across all listed configurations, ranging from 11.6 to 17.0 liters. A wide range like this typically indicates variation between a service fill and a full overhaul or dry fill, where the system is completely drained and refilled including all passages and the heater core.
  • For the 5.3 V8 in 2006-2009, the cooling system capacity narrows to 10.6-11.6 liters, a considerably tighter band compared to the 2003-2005 span, suggesting less variation between partial and full fill scenarios in the later configuration.
  • All four configurations share an identical change interval of 150,000 miles or 60 months under normal use conditions, placing the drain-and-fill cycle on a five-year or mileage-based schedule, whichever comes first.
  • A 12-month check interval applies across every listed configuration regardless of engine type or model year, meaning the cooling system is inspected on an annual basis between full change intervals.
  • The 4.2 24V engine in 2001-2005 models shows a capacity spread of 4.2 liters between its minimum and maximum values, which is notably larger than the 1.0-liter spread seen in the 2006-2009 version of the same engine.
  • The 5.3 V8 in 2003-2005 carries a maximum capacity of 17.0 liters, the highest single value across all four rows, indicating a substantially larger total coolant volume requirement under full-fill conditions for that engine and model year range.

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