Pontiac G6 (USA / CAN)

Coolant capacity & service interval

Pontiac G6 (USA / CAN) coolant capacity ranges from 7,1 to 9,4 liters. Service intervals require a change every 150000 miles or 60 months. The data covers 5 configurations.

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

TypeSpecifications
G6 2.4 (2006-2009)
  • Use: Normal
  • Capacity 7,1 liter
  • Change 150000 miles/ 60 months
G6 3.5 V6 (2006-2009)
  • Use: Normal
  • Capacity 9,2 liter
  • Change 150000 miles/ 60 months
G6 3.6 V6 24V (2006-2009)
  • Use: Normal
  • Capacity 9,2 liter
  • Change 150000 miles/ 60 months
G6 3.9 V6 (2006-2009)
  • Use: Normal
  • Capacity 9,2 liter
  • Change 150000 miles/ 60 months
G6 3.5 GT (2005-2006)
  • Use: Normal
  • Capacity 9,4 liter
  • Change 150000 miles/ 60 months

Additional Notes

  • The Pontiac G6 2.4 carries a cooling system capacity of 7.1 liters, the smallest figure across all listed engine configurations, which reflects the comparatively compact displacement of the inline four-cylinder relative to the V6 variants.
  • The G6 3.5 GT, covering model years 2005-2006, holds a cooling system capacity of 9.4 liters, the largest of any configuration in the specifications, setting it apart from the 9.2-liter figure shared by the other V6 engines.
  • The G6 3.5 V6, 3.6 V6 24V, and 3.9 V6 each share an identical cooling system capacity of 9.2 liters across the 2006-2009 model years, despite differences in displacement and valve configuration among the three engines.
  • All five configurations carry a uniform service interval of 150,000 miles or 60 months under normal use conditions, placing the coolant change interval on a long-life schedule rather than a conventional short-cycle one.
  • The 60-month time limit on the coolant change interval means a calendar-based threshold applies alongside the mileage figure, so whichever of the two is reached first would govern the service point under normal use conditions.
  • The 2.4 engine spans 2006-2009, meaning no four-cylinder coolant specification is listed for the 2005 model year, which is covered only by the 3.5 GT V6 entry in the available data.
  • The capacity difference between the 3.5 GT at 9.4 liters and the later 3.5 V6 at 9.2 liters, despite both being 3.5-liter engines, suggests a variation in cooling system design or routing between the GT trim and the standard V6 application.

Other Systems