Pontiac Bonneville (USA / CAN)
Coolant capacity & service interval
Pontiac Bonneville (USA / CAN) coolant capacity ranges from 9,5 to 12,3 liters. The service interval is 240000 km. The data covers 3 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| Bonneville 4.6 V8 32V (2004-2005) |
|
| Bonneville 3.8 V6 (1999-2005) |
|
| Bonneville 3.8 V6 Supercharged (1999-2004) |
|
Additional Notes
- The Pontiac Bonneville 3.8 V6 carries a cooling system capacity of 9.5 liters, a figure consistent with a standard six-cylinder engine block and associated passages filled during a service fill procedure.
- The 3.8 V6 Supercharged shares the same 9.5-liter cooling system capacity as the naturally aspirated 3.8 V6, indicating the supercharger addition did not meaningfully alter the total coolant volume required.
- The 4.6 V8 32V, introduced for 2004-2005, carries a notably larger cooling system capacity of 12.3 liters, reflecting the greater thermal demands and larger engine displacement of a 32-valve V8 compared to the V6 configurations.
- Across all three engine configurations, the specified coolant change interval is 240,000 km under normal use conditions, a figure associated with long-life coolant formulations such as DEX-COOL, which was standard in General Motors vehicles of the era.
- The 3.8 V6 and 3.8 V6 Supercharged share identical cooling system specifications across the 1999-2005 and 1999-2004 model year ranges respectively, meaning no capacity or interval differentiation exists between the forced-induction and non-forced-induction variants of the same engine family.
- The 2.8-liter difference in cooling system capacity between the 3.8 V6 at 9.5 liters and the 4.6 V8 32V at 12.3 liters represents a roughly 29 percent increase, which is a meaningful distinction when calculating the total volume of coolant required for a full system drain and refill.