Hummer H3 (USA / CAN)
Transfer case fluid capacity & service interval
Hummer H3 (USA / CAN) requires 1,5 liters of transfer case fluid. Service intervals include 80000 km/ 24 months and 80000 km. The data covers 3 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| H3 5.3 V8 (2008-2010) |
|
| H3 3.7 (2007-2010) |
|
| H3 3.5 (2005-2007) |
|
Additional Notes
- All three engine configurations of the Hummer H3 (USA / CAN) share an identical transfer case fluid capacity of 1.5 liters, which is a typical service fill volume for a part-time or active transfer case unit of this class.
- The 3.5-liter four-cylinder, covering model years 2005-2007, carries a transfer case service interval of 80,000 km or 24 months, whichever comes first, under normal use conditions.
- The 3.7-liter four-cylinder, introduced for 2007 and running through 2010, mirrors the same 80,000 km / 24-month dual-trigger interval under normal use conditions as the earlier 3.5-liter engine.
- The 5.3 V8, available from 2008-2010, shares the 80,000 km distance interval but does not carry the 24-month time-based trigger that applies to the two four-cylinder configurations.
- The absence of a time-based interval for the 5.3 V8 means the fluid change schedule for that engine is governed solely by distance accumulated under normal use, rather than by a combined distance-or-time criterion.
- A 1.5-liter transfer case capacity is consistent with a service refill rather than a full overhaul fill, as overhaul procedures on units of this type typically account for additional fluid retained in passages and the torque-sensing clutch pack assembly.
- The overlap year of 2007 is notable in that both the 3.5-liter and the 3.7-liter engines were available, yet both share the same 1.5-liter capacity and 80,000 km / 24-month interval, indicating no change in transfer case specification between those two powertrains for that model year.