SERVICE INTERVALS
Manufacturer recommends changing the transfer case fluid every 15,000 miles when towing regularly.
CHECKING FLUID LEVELS
Remove the transfer case oil level/fill plug (2) from the transfer case. (Scheme 1) The oil level should be even with the bottom of the oil level/fill plug hole. Reinstall fill plug. Tighten to specification. See TORQUE SPECIFICATIONS.
Scheme 1
RECOMMENDED FLUIDS
Manufacturer recommends GM PN 12345977 (U.S.), GM PN 10953482 (Canada) or SAE 80W-90 GL-5 gear lubricant.
DRAINING & REFILLING
- Raise and support vehicle. Remove fill plug (2) and drain plug (1) from transfer case. (Scheme 1) Allow fluid to drain. Reinstall drain plug. Tighten to specification. See «TORQUE SPECIFICATIONS»(ref-155003-S17383434242003060400000).
- Fill transfer case through oil fill plug hole to specified capacity using recommended fluid. See «RECOMMENDED FLUIDS»(ref-155003-S21765178372003060400000). Ensure fluid is level with bottom edge of fill plug hole. Reinstall fill plug. Tighten to specification. See «TORQUE SPECIFICATIONS»(ref-155003-S17383434242003060400000).