Transfer Case - Servicing: Maintenance GMC Savana H2500

SERVICE INTERVALS

Every 12 months, or at engine oil change intervals, check front axle and transfer case and add lubricant when necessary. A fluid loss could indicate a problem. Check and have it repaired, if needed. Check vent hose at transfer case for kinks and proper installation.

CHECKING FLUID LEVELS

1. Raise and support vehicle. Remove filler plug located on rear of transfer case.
2. Ensure fluid is level with bottom edge of filler plug hole.
3. Fill transfer case through oil filler plug hole to specified capacity using recommended fluid. See «RECOMMENDED FLUIDS»(ref-155005-S26948940032003060400000) .
4. Install the fill plug. Apply pipe sealant (P/N-12346004) to the threads on the fill plug. Tighten to specification. See «TORQUE SPECIFICATIONS»(ref-155005-S11503406252003060400000) .

RECOMMENDED FLUIDS

TRANSFER CASE FLUID TYPE

DRAINING & REFILLING

Note. When performing the following service procedures, use only hand tools to remove and install the fill or drain plugs.

Scheme 17

1. Raise and support vehicle.
2. Remove filler plug located on rear of transfer case. NOTE: When draining transfer case, make sure that an approved drain pan is used.
3. Remove drain plug from bottom of transfer case. Allow fluid to drain. (Scheme 17)
4. Replace drain plug, apply pipe sealant (P/N-12346004) to the threads on the drain plug. (Scheme 17) Tighten drain plug to specification. See «TORQUE SPECIFICATIONS»(ref-155005-S11503406252003060400000).
5. Fill transfer case through oil filler plug hole to specified capacity using recommended fluid. See «RECOMMENDED FLUIDS»(ref-155005-S26948940032003060400000). Ensure fluid is level with bottom edge of filler plug hole.
6. Install the fill plug. Apply pipe sealant (P/N-12346004) to the threads on the fill plug. Tighten to specification. See «TORQUE SPECIFICATIONS»(ref-155005-S11503406252003060400000).
7. Disconnect the electrical connector from the speed sensor.
8. Remove the speed sensor and the O-ring from the transfer case.
9. Add 1.0 Liter (1.06 quarts) of DEXRON®VI fluid, P/N 88861003 (in Canada, P/N 88861004) through the threaded speed sensor opening.
10. Install the speed sensor into the transfer case with the new O-ring seal. See «TORQUE SPECIFICATIONS»(ref-155005-S11503406252003060400000).
11. Connect the electrical connector to the speed sensor.
12. Lower the vehicle.