Sierra 1500 4WD V8-5.3L VIN Z Flex Fuel (2005)
Fluid - Differential: Fluid Type Specifications
DIFFERENTIAL FLUID
Front Axle - Four-Wheel Drive
SAE 80W-90 Axle Lubricant (GM Part No. U.S. 1052271, in Canada 10950849).
Front Axle - All-Wheel Drive
SAE 75W-90 Synthetic Axle Lubricant (GM Part No. U.S. 12378261, in Canada 10953455) meeting GM Specification 9986115.
Rear Axle
SAE 75W-90 Synthetic Axle Lubricant (GM Part No. U.S. 12378261, in Canada 10953455) meeting GM Specification 9986115.
Rear Axle - Steerable
Synthetic Axle Lubricant; use only GM Part No. U.S. 12378557, in Canada 88901362.Do not add friction modifier.
