System Specifications

FRONT AXLE (1500 SERIES)
SAE 80W-90 Axle Lubricant (GM Part No. U.S. 1052271, in Canada 10950849).

FRONT AXLE (1500 HD, 2500, 2500 HD, AND 3500 SERIES)
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.