October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Fluid Type Specifications

FRONT AXLE (1500 SERIES)
SAE 80W-90 Axle Lubricant (GM Part No. U.S. 89021671, in Canada 89021672).

FRONT AXLE (2500 SERIES)
SAE 75W-90 Synthetic Axle Lubricant (GM Part No. U.S. 89021677, in Canada 89021678) meeting GM Specification 9986115.

REAR AXLE
SAE 75W-90 Synthetic Axle Lubricant (GM Part No. U.S. 89021677, in Canada 89021678) meeting GM Specification 9986115.