Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the logical successor to CHARM, I recommend you try it!

Link: lemon-manuals.la

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.