System Specifications

Axle Fluid Type

Front Axle (8.25" in S4WD)
SAE 80W-90 Axle Lubricant GM P/N 89021671 (Canadian P/N 10953455)

Front Axle (8.25" in F4WD)
SAE 75W-90 Synthetic Axle Lubricant GM P/N 12378261 (Canadian P/N 10953455) or equivalent meeting GM Specification 9986115

Front Axle (9.25")
SAE 75W-90 Synthetic Axle Lubricant GM P/N 12378261 (Canadian P/N 10953455) or equivalent meeting GM Specification 9986115

Rear Axle
SAE 75W-90 Synthetic Axle Lubricant GM P/N 12378261 (Canadian P/N 10953455) or equivalent meeting GM Specification 9986115

Rear Axle (with NYS Quadrasteer Axle Only)
SAE 75W-90 Synthetic Axle Lubricant GM P/N 12378557 (Canadian P/N 88901362) or equivalent.
Do Not add friction modifier.