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System 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.