Silverado SS AWD V8-6.0L VIN N (2003)
Fluid - Differential: Fluid Type Specifications
Front Drive Axle
FRONT DRIVE AXLE LUBRICANT
8.25" S4WD Axle ......................................................................................................... SAE 80W-90 GL5 GM P/N 89021671 (Canadian P/N 10950849).
8.25" F4WD Axle ............ SAE 75W-90 Synthetic Axle Lubricant GM P/N 89021677 or equivalent meeting GM Specification 9986115 (Canadian P/N
89021678).
9.25" Axle ....................... SAE 75W-90 Synthetic Axle Lubricant GM P/N 89021677 or equivalent meeting GM Specification 9986115 (Canadian P/N
89021678).
Rear Drive Axle
REAR DRIVE AXLE LUBRICANT
All Except 9.75" Axle ................ SAE 75W-90 Synthetic Axle Lubricant 12378261 (Canadian P/N 10953455) or equivalent meeting GM Specification
9986115.
9.75" Steerable Axle ....................................................................................... Synthetic Axle Lubricant, use ONLY 12378557 (Canadian P/N 88901362).