System Specifications

Fluid Types

Differential Fluid

Front SAE 75W-90 Synthetic Axle Lubricant (Part No 89021677)
Rear Axle (4.2L/5.3L)* SAE 75W-90 Synthetic Axle Lubricant (Part No 89021677)
Rear Axle (6.0L)** SAE 75W-90 Synthetic Axle Lubricant (Part No 89021677)

*With a complete drain/fill, if using GM synthetic axle lubricant P/N 89021677, add 118 ml (4.0 oz) of limited slip axle lubricant additive to the axle. If using DEXRON LS gear oil P/N 88862624, DO NOT add the limited slip additive to the axle.

**With a complete drain/fill, if using GM synthetic axle lubricant P/N 89021677, add 163 ml (5.5 oz) of limited slip axle lubricant additive to the axle. If using DEXRON LS gear oil P/N 88862624, DO NOT add the limited slip additive to the axle.