Subject: Info - Rear Axle Lubricant Compatibility and Usage #99-04-20-001 - (06/18/1999)





This bulletin is being issued to inform dealers about the compatibility and usage of the new Fuel Efficient SAE 75W-90 Synthetic Axle Lubricant, GM P/N 12378261 (In Canada use P/N 10953455), with current axles, and with the non-synthetic axle lubricant, GM P/N 1052271 (In Canada use P/N 10950849), for the rear axles on the above light-duty trucks.

just some info, but i dont know about non gm synethic axle lube, i have seen racing 90w synethic not atack rtv. the gm axle fluid is not uasable on a silicone axle, unless you want a leak.
gm synethic axle fluid is $25.00 a quart.
8.5/8.625=2qts
9.5/9.5ld=3qts
10.5=3.5qts
11.5=4qts