Usage Fluid/Lubricant
Front Axle
(2500 Series
Vehicles with Four-Wheel Drive) SAE 75W-90 Synthetic Axle Lubricant
(GM Part No. U.S. 89021677,
in Canada 89021678).
Rear Axle SAE 75W-90 Synthetic Axle Lubricant
(GM Part No. U.S. 89021677,
in Canada 89021678).
Transfer Case (Four‐Wheel Drive) DEXRON
®-VI Automatic Transmission
Fluid.
Front Axle
Propshaft Spline
or One-Piece
Propshaft Spline (Two-Wheel
Drive with Auto. Trans.) Spline Lubricant, Special Lubricant
(GM Part No. U.S. 12345879,
in Canada 10953511).
Usage Fluid/Lubricant
Hood Hinges
Multi-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241,
in Canada 10953474).
Outer Tailgate Handle Pivot
Points Multi-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241,
in Canada 10953474).
Weatherstrip Conditioning Weatherstrip Lubricant
(GM Part No. U.S. 3634770,
in Canada 10953518) or
Dielectric Silicone Grease
(GM Part No. U.S. 12345579,
in Canada 992887).
Weatherstrip Squeaks Synthetic Grease with
Teflon, Superlube
(GM Part No. U.S. 12371287,
in Canada 10953437).
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