Chevrolet 2012 Tahoe Owner's Manual page 463

Service and Maintenance 11-13
Usage Fluid/Lubricant
Front Axle (2500 Series Vehicles with SAE 75W-90 Synthetic Axle Lubricant (GM Part No. 89021677, in
Four-Wheel Drive) Canada 89021678).
SAE 75W-90 Synthetic Axle Lubricant (GM Part No. 89021677, in
Rear Axle
Canada 89021678).
®
Transfer Case (Four Wheel Drive) DEXRON -VI Automatic Transmission Fluid.
Front Axle Propshaft Spline or
Spline Lubricant, Special Lubricant (GM Part No. 12345879, in
One-Piece Propshaft Spline
Canada 10953511).
(Two-Wheel Drive with Auto. Trans.)
Multi-Purpose Lubricant, Superlube (GM Part No. 12346241, in
Hood Hinges
Canada 10953474).
Multi-Purpose Lubricant, Superlube (GM Part No. 12346241, in
Outer Tailgate Handle Pivot Points
Canada 10953474).
Weatherstrip Lubricant (GM Part No. 3634770, in Canada 10953518) or
Weatherstrip Conditioning
Dielectric Silicone Grease (GM Part No. 12345579, in Canada 992887).
Synthetic Grease with Teflon, Superlube (GM Part No. 12371287, in
Weatherstrip Squeaks
Canada 10953437).