GMC 2009 Yukon XL Owner's Manual page 534

Usage Fluid/Lubricant
Front Axle SAE 75W-90 Synthetic
(2500 Series Axle Lubricant
Vehicles with (GM Part No. U.S. 89021677,
Four-Wheel in Canada 89021678) meeting
Drive) GM Specification 9986115.
SAE 75W-90 Synthetic
Axle Lubricant
Rear Axle (GM Part No. U.S. 89021677,
in Canada 89021678) meeting
GM Specification 9986115.
Transfer Case
DEXRON
(Four-Wheel
Transmission Fluid.
Drive)
Front Axle
Propshaft
Spline or Spline Lubricant, Special Lubricant
One-Piece (GM Part No. U.S. 12345879, in
Propshaft Canada 10953511) or lubricant
Spline meeting requirements of
(Two-Wheel GM 9985830.
Drive with
Auto. Trans.)
6-14
®
-VI Automatic
Usage Fluid/Lubricant
Multi-Purpose Lubricant, Superlube
Hood Hinges (GM Part No. U.S. 12346241,
in Canada 10953474).
Outer Tailgate Multi-Purpose Lubricant, Superlube
Handle Pivot (GM Part No. U.S. 12346241,
Points in Canada 10953474).
Weatherstrip Lubricant
(GM Part No. U.S. 3634770,
Weatherstrip in Canada 10953518) or
Conditioning Dielectric Silicone Grease
(GM Part No. U.S. 12345579,
in Canada 992887).
Synthetic Grease with
Weatherstrip Teflon, Superlube
Squeaks (GM Part No. U.S. 12371287,
in Canada 10953437).