GMC T-Series 1999 Owner's Manual page 322

USAGE FLUID/LUBRICANT
Rear Axle Shift Refrigerant Oil (GM Part
Motor Lubricant No. 5416939).
Propshafts and Wheel Bearing Lubricant meeting
Splines requirements of NLGI # 2,
Category GC or GC
Part No. 1051344 or equivalent).
--
Cab Door Multi
Hinges and Superlube
Latches 12346241 or equivalent).
7-60
-
LB (GM
-
Purpose Lubricant,
R
(GM Part No.
USAGE FLUID/LUBRICANT
Weatherstrip Dielectric Silicone Grease (GM
Conditioning Part No. 12345579 or equivalent).
Weatherstrip Synthetic Grease with Teflon,
Squeaks Superlube
12371287 or equivalent).
yellowblue
R
(GM Part No.