GMC 2001 C3 Owner's Manual page 371

USAGE FLUID/LUBRICANT
Chassis Chassis Lubricant (GM Part
Lubrication No. 12377985 or equivalent) or
lubricant meeting requirements
of NLGI # 2, Category LB
or GC
Front and SAE 75W
Rear Axle Lubricant (GM Part
No. 12378261) or
equivalent meeting
GM Specification 9986115.
Transfer Case DEXRON
Transmission Fluid.
7-24
-
LB.
-
90 Synthetic Axle
R
-
III Automatic
USAGE FLUID/LUBRICANT
Front Axle Spline Lubricant, Special
Propshaft Spline Lubricant (GM Part
No. 12345879) or lubricant
meeting requirements
of GM 9985830.
Rear Driveline Chassis Lubricant (GM Part
Center Spline No. 12377985 or equivalent)
or lubricant meeting requirements
of NLGI # 2, Category LB
or GC
Hood Latch Lubriplate
Assembly, (GM Part No. 12346293 or
Secondary Latch, equivalent) or lubricant meeting
Pivots, Spring requirements of NLGI # 2,
Anchor and Category LB or GC
Release Pawl
-
LB.
R
Lubricant Aerosol
-
LB.