Chevrolet 2003 Silverado 1500 Pickup Owner's Manual page 518

Usage
Automatic
Transmission
Key Lock
Cylinders
Floor Shift
bin kage
Chassis
Lubrication
Front Axle
Rear Axle
Fluid/Lubricant
DEXRON-Ill Automatic Transmission
Fluid.
Mulit-Purpose Lubricant, Superlube
(GM Part No. U S . 12346241, in
Canada 10953474, or equivalent).
Lubriplate Lubricant Aerosol (GM
Part No. U.S. 12346293, in Canada
992723, or equivalent) or lubricant
meeting requirements of NLGl #2
Category LB or GC-LB.
Chassis Lubricant (GM Part No.
U.S. 12377985, in Canada
88901242, or equivalent) or lubricant
meeting requirements of NLGl #2,
Category LB or GC-LB.
SAE 80W-90 Axle Lubricant (GM
Part No. U.S. 1052271, in Canada
10950849 or equivalent).
SAE 75W-90 Synthetic Axle
Lubricant (GM Part No. U.S.
12378261, in Canada 10953455) or
equivalent meeting GM Specification
99861 15.
Usage
Rear Axle
(Steerable)
Manual
Transfer Case
Automatic
Transfer Case
Front Axle
Propshaft
Spline or
One-Piece
Propshaft
Spline
(Two-Wheel
Drive with Auto.
Trans.)
Rear Driveline
Center Spline
Fluid/Lubricant
Synthetic Axle Lubricant; use only
GM Part No. 12378557 (in Canada,
88901362). Do not add friction
modifier.
DEXRON-Ill Automatic Transmission
Fluid.
AUTO-TRAK I1 Fluid (GM Part No.
U S . 12378508, in Canada
10953626).
Spline Lubricant, Special Lubricant
(GM Part No. U.S. 12345879, in
Canada IO95351 1) or lubricant
meeting requirements of GM
9985830.
Chassis Lubricant (GM Part No.
U.S. 12377985, in Canada
88901242, or equivalent) or lubricant
meeting requirements of NLGl #2,
Category LB or GC-LB.
6-1 9