GMC 1999 Suburban, Owner'S Manual, Page: 395 / 424

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USAGE FLUID/LUBRICANT
Front and Rear
Axle (Standard
Differential) SAE 80W-90 Axle Lubricant (GM
Part No. 1052271 or equivalent).
Rear Axle
(Locking
Differential) SAE 80W-90 Axle Lubricant; Use
only GM Part No. 1052271. Do
not add friction modifier.
Manual Transfer
Case DEXRON
R
-
III Automatic
Transmission Fluid.
Automatic
Transfer Case Automatic Transfer Case Fluid
(GM Part No. 12378396).
Front Axle
Propshaft Spline
and Universal
Joints Chassis Lubricant (GM Part
No. 12377985 or equivalent) or
lubricant meeting requirements
of NLGI # 2, Category LB or
GC
-
LB.
One
-
Piece
Propshaft Spline
(With Two
-
Wheel
Drive)
Spline Lubricant, Special
Lubricant (GM Part
No. 12345879) or lubricant
meeting requirements of
GM 9985830.
USAGE FLUID/LUBRICANT
Hood Latch
Assembly,
Secondary Latch,
Pivots, Spring
Anchor and
Release Pawl Lubriplate
R
Lubricant Aerosol
(GM Part No. 12346293 or
equivalent) or lubricant meeting
requirements of NLGI # 2,
Category LB or GC
-
LB.
Hood and Door
Hinges Multi
-
Purpose Lubricant,
Superlube
R
(GM Part No.
12346241 or equivalent).
Body Door
Hinge Pins,
Tailgate Hinge
and Linkage,
Folding Seat and
Fuel Door Hinge Multi
-
Purpose Lubricant,
Superlube
R
(GM Part
No. 12346241 or equivalent).
Outer Tailgate
Handle Pivot
Points Multi
-
Purpose Lubricant,
Superlube
R
(GM Part
No. 12346241 or equivalent).
Weatherstrip
Conditioning Dielectric Silicone Grease (GM
Part No. 12345579 or equivalent).
Weatherstrip
Squeaks Synthetic Grease with Teflon,
Superlube
R
(GM Part
No. 12371287 or equivalent).