Automatic Transfer Case (NP8 Only)

AUTO-TRAK® II Fluid GM P/N 12378508 (Canadian P/N 10953626)

Engine Oil

Engine oil with the American Petroleum Institute Certified For Gasoline Engines STARBURST symbol of the proper viscosity. To determine the preferred viscosity for this vehicle's engine, refer to Explanation of Scheduled Services .

Engine Oil (Diesel Engine)

Engine oil with the letters CH-4 or CG-4 is best for this vehicle. The CH-4 or CG-4 designation may appear either alone, or in combination with other API designations, such as API CH-4/SJ, CG-4/SH or CH-4/CG-4/SJ. These letters show American Petroleum Institute (API) level of quality.

To determine the preferred viscosity for this vehicle's engine, refer to Explanation of Scheduled Services .

Engine Coolant

50/50 mixture of clean drinkable water and use only GM Goodwrench® DEX-COOL® or Havoline® DEX-COOL® coolant

Hydraulic Brake System

Delco Supreme 11® Brake Fluid GM P/N 12377967 (Canadian P/N 992667) or equivalent DOT-3 brake fluid

Windshield Washer Solvent

GM Optikleen ® Washer Solvent GM P/N 1051515 (Canadian P/N 993033) or equivalent

Hydraulic Clutch System (5-Speed Trans.)

Hydraulic Clutch Fluid GM P/N 12345347 (Canadian P/N 10953517) or equivalent DOT-3 brake fluid

Hydraulic Clutch System (6-Speed Trans.)

Hydraulic Clutch Fluid GM P/N 88958860 (Canadian P/N  88901244)

Power Steering System

GM Power Steering Fluid GM  P/N 1052884 - 1 pint, 1050017 - 1 quart, (Canadian P/N 993294 - 1 pint, 993353 - 1 quart) or equivalent

Manual Transmission (5-Speed with Low Gear, RPO MW3)

GM Goodwrench Synthetic Manual Transmission Fluid GM P/N 12346190 (Canadian P/N 10953477) or equivalent SAE 75W-85 GL-4 gear oil

Manual Transmission (5-Speed without Low Gear, RPO MG5)

Synchromesh Transmission Fluid GM P/N 12345349 (Canadian P/N 10953465) or equivalent

Manual Transmission (6-Speed)

TransSynd ™ Synthetic Automatic Transmission Fluid GM  P/N 12378515 (Canadian P/N 88900701)

Automatic Transmission

DEXRON®-VI, Automatic Transmission Fluid

Key Lock Cylinders

Multi-Purpose Lubricant, Superlube® GM P/N 12346241 (Canadian P/N 10953474) or equivalent

Floor Shift Linkage

Lubriplate® Lubricant Aerosol GM P/N 1052349 (Canadian P/N 992723) or equivalent or lubricant meeting requirements of NLGI # 2 Category LB or GC-LB

Chassis Lubrication

Chassis Lubricant GM P/N 12377985 or equivalent or lubricant meeting requirements of NLGI # 2 Category LB or GC-LB

Front Axle (S4WD)

SAE 80W-90 Axle Lubricant GM P/N 89021671 (Canadian P/N 10950849) or equivalent

Front Axle (F4WD and all 9.25)

SAE 75W-90 Synthetic Axle Lubricant GM P/N 12378261 (Canadian P/N 10953455) or equivalent meeting GM Specification 9986115

Rear Axle

SAE 75W-90 Synthetic Axle Lubricant GM P/N 12378261 (Canadian P/N 10953455) or equivalent meeting GM Specification 9986115

Rear Axle (Steering 4-Wheel)

Synthetic Axle Lubricant; use only GM PN 12378557 (Canadian PN 88901362).

Do Not add friction modifier.

Manual Transfer Case (NP1, NP2, and NP3)

Use Manual Transmission Fluid GM P/N 88861800 (Canadian P/N 88861801)

Front Axle Propshaft Spline or One-Piece Propshaft Spline (Two-Wheel Drive with Auto. Trans.)

Spline Lubricant, Special Lubricant GM P/N 12345879 (Canadian P/N 10953511) or lubricant meeting requirements of GM 9985830

Rear Drive line Center Spline

Chassis Lubricant GM P/N 12377985 or equivalent or lubricant meeting requirements of NLGI # 2, Category LB or GC-LB

Hood Hinges

Multi-Purpose lubricant, Superlube® GM P/N 12346241 (Canadian P/N 10953474) or equivalent

Body Door Hinge Pins, Tailgate Hinge and Linkage, Folding Seat and Fuel Door Hinge

Multi-Purpose lubricant, Superlube® GM P/N 12346241 (Canadian P/N 10953474) or equivalent

Outer Tailgate Handle Pivot Points, Hinges, Latch Bolt and Linkage

Multi-Purpose lubricant, Superlube® GM P/N 12346241 (Canadian P/N 10953474) or equivalent

Weatherstrip Conditioning

Dielectric Silicone Grease GM P/N 12345579 (Canadian P/N 1974984) or equivalent

Weatherstrip Squeaks

Synthetic Grease with Teflon, Superlube® GM P/N 12371287 (Canadian P/N 10953437) or equivalent