Brake Caliper Housing, Caliper Support Spring and Caliper

Aeroshell #5 Grease or equivalent GM P/N 12377969, Canadian P/N 10953439.

Cab-Door Hinges and Latches

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

Chassis Lubricant

Chassis lubricant that meets the requirements of NLGI Brake 2, Category LB or GC-LB GM P/N 12377985.

Clutch Bearing Lubricant

Clutch Bearing Lubricant or NLGI #3 consistency GM P/N 12378484.

Exhaust Brake Ball Joint Cap Lubricant

High#-Temperature Grease or NLGI #3 consistency GM P/N 1051344, Canadian P/N 993037.

Front Wheel Bearings with Oil Filled hubs

SAE 75W-90 synthetic axle lubricant or equivalent GM P/N 12345841, Canadian P/N 10953512.

Engine Coolant

50/50 mixture of clean drinkable water and use only GM Goodwrench® DEX-COOL® or Havoline®. See "Engine Coolant" in the Index.

Engine Oil

Engine oil with the letters CH-4 or CG-4 is best for your 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) levels of quality. To determine the preferred viscosity for your vehicle's diesel engine, see "Engine Oil" in the Index.

Hydraulic Brake System

Delco Supreme II® brake fluid or equivalent DOT-3 brake fluid GM  P/N 12377967, Canadian P/N 992667.

Hydraulic Clutch System

Delco hydraulic clutch fluid or equivalent DOT-3 brake fluid with emission modifier GM P/N 12345347, Canadian P/N 10953517.

Power Steering System

GM Power Steering Fluid GM P/N 1050017-1   quart, 1052884-1   pint, Canadian P/N 992646 - 1 quart, 993294 - 1 pint or equivalent.

Propshafts and Splines

Wheel bearing lubricant that meets the requirements of NLGI Grade 2, Category GC or GC-LB or equivalent GM P/N 1051344, Canadian P/N 993037.

Rear Axle

SAE 75W-90 synthetic axle lubricant or equivalent GM P/N 12345841, Canadian P/N 10953512.

Front Wheel Bearings With Oil Filled Hub

SAE 75W-90 synthetic Axle Lubricant for Medium Duty Trucks or equivalent GM P/N 12345841, Canadian P/N 10953512.

Rear Axle Shift Motor Lubricant

Refrigerant Oil GM P/N 5416939, Canadian P/N 109535496.

Manual Transmission

Synthetic manual transmission fluid GM P/N 12345724, Canadian P/N 10953510.

Automatic

Refer to the Allison Transmission Operator's Manual for the correct transmission fluid.

Weatherstrip Conditioning

Dielectric Silicone grease or equivalent GM P/N 12345579, Canadian P/N 1974984.

Weatherstrip Squeaks

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

Wheel Bearing Grease

Wheel bearing lubricant that meets the requirements of NGLI Grade 2, Category GC or GC-LB or equivalent GM P/N 1051344, Canadian P/N 993037.

Windshield Washer Solvent

GM Optikleen® washer solvent or equivalent GM P/N 1051515, Canadian P/N 993033.