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 your vehicle's engine, see "Engine Oil" in the Index.

Engine Oil - Caterpillar Diesel Engine

See the Caterpillar® Operation & Maintenance Manual for engine oil recommendations.

Engine Coolant - GM Gasoline Engine

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

Engine Coolant - Caterpillar Diesel Engine

See the Caterpillar® Operation & Maintenance Manual for engine coolant recommendations.

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

Clutch Bearing Lubricant

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

Exhaust Brake Ball Joint Cap Lubricant

High-Temperature Grease - GM P/N 1051344 (Canadian P/N 993037) or equivalent or NLGI #3 consistency

Spring Parking Brake Hydraulic Pump

DEXRON®III Automatic Transmission Fluid

Brake Caliper Housing, Caliper Support Spring and Caliper Support Key

Aeroshell #5 Grease - GM P/N 12377969 (Canadian P/N 10953439) or equivalent

Power Steering System

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

Manual Transmission

Synthetic Manual Transmission Fluid - GM P/N 12345724 (Canadian P/N 10953510) is the recommended lubricant to use.

Automatic Transmission

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

Chassis Lubrication

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

Wheel Bearing Grease

Wheel bearing lubricant meeting requirements of NLGI #2, Category GC or GC-LB - GM P/N 1051344 (Canadian P/N 993037) or equivalent

Font Wheel Bearings with Oil Filled Hubs

SAE 75W-90 Synthetic Axle Lubricant for Medium Duty Trucks - GM P/N 12345841 (Canadian P/N 10953512) or equivalent

Rear Axle

SAE 75W-90 Synthetic Axle Lubricant for Medium Duty Trucks - GM P/N 12345841 (Canadian P/N 10953512) or equivalent

Rear Axle Shift Motor Lubricant

Refrigerant Oi l- GM P/N 5416939 (Canadian P/N 10953496)

Propshafts and Splines

Wheel Bearing lubricant meeting requirements of NLGI #2, Category GC or GC-LB - GM P/N 1051344 (Canadian P/N 993037) or equivalent