GMC Chevrolet Express 2022 Owner's Manual page 230

Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
Fluids and lubricants identified below by name or specification, including fluids or lubricants not listed here, can be obtained from your dealer.
Usage
Automatic Transmission
Chassis Lubrication, Parking Brake Cable
Guides
Engine Coolant
Engine Oil
Front Wheel Bearings
Hydraulic Brake System
Key Lock Cylinders, Hood Hinges
Power Steering System
Rear Axle
Windshield Washer
DEXRON-VI Automatic Transmission Fluid.
Chassis lubricant meeting requirements of NLGI #2, Category LB or GC-LB.
50/50 mixture of clean, drinkable water and use only DEX-COOL Coolant. See Cooling System
0 173.
Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1
full synthetic is recommended. See Engine Oil 0 169.
Wheel bearing lubricant meeting requirements of NLGI #2, Category GC or GC-LB.
DOT 4 Hydraulic Brake Fluid.
Multi-Purpose Lubricant, Superlube. See your dealer.
GM Power Steering Fluid. See your dealer.
See your dealer.
Automotive windshield washer fluid that meets regional freeze protection requirements.
Service and Maintenance
Fluid/Lubricant
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