GMC HUMMER EV 2023 Owner's Manual page 362

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
Electric Drive Unit
Hydraulic Brake System
Key Lock Cylinders, Hood and Tailgate/Swing
Gate Hinges
Vehicle Coolant Circuits
Windshield Washer
DEXRON ULV Automatic Transmission Fluid.
GM approved DOT 4 Hydraulic Brake Fluid.
Multi-Purpose Lubricant, Superlube. See your dealer.
Use only ACDelco Premix (50/50 mixture of de-ionized water and DEX-COOL Coolant). See
your dealer.
Automotive windshield washer fluid that meets regional freeze protection requirements.
Service and Maintenance
Fluid/Lubricant
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