Chevrolet Silverado 4500HD 2022 Owner's Manual page 369

Component
Rear Drive Axle(s) Mineral Oil
API MT-1, GL-5
Emgard 2986 Synthetic Lubricant.
Do not mix conventional (mineral bases) lube
with synthetic oil.
Terminals Lubricant 472141-C1
Sealing Grease
Connectors Dielectric NYOGEL 760 G
Grease
Component Vendor/Lubrication Type
Gear oil meeting MIL-PRF-2105E,
Viscosity
Rear Axle
75W
75W-80
75W-90
75W-140
80W-90
80W-140
85W-140
75W-90
Electrical
Service and Maintenance
Applicable Temperatures
40 °C to 26 °C ( 40 °F to 15 °F)
40 °C to 27 °C ( 40 °F to 80 °F)
40 °C to 38 °C ( 40 °F to 100 °F)
40 °C and above ( 40 °F and
above)
26 °C to 38 °C ( 15 °F to 100 °F)
26 °C and above ( 15 °F and above)
12 °C and above (10 °F and above)
All Temperatures
367