Chevrolet Silverado 4500HD 2022 Owner's Manual page 349

Caution
Use of the incorrect fluids and lubricants
may damage the vehicle and the
damages may not be covered by the
vehicle warranty. Always use the correct
fluids and lubricants. See Recommended
Fluids and Lubricants 0 363.
Wipe clean all dirt and debris from grease
fittings before applying grease. If the fitting
is not cleaned, dirt can be pushed into the
component with the grease. Always fill
grease to the point where old grease and
contaminants are forced out from the part
and only new grease comes out. If a fitting
does not accept lubrication due to damage
or internal stoppage, replace with a new
fitting. Remove excess grease from fittings
and other surfaces after applying grease.
Service and Maintenance 347