Chevrolet 4500 HD 2023 Manual page 114

Installing the Outside Air Filter
Install the filter in the reverse order to
removal.
Ensure that the filter is returned securely to
its original position. Failure to observe this
precaution can lead to rattling during travel.
The vehicle must not be used with the filter
removed or incorrectly installed. Failure to
observe this precaution can lead to air
conditioning system damage as a result of
dust, dirt, water, snow, and the like entering
the system.
Service
The air conditioning system will not be able
to cool the cab interior effectively if the
refrigerant level is low. Accordingly, the
refrigerant level must be topped up
whenever necessary.
Please contact your dealer whenever
refrigerant must be added.
Operation Tips
Operating the air conditioning while the
refrigerant level is too low leads not only to
poor cooling performance but also to air
conditioning system damage.
This vehicle uses the new refrigerant
HFC134a (R134a) in the air conditioning
system. No other type of refrigerant can be
used. In order to protect the environment,
care must be taken to ensure that
refrigerant gas is never released into open
air. When refrigerant must be replaced,
therefore, please contact your dealer or
other service facility equipped with a gas
recovery installation system.
Climate Controls 113