Auxiliary Air Compressor Filter Replacement for GMC Truck TopKick C-Series (Conventional) C4/C5 2004

Important: The auxiliary air filter is located within the air compressor assembly.

1. Remove the auxiliary air compressor. Refer to Auxiliary Air Compressor Replacement .
2. Remove the air inlet hose from the air compressor to the filter.
3. Remove the air outlet hose from the air filter.
4. Remove the air filter from the air inlet hose.

1. Connect the air filter outlet hose to the air filter.
2. Connect the air filter to the air inlet hose.
3. Connect the air compressor air inlet hose to the air compressor.
4. Install the auxiliary air compressor. Refer to Auxiliary Air Compressor Replacement .