Intake Air Heater Replacement for GMC Truck TopKick C-Series (Conventional) C4/C5 2003

1. Remove the engine cover. Refer to Engine Cover Replacement in Interior Trim.
2. Remove the air cleaner layer. Refer to Air Cleaner Replacement .



3. Remove the intake air heater harness connector nut.
4. Remove the intake air heater from the inlet pipe.

Notice: Refer to Fastener Notice in the Preface section.

1. Install the intake air heater in the inlet pipe.

Tighten
Tighten the intake air heater to 50 N·m (37 lb ft).




2. Connect the intake air heater harness connector.

Tighten
Tighten the air intake heater electrical nut to 5 N·m (44 lb in).

3. Install the air cleaner layer. Refer to Air Cleaner Replacement .
4. Install the engine cover. Refer to Engine Cover Replacement in Interior Trim.