TrailBlazer 2WD L6-4.2L VIN S (2003)
1. Connect the coolant heater cord retainers (1) to the battery cover.
2. If equipped with a 5.3L engine, connect the coolant heater cord to the coolant heater (1).
3. Install the coolant heater cord clip to the engine harness.
4. If equipped with a 4.2L engine, install the coolant heater cord to the coolant heater (2).
5. Install the coolant heater cord to the engine harness bracket (1).
6. Install the PCM.