03-05 Chevrolet SSR the Automatic Head Lamps or DRL Are Intermittently Inoperative - kw brake disabled DRL GMT368 headlamp intermittent lamp light manual operation park switch

The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

The automatic head lamps or DRL are intermittently inoperative.

Below are some of the normal operating characteristics of the automatic head lamps (AHL) and the DRL, when the master lighting switch is in the auto position.

Models 2003, 2004, and 2005 built prior to 10/06/04 - Automatic transmission vehicles sold in the U.S.

1. Park in Dark Feature

Apply the park brake, then turn the ignition on. Results: The DRL/AHL are turned OFF. When the park brake is released, the DRL/AHL will turn ON. Note: If the park brake is pulled to the first click to try to defeat the DRL/AHL, and the truck is driven the DRL/AHL will turn on and stay on. The red brake light on the IPC will come on, and a warning chime will also sound when you start to drive.

2. Drive in Dark Feature

Turn the ignition on, then pull up on the park brake handle. Results: The DRL/AHL are turned OFF. When the park brake is released, the DRL/AHL will remain OFF. If the park brake handle is cycled Up then Down the DRL/AHL will turn back on. Note: if the TBC/BCM is replaced or reprogrammed for any reason, it may operate like a vehicle built after 10/29/04

Model 2005 built on or after 10/06/04 - Automatic transmission vehicles sold in the U.S.

1. Park in Dark Feature

Apply the park brake, then turn the ignition on. Results: The DRL/AHL are turned OFF. When the park brake is released, the DRL/AHL will turn ON. Note: If the park brake is pulled to the first click to try to defeat the DRL/AHL, and the truck is driven the DRL/AHL will turn on. When the truck senses vehicle speed the lights will turn on. The lights will turn back off when the vehicle is stopped. The red brake light on the IPC will come on, and a warning chime will also sound when you start to drive.

2. Drive in Dark Feature

Turn the ignition on, then pull up on the park brake handle. Results: The DRL/AHL are turned OFF. When the park brake is released, the DRL/AHL will remain OFF. If the park brake handle is cycled up, then down, the DRL/AHL will turn back on.

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Models 2003, 2004, and 2005 - Manual transmission vehicles sold in the U.S. or Export and automatic transmission vehicles sold for Export

1. Park in Dark Feature

Apply the park brake, then turn the ignition on. Results: The DRL/AHL are turned OFF. When the park brake is released, the DRL/AHL will turn ON. Note: If the park brake is pulled to the first click to try to defeat the DRL/AHL, and the truck is driven the DRL/AHL will turn on and stay on. The red brake light on the IPC will come on, and a warning chime will also sound when you start to drive.

2. Drive in Dark Feature (not a feature on the export vehicles)

Turn the ignition on, then pull up on the park brake handle. Results: The DRL/AHL will remain ON.

Note: For export and manual transmission vehicles; the DRLs are on even when the master light switch is in running light position.

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Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

(03-05 Chevrolet SSR)

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