GMC C4500 owners have reported 2 exterior lighting related problems since 1996. Table 1 shows the 2 most common exterior lighting problems. The number one most common problem is related to the vehicle's headlights (1 problem). The second most common problem is related to the vehicle's hazard flashing warning light (1 problem). For details of each of the problem category, use the links in the table.
| Problem Category | Number of Problems |
|---|---|
| Headlights problems | |
| Hazard Flashing Warning Light problems |
When the vehicle reached a speed of 50 mph, the head lights dimmed. When the lights are adjusted properly, they do not allow the proper light on the road at speeds greater than 50 mph. Dealer did not see the problem. Scc Read details...
When brakes are applied, the emergency lights stop working. Had a flat tire and pushed the emergency lights and used brakes to slow down and no one was aware that I had an emergency. Read details...