Headlights — Headlight circuit, composite with drl GMC C3500 HD
All systems — 60 systems
- Air conditioning 2
- Air conditioning 5.7l 5
- Air conditioning 6.5l 4
- Air conditioning 7.4l 5
- Anti-lock brakes 5
- Anti-lock brakes 5.7l
- Anti-lock brakes 6.5l
- Anti-lock brakes 7.4l
- Anti-theft 4
- Computer data lines 2
- Computer data lines 4.3l
- Computer data lines 5.0l 2
- Computer data lines 5.7l 4
- Computer data lines 6.5l 3
- Computer data lines 7.4l
- Cooling fan
- Cooling fan 5.7l
- Cooling fan 7.4l
- Cruise control 4.3l
- Cruise control 5.0l
- Cruise control 5.7l 2
- Cruise control 6.5l 3
- Cruise control 7.4l 2
- Defoggers
- Electronic power steering
- Engine performance 4.3l 2
- Engine performance 5.0l 2
- Engine performance 5.7l 4
- Engine performance 6.5l 13
- Engine performance 7.4l 3
- Exterior lights 6
- Ground distribution
- Headlights 13
- Horn
- Instrument cluster 2
- Instrument cluster 5.7l
- Instrument cluster 6.5l
- Instrument cluster 7.4l
- Interior lights 13
- Power distribution 3
- Power door locks 12
- Power mirrors 4
- Power seats 11
- Power windows 4
- Radio 5
- Shift interlocks
- Starting/charging 2
- Starting/charging 4.3l 2
- Starting/charging 5.0l 2
- Starting/charging 5.7l 4
- Starting/charging 6.5l 6
- Starting/charging 7.4l 4
- Supplemental restraints
- Transmission 4.3l 4
- Transmission 5.0l 3
- Transmission 5.7l 10
- Transmission 6.5l 11
- Transmission 7.4l 6
- Warning systems 3
- Wiper/washer 3
