Control Units
CONTROL UNITS LOCATION
| Component | Location | |
|---|---|---|
| ABS Module | Mounted on side of brake master cylinder. | |
| A/C Control/Front & Rear Heater Control Logic Module (Dual System) | Above overhead console. | |
| A/C & Heater Control Logic Module (Single System) | In dash, behind instrument panel. | |
| Audio Alarm Module | On convenience center. | |
| Check Engine Light Driver Module (6.2L) | Under right side of dash, above blower motor. | |
| Cruise Control Module | On left side of firewall, near brake booster. | |
| Daytime Running Lights (DRL) Module | Behind left side of dash. | |
| Diesel Elec. Control (DEC) Module (6.2L Diesel) | Behind right side of dash. See Figure . | |
| Electronic Control Module (ECM) | ||
| 4.3L | Behind right side of dash, above blower motor. See Figure . | |
| 5.0L & 5.7L | Behind right side of dash, above blower motor. See Figure . | |
| 7.4L | Behind right side of dash, above blower motor. See Figure . | |
| 5.7L (CNG) | Behind right side of dash, above blower motor. See Figure . | |
| Elec. Spark Control (ESC) Module | ||
| 4.3L | On right side of engine, on valve cover. See Figure . | |
| 5.0L & 5.7L | On right side of engine, on valve cover. See Figure . | |
| 7.4L | On right side of engine, on valve cover. See Figure . | |
| Fuel Module | ||
| 5.0L, 5.7L & 5.7L HD | Behind right side of dash. See Figure . | |
| 7.4L | Behind left side of dash, behind brake booster. See Figure . | |
| Glow Plug Controller (6.2L) | On left rear of intake manifold. | |
| Hot Fuel Handling Module (5.7L & 7.4L) | Behind right side of dash, above blower motor. | |
| Low Coolant Module (6.2L) | On center of firewall. | |
| Powertrain Control Module (PCM) | Behind right side of dash, above blower motor. | |
| Transmission Control Module (TCM) | Behind right side of dash. | |
| Windshield Wiper Motor Module | On firewall, behind wiper motor. | |