Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2002 Cadillac Escalade EXTFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Blower Motor Control Processor (Pickup) | Behind right side of dash, on HVAC assembly. |
| Blower Motor Control Processor (Utility) | Behind dash, below radio. |
| Body Control Module (BCM) | On lower left side of dash, below steering column. |
| Compressor/Leveling Module (RTD) | At rear of vehicle, on crossmember frame rail. |
| Courtesy Lamp Module (Utility) | Behind headlight switch, taped to harness. |
| Cruise Control Module | In left rear of engine compartment, on firewall. |
| Electronic Brake Control Module (EBCM) | On left side of the inner frame. |
| Engine Control Module (ECM) (6.6L VIN 1) | At left front of engine compartment. |
| Fuel Injector Control Module (6.6L VIN 1) | Under engine air intake duct. |
| HVAC Control Module | Behind center of dash. |
| Ignition Control Module (ICM) (4.3L VIN W) | At right rear of engine, near ground strap. |
| Inflatable Restraint Sensing/Diagnostic Module (SDM) | Under driver's seat. |
| Memory Seat Module (MSM) | Underside of driver's seat. |
| Powertrain Control Module (PCM) (4.3L VIN W) | On left front of engine compartment. |
| Powertrain Control Module (PCM) (4.8L VIN V) | On left front of engine compartment. See Figure. |
| Powertrain Control Module (PCM) (5.3L VIN T) | On left front of engine compartment. See Figure. |
| Powertrain Control Module (PCM) (6.0L VIN U) | On left front of engine compartment. See Figure. |
| Powertrain Control Module (PCM) (8.1L VIN G) | On left front of engine compartment. See Figure. |
| Radio Antenna Module | Above right rear quarter glass, in headliner. |
| Rear Object Sensor Control Module (Avalanche) | Under left rear seat. |
| Rear Object Sensor Control Module (Escalade/Denali) | Under right rear seat. |
| Rear Wheel Steering Control Module | At left rear of vehicle, near spare tire bracket. |
| Remote Control Door Lock Receiver (RCDLR) | Behind top center of dash. |
| Sun Roof Module | At rear of sun roof. |
| Suspension Control Module (Avalanche) | Behind driver's seat, under left rear seat. |
| Suspension Control Module (Escalade/Denali) | At right rear wheelwell. |
| Throttle Actuator Control (TAC) Module | In left rear of engine compartment, near underhood fuse block. |
| Transfer Case Shift Control Module | Behind headlamp switch. |
| Transmission Control Module (TCM) | At left front of engine compartment. |
| Vehicle Communication Unit (VCU) | Behind left side of dash. |
| Vehicle Interface Unit (VIU) | Behind right side of dash. |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.