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.
2003 Cadillac Escalade EXTFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Blower Motor Control Processor | Behind right side of dash. |
| Blower Motor Control Processor (Auxiliary) | Behind right rear quarter panel, below auxiliary blower motor. |
| Body Control Module | On lower left side of dash, below steering column. |
| Driver Door Module | Behind left front door trim panel, near handle. |
| Electronic Brake Control Module | On left side of inner frame. |
| Electronic Suspension Control Module | Behind right "C" pillar trim panel. |
| FM Impedance Matching Module | In right rear quarter glass. |
| Front Passenger Door Module | Behind right front door trim, near handle. |
| Heated Seat Module (Left Rear) | Under left rear seat. |
| Heated Seat Module (Right Rear) | Under right rear seat. |
| HVAC Control Module | Behind center of dash. |
| HVAC Control Module (Auxiliary) | Mounted to top of auxiliary HVAC assembly. |
| Inflatable Restraint Sensing & Diagnostic Module | Under left front seat. |
| Memory Seat Module | Underside of left front seat. |
| Powertrain Control Module (PCM) | At left front side of engine compartment. See Figure. |
| Radio Antenna Module | Above right rear quarter glass, in headliner. |
| Rear Object Sensor Control Module | Under 2nd row seat. |
| Rear Wheel Steering Control Module | Below vehicle, between spare tire & rear bumper. |
| Rear Window Wiper Module | In liftgate, below rear glass. |
| Sun Roof Module | Above front of headliner. |
| Throttle Actuator Control Module | At left rear side of engine compartment, near underhood fuse block. See Figure. |
| Transfer Case Shift Control Module | Left side of I/P area, behind knee bolster, above parking brake assembly. |
| Vehicle Communication Interface Module | Behind right side of dash. |
| Windshield Wiper Motor Module | Under cowl, near wiper arms. |
Factory Service Tools
Use the Manual With the Right Hardware
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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.