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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 283 (ELECTRICAL COMPONENT LOCATOR)CONTROL UNITS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Control Units
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Control Units
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Blower Motor Control Processor | Part of HVAC module, behind glove box, in front of blower motor. |
| Body Control Module | In console, above fuse block, in center console. |
| Cruise Control Module (CCM) | At left side of engine compartment, near strut tower. See Figure . |
| Electronic Brake Control Module (EBCM) | Left side of engine compartment. See Figure . |
| HVAC Control Module | Center of dash, below radio. |
| Ignition Control Module | On top of right valve cover. |
| Inflatable Restraint I/P Module | Right side of dash, above glove box. |
| Inflatable Restraint Sensing & Diagnostic Module | Under right front seat. |
| Inflatable Restraint Side Impact Module (Left) | Left side of driver seat back cover. |
| Inflatable Restraint Side Impact Module (Right) | Right side of passenger seat back cover. |
| Memory Seat & Mirror Module | Under driver seat. |
| OnStar(R) Transceiver | Under dash, left of blower motor. |
| Powertrain Control Module (PCM) | At left side of engine compartment, in air cleaner assembly. See Figure . |
| Rear Parking Assist Sensors | Behind left rear wheelhouse. |
| Remote Control Door Lock Receiver | Behind center of dash, near windshield defrost vent, in sun roof assembly. |
| Sun Roof Module | In sun roof assembly. |
| Theft Deterrent Control Module | In steering column, at ignition switch. |
| Turn Signal/Multifunction Flasher Module | In center console fuse block. |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.