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 266 (BODY CONTROL MODULES)COMPONENT LOCATIONS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Component Locations
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Component Locations
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
COMPONENT LOCATIONS
| Component | Location |
|---|---|
| Data Link Connector (DLC) | Below Driver Side Of Instrument Panel, Near Steering Column |
| Driver Door Module | In Driver Door. See Fig 1 |
| Driver Information Center | In Center Of Instrument Panel, Above Radio. See Fig 2 |
| Electronic Brake Control Module (EBCM) | Driver Front Of Engine Compartment, Under Air Cleaner. See Fig 3 |
| Fuse Block (Rear) | Below Driver Side Rear Seat. See Fig 4 |
| Fuse Block (Underhood) | On Passenger Side Of Engine Compartment. See Fig 5 |
| Integration Module (Dash) | Behind Passenger Side Of Instrument Panel, Under Sound Insulator. See Fig 6 |
| Integration Module (Instrument Panel) | Behind Center Of Instrument Panel, Behind Climate Control Panel. See Fig 6 |
| Integration Module (Rear) | Behind Rear Seat Back. See Fig 6 and Fig 7 |
| Memory Seat Module (MSM) | Below Driver Front Seat. See Fig 8 |
| Powertrain Control Module (PCM - 3.5L) | Driver Front Corner Of Engine Compartment, Below Air Cleaner Housing. See Fig 9 |
| Powertrain Control Module (PCM - 4L) | Driver Front Corner Of Engine Compartment, Below Air Cleaner Housing. See Fig 10 |
| Remote Control Door Lock Receiver (RCDLR) | On Underside Of Rear Deck, Near Driver Side Speaker. See Fig 11 |
| Sensing & Diagnostic Module (SDM) | Below Passenger Front Seat. See Fig 12 |
| Theft Deterrent Control (TDC) Module | Driver Side Of Instrument Panel, To Right Of Steering Column. See Fig 2 |
| Vehicle Communication Unit (VCU - 2.6) | Rear Of Passenger Compartment, Behind Rear Seat Back, Mounted To Vehicle Interface Unit. See Fig 13 |
| Vehicle Communication Interface Module (VCIM - F1) | Rear Of Passenger Compartment, Behind Rear Seat Back. See Fig 14 |
| Vehicle Interface Unit (VIU - 2.6) | Rear Of Passenger Compartment, Behind Rear Seat Back, Mounted To Electronics Bay. See Fig 13 |
| C200 | Body Harness To IP Harness, Under Driver Front Corner Of Instrument Panel. See Fig 15 |
| C201 | Body Harness To IP Harness, Under Driver Front Corner Of Instrument Panel. See Fig 6 and Fig 16 |
| C329 | Body Harness To Headliner Harness, Rear Of Passenger Compartment, Behind Passenger Rear Quarter Upper Trim Panel. See Fig 7 |
| Ground (SDM) | Under Driver Side Seat. See Fig 17 |
| G200 | On Driver Side Windshield Pillar. See Fig 15 |
| G201 | On Passenger Side Windshield Pillar. See Fig 16 |
| G302 | Under Driver Side Rear Seat. See Fig 4 |
| S217 | In Body Harness, 9" From Pass-Through Grommet. See Fig 15 |
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.