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 424 (ENGINE CONTROLS - SYSTEM & COMPONENT TESTING - 3.8L)COMPONENT LOCATIONSGRAND PRIXCOMPONENT LOCATIONS (GRAND PRIX)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Component Locations (Grand PRIX)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Component Locations (Grand PRIX)
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, and 2003 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
COMPONENT LOCATIONS (GRAND PRIX)
| Component | Location |
|---|---|
| A/C Refrigerant Pressure Sensor | Left Side Of Engine Compartment, Mounted On A/C Line Near Accumulator |
| Body Control Module | Below Left Side Of Instrument Panel, Left Of Steering Column |
| Camshaft Position Sensor | Right Side Of Engine, Below Intake Plenum |
| Crankshaft Position Sensor | Right Front Of Engine, Behind Harmonic Balancer |
| Cruise Control Module | Left Side Of Engine Compartment, Mounted On Strut Tower |
| Data Link Connector | Under Left Side Of Instrument Panel, Right Of Steering Column |
| EGR Valve | Upper Left Side Of Engine, Near Throttle Body |
| Electronic Brake Traction Control Module | Left Side Of Engine Compartment, On Strut Tower |
| Engine Coolant Temperature Sensor | Top Left Side Of Engine, Below Throttle Body |
| Engine Oil Level Switch | Front Center Of Engine Oil Pan |
| Engine Oil Pressure Switch | Lower Right Rear Of Engine, Near Oil Filter |
| EVAP Canister Purge Solenoid | At Top Rear Of Engine, On Intake Manifold, Near Fuel Injectors |
| EVAP Canister Vent Solenoid | Behind Left Rear Fascia Splash Shield, Behind Wheelwell |
| Fuel Injectors | In Intake Manifold |
| Fuel Level Sensor | Inside Fuel Tank, On Fuel Sender Assembly |
| Fuel Pump | Inside Fuel Tank, On Fuel Sender Assembly |
| Fuel Tank Pressure Sensor | Inside Fuel Tank, On Fuel Sender Assembly |
| Heated Oxygen Sensor 1 | Rear Of Engine, Mounted In Exhaust Manifold |
| Heated Oxygen Sensor 2 | In Exhaust System, Behind Catalytic Converter |
| Idle Air Control Valve | Top Of Engine, On Front Of Throttle Body |
| Ignition Control Module | Top Right Of Engine |
| Instrument Panel Fuse Block | Behind Right Side Of Instrument Panel |
| Intake Air Temperature Sensor | Left Front Of Engine Compartment, In Air Intake Duct |
| Knock Sensor (Bank 1) | On Front Of Engine, Above Starter |
| Knock Sensor (Bank 2) | On Rear Of Engine, Below Exhaust Manifold |
| Magnasteer Actuator | Lower Rear Of Engine Compartment, Behind Transaxle |
| Manifold Absolute Pressure Sensor (VIN K) | Top Right Side Of Intake Manifold |
| Manifold Absolute Pressure Sensor (VIN 1) | Top Rear Of Engine, Near Fuel Injectors |
| Mass Airflow Sensor | On Left Front Of Engine, Part Of Throttle Body |
| Powertrain Control Module | Left Side Of Engine Compartment, Inside Air Cleaner Assembly |
| Pressure Control Solenoid Valve | Inside Automatic Transaxle |
| Secondary Air Injection Pump Relay | Mounted On Outside Of Left Front Frame Rail Just Rear Of Bumper Support |
| Supercharger Boost Control Solenoid | Top Front Of Engine, Near Fuel Injectors |
| Supercharger Bypass Valve Actuator | Front Top Of Engine, Left Of TP Sensor |
| Throttle Position Sensor | Top Of Engine, On Throttle Body |
| Torque Converter Clutch Solenoid Valve | Inside Automatic Transaxle |
| Transaxle Range Switch | Left Rear Of Engine Compartment, On Transaxle |
| Underhood Junction Block | Right Side Of Engine Compartment, Mounted To Strut Tower |
| Vehicle Speed Sensor | Right Rear Of Engine Compartment, On Transaxle |
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.