Sending Units & Sensors
WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
SENDING UNITS & SENSORS LOCATION
| Component | Location |
|---|---|
| A/C Refrigerant Pressure Sensor | On high pressure line, near A/C compressor. |
| Accelerator Pedal Position Sensor | Above accelerator pedal, on bracket. |
| Air Suspension Sensor (Left) | On frame rail, near left rear suspension arm. |
| Air Suspension Sensor (Right) | On frame rail, near right rear suspension arm. See Figure. |
| Ambient Air Temperature Sensor | On left center of radiator support. |
| Ambient Light Sensor | On top center of dash. |
| Ambient Light/Sun Load Sensor | On top center of dash, near base of windshield. |
| Camshaft Position (CMP) Sensor (4.2L) | On right front of cylinder head. See Figure. |
| Camshaft Position (CMP) Sensor (5.3L) | On top rear of engine block, near transmission. |
| Crankshaft Position (CKP) Sensor (4.2L) | On left rear of engine block, below starter. See Figure. |
| Crankshaft Position (CKP) Sensor (5.3L) | At right rear of engine, adjacent to starter. |
| Engine Coolant Temperature (ECT) Sensor | On left front of engine block, near generator. See Figure. |
| Fuel Pump & Sender Assembly | Inside fuel tank. |
| Fuel Tank Pressure Sensor | At top left rear of fuel tank. |
| Heated Oxygen Sensor Bank No. 1 Sensor No. 1 (5.3L) | In left bank exhaust pipe, ahead of catalytic converter. |
| Heated Oxygen Sensor Bank No. 1 Sensor No. 2 (5.3L) | In left bank of exhaust pipe, behind catalytic converter. |
| Heated Oxygen Sensor Bank No. 2 Sensor No. 1 (5.3L) | In right bank of exhaust pipe, ahead of catalytic converter. |
| Heated Oxygen Sensor Bank No. 2 Sensor No. 2 (5.3L) | In right bank of exhaust pipe, behind catalytic converter. |
| Heated Oxygen Sensor No. 1 (4.2L) | On exhaust manifold, on right side of engine. |
| Heated Oxygen Sensor No. 2 (4.2L) | Downstream of catalytic converter, on exhaust pipe. |
| Inflatable Restraint Front End Discriminating Sensor (Left) | At left rear of front frame crossmember. |
| Inflatable Restraint Front End Discriminating Sensor (Right) | At right rear of front frame crossmember. |
| Inside Air Temperature Sensor Assembly | At top of left "B" pillar, behind trim. |
| Intake Air Temperature (IAT) Sensor | In air intake duct, on top right of engine. See Figure. |
| Knock Sensor No. 1 (4.2L) | On lower left front of engine block. See Figure. |
| Knock Sensor No. 2 (4.2L) | On lower left rear of engine block. See Figure. |
| Knock Sensor (5.3L) | On top rear of engine. |
| Lower Left Air Temperature Sensor | Behind lower left center of dash, on air duct. |
| Lower Right Air Temperature Sensor | Behind lower right side of dash, on air duct. |
| Manifold Absolute Pressure (MAP) Sensor (4.2L) | On upper left side of engine. See Figure. |
| Manifold Absolute Pressure (MAP) Sensor (5.3L) | On top of engine. |
| Mass Airfow/Intake Air Temperature Sensor | In air intake duct. |
| Passlock Sensor | In ignition lock cylinder case. |
| Propshaft Speed Sensor (Left Front) | On left front of transfer case. |
| Propshaft Speed Sensor (Right Rear) | On right rear of transfer case. |
| Rain Sensor | On upper center of windshield. |
| Upper Left Air Temperature Sensor | Behind upper left center of dash. |
| Upper Right Air Temperature Sensor | Behind upper right center of dash. |
| Vehicle Speed Sensor | On left rear of transfer case. |
| Wheel Speed Sensor (Left Front) | On left front spindle/hub assembly. |
| Wheel Speed Sensor (Right Front) | On right front spindle/hub assembly. |