Sending Units & Sensors
WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. 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 | In air conditioning muffler hose assembly. |
| Accelerator Pedal Position Sensor (Except 4.3L) | Driver's floor board, behind accelerator pedal. |
| Air Temperature Sensor Assembly (Inside) | In headliner, above driver. |
| Air Temperature Sensor (Lower Left) | In lower left floor duct assembly. |
| Air Temperature Sensor (Lower Right) | At bottom center of HVAC box, in floor duct. |
| Air Temperature Sensor (Outside) | At center of core support, behind grille. |
| Air Temperature Sensor (Upper) | Below dash trim panel, in upper duct. |
| Ambient Air Temperature Sensor | In right front bumper filler assembly. |
| Ambient Light Sensor | On top center of dash. |
| Automatic Transmission Fluid Temperature Sensor | In automatic transmission. |
| Automatic Transmission Input Shaft Speed Sensor | In automatic transmission. |
| Automatic Transmission Turbine Speed Sensor | In upper left of transmission. |
| Barometric Pressure Sensor (6.6L) | On left side of engine. |
| Boost Sensor (6.6L) | On right side of engine, on intake manifold. |
| Camshaft Position Sensor (4.3L) | In distributor. |
| Camshaft Position Sensor (4.8L) | On top center rear of engine. |
| Camshaft Position Sensor (5.3L VIN T) | On top center rear of engine. |
| Camshaft Position Sensor (6.0L VIN U) | On top center rear of engine. |
| Camshaft Position Sensor (6.6L) | On front of engine, near cooling fan pulley. |
| Camshaft Position Sensor (8.1L) | On left side of timing cover. |
| Crankshaft Position (CKP) Sensor (4.3L | On bottom front of engine, near crank pulley. See Figure. |
| Crankshaft Position (CKP) Sensor (4.8L) | On lower right rear of engine block. See Figure. |
| Crankshaft Position (CKP) Sensor (5.3L VIN T) | On lower right rear of engine block. See Figure. |
| Crankshaft Position (CKP) Sensor (6.0L VIN U) | On lower right rear of engine block. See Figure. |
| Crankshaft Position (CKP) Sensor (6.6L) | On right side of engine front cover. |
| Crankshaft Position (CKP) Sensor (8.1L) | On top left rear of engine block, near bellhousing. See Figure. |
| Engine Coolant Temperature (ECT) Sensor (4.3L) | On rear side of left cylinder head. See Figure. |
| Engine Coolant Temperature (ECT) Sensor (4.8L) | On front side of left cylinder head. See Figure. |
| Engine Coolant Temperature (ECT) Sensor (5.3L VIN T) | On front side of left cylinder head. See Figure. |
| Engine Coolant Temperature (ECT) Sensor (6.0L VIN U) | On front side of left cylinder head. See Figure. |
| Engine Coolant Temperature (ECT) Sensor (6.6L) | On top front of engine. See Figure. |
| Engine Coolant Temperature Sensor (8.1L) | At middle of right cylinder head. |
| Engine Oil Pressure (EOP) Sensor (4.8L) | On top rear of engine. |
| Engine Oil Pressure (EOP) Sensor (5.3L VIN T) | On top rear of engine. |
| Engine Oil Pressure (EOP) Sensor (6.0L VIN U) | On top rear of engine. |
| Engine Oil Pressure (EOP) Sensor (8.1L) | On top rear of engine. See Figure. |
| Fuel Composition Sensor | At left side of engine compartment, attached to fuel lines. |
| Fuel Level Sensor (Primary) | In primary fuel tank. |
| Fuel Level Sensor (Secondary) | In secondary fuel tank. |
| Fuel Pump & Sender Assembly (Primary) | In primary fuel tank. |
| Fuel Pump & Sender Assembly (Secondary) | In secondary fuel tank. |
| Fuel Rail Pressure Sensor (6.6L) | Under intake manifold shield, on fuel rail. |
| Fuel Tank Pressure Sensor | On fuel tank, integral to fuel pump & sender assembly. |
| Heated Oxygen Sensor Bank No. 1 Sensor No. 1 | In left exhaust pipe, before catalytic converter. |
| Heated Oxygen Sensor Bank No. 1 Sensor No. 2 | In left exhaust pipe, after catalytic converter. |
| Heated Oxygen Sensor Bank No. 2 Sensor No. 1 | In right exhaust pipe, before catalytic converter. |
| Heated Oxygen Sensor Bank No. 2 Sensor No. 2 | In right exhaust pipe, after catalytic converter. |
| Inflatable Restraint Front End Discriminating Sensor (Left) | On left front of vehicle, by core support. |
| Inflatable Restraint Front End Discriminating Sensor (Right) | On right front of vehicle, by core support. |
| Intake Air Temperature (IAT)/Mass Airflow (MAF) Sensor | In air induction tube. See Figure. |
| Knock Sensor (KS) (4.3L) | On rear of engine block. See Figure. |
| Knock Sensors (KS) (4.8L) | In valley, under intake manifold. See Figure. |
| Knock Sensors (KS) (5.3L VIN T) | In valley, under intake manifold. See Figure. |
| Knock Sensors (KS) (6.0L VIN U) | In valley, under intake manifold. See Figure. |
| Knock Sensor Bank No. 1 (8.1L) | On left side of engine, forward of oil filter. |
| Knock Sensor Bank No. 2 (8.1L) | On right side of engine, forward of starter. |
| Manifold Absolute Pressure (MAP) Sensor (4.3L) | On top rear of engine, on intake manifold. See Figure. |
| Manifold Absolute Pressure (MAP) Sensor (4.8L) | On top rear of engine, on intake manifold. See Figure. |
| Manifold Absolute Pressure (MAP) Sensor (5.3L VIN T) | On top rear of engine, on intake manifold. See Figure. |
| Manifold Absolute Pressure (MAP) Sensor (6.0L VIN U) | On top rear of engine, on intake manifold. See Figure. |
| Manifold Absolute Pressure (MAP) Sensor (8.1L) | On top rear of engine, on intake manifold. |
| Propshaft Speed Sensor (Front) | On left front side of transfer case. |
| Propshaft Speed Sensor (Rear) | On transfer case extension housing. |
| Throttle Position (TP) Sensor (4.3L) | On throttle body assembly. See Figure. |
| Vehicle Speed Sensor (2WD) | On left rear side of transmission. |
| Vehicle Speed Sensor (4WD) | On left side of transfer case. |
| Washer Fluid Level Sensor | In washer fluid reservoir. |
| Water In Fuel Sensor (6.6L) | On fuel filter element. |
| Wheel Speed Sensor (Left Front) | On left front wheel hub assembly. |
| Wheel Speed Sensor (Right Front) | On right front wheel hub assembly. |