Sending Units & Sensors
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
SENDING UNITS & SENSORS LOCATION
| Component | Location |
|---|---|
| Accelerator Pedal Position Sensor | Behind accelerator pedal. |
| A/C Refrigerant Pressure Sensor | In high side pressure line, near compressor. |
| Air Temperature Sensor Assembly (Inside) | In headliner, above driver. |
| Air Temperature Sensor (Lower Auxiliary) | Behind right "C" pillar, at front of HVAC. |
| Air Temperature Sensor (Lower Left) | Behind dash, at left end of HVAC module. |
| Air Temperature Sensor (Lower Right) | Behind dash, at bottom of HVAC module. |
| Air Temperature Sensor (Outside) | Mounted to radiator core support. |
| Air Temperature Sensor (Upper Auxiliary) | In rear auxiliary HVAC upper duct, near "C" pillar. |
| Air Temperature Sensor (Upper Left) | At center of dash, below dash trim panel. |
| Air Temperature Sensor (Upper Right) | At center of dash, below dash trim panel. |
| 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. |
| Camshaft Position Sensor (Except 8.1L) | On top center rear of engine. See Figure. |
| Camshaft Position Sensor (8.1L VIN G) | On left side of timing cover. See Figure. |
| Crankshaft Position (CKP) Sensor (4.8L VIN V) | 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 (8.1L VIN G) | On top left rear of engine block, near bellhousing. See Figure. |
| Engine Coolant Temperature (ECT) Sensor (4.8L VIN V) | 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 (8.1L VIN G) | At middle of right cylinder head. |
| Engine Oil Pressure (EOP) Sensor (4.8L VIN V) | 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 VIN G) | On top rear of engine. See Figure. |
| Fuel Composition Sensor (Except 8.1L) | Inside left frame rail, forward of electronic brake control module. |
| 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) (W/Dual Tanks) | In secondary fuel tank. |
| 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 Electronic Front End Sensor (Left) | On left front of vehicle, by core support. |
| Inflatable Restraint Electronic Front End Sensor (Right) | On right front of vehicle, by core support. |
| Inflatable Restraint Side Impact Sensor (Left) | Mounted inside driver door, behind trim panel. |
| Inflatable Restraint Side Impact Sensor (Right) | Mounted inside passenger door, behind trim panel. |
| Inside Auxiliary Air Temperature Sensor Assembly | In headliner, near left "C" pillar. |
| Intake Air Temperature (IAT)/Mass Airflow (MAF) Sensor | In air induction tube. See Figure. |
| Knock Sensors (KS) (4.8L VIN V) | 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 VIN G) | On left side of engine, forward of oil filter. |
| Knock Sensor Bank No. 2 (8.1L VIN G) | On right side of engine, forward of starter. |
| Manifold Absolute Pressure (MAP) Sensor (4.8L VIN V) | 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 VIN G) | On top rear of engine, on intake manifold. |
| Object Sensor (Left Rear Corner) | On left side of rear bumper. |
| Object Sensor (Left Rear Middle) | On left middle of rear bumper. |
| Object Sensor (Right Rear Corner) | On right side of rear bumper. |
| Object Sensor (Right Rear Middle) | On right middle of rear bumper. |
| Propshaft Speed Sensor (Front) | On left front side of transfer case. |
| Propshaft Speed Sensor (Rear) | On transfer case extension housing. |
| Steering Wheel Speed/Position Sensor | Near base of steering column. |
| Sunload Sensor | On center of dash, near defrost deflectors. |
| Suspension Position Sensor (Left Front) | On control arm, behind left front shock. |
| Suspension Position Sensor (Left Rear) | Behind left rear shock, near frame rail. |
| Suspension Position Sensor (Right Front) | On control arm, behind right front shock. |
| Suspension Position Sensor (Right Rear) | Behind right rear shock, near frame rail. |
| Vehicle Speed Sensor | On rear of transmission. |
| Washer Fluid Level Sensor | In washer fluid reservoir. |
| Wheel Speed Sensors (4) | On respective wheel hub assembly. |
| Yaw & Lateral Acceleration Sensor | Under right front seat. |