Sending Units & Sensors
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. See Figure. |
| A/C Refrigerant Pressure Sensor Connector | On A/C refrigerant pressure sensor. See Figure. |
| Air Temperature Sensor Assembly (Inside) | In headliner, above driver. |
| Air Temperature Sensor Connector (Lower Right) | On lower right air temperature sensor. See Figure. |
| Air Temperature Sensor Connector (Upper Auxiliary) | On upper auxiliary air temperature sensor. See Figure. |
| Air Temperature Sensor Connector (Upper Left) | On upper left air temperature sensor. See Figure. |
| Air Temperature Sensor Connector (Upper Right) | On upper right air temperature sensor. See Figure. |
| Air Temperature Sensor (Lower Auxiliary) (Suburban & Yukon XL) | Behind right "C" pillar, at front of HVAC. See Figure. |
| Air Temperature Sensor (Lower Auxiliary) (Tahoe & Yukon) | Behind right "C" pillar, at front of HVAC. See Figure. |
| Air Temperature Sensor (Lower Left) | Behind dash, at left end of HVAC module. See Figure. |
| Air Temperature Sensor (Lower Right) | Behind dash, at bottom of HVAC module. See Figure. |
| Air Temperature Sensor (Outside) | Mounted to radiator core support. See Figure. |
| Air Temperature Sensor (Upper Auxiliary) (Except Tahoe & Yukon) | In rear auxiliary HVAC upper duct, near "C" pillar. See Figure. |
| Air Temperature Sensor (Upper Auxiliary) (Tahoe & Yukon) | In right "C" pillar. See Figure. |
| Air Temperature Sensor (Upper Left) | At center of dash, below dash trim panel. See Figure. |
| Air Temperature Sensor (Upper Right) | At center of dash, below dash trim panel. See Figure. |
| Ambient Air Temperature Sensor | In right front bumper filler assembly. See Figure. |
| 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 (CMP) Sensor Connector (Except 8.1L) | On top center rear of engine. See Figure. |
| Camshaft Position (CMP) Sensor (Except 8.1L) | On top center rear of engine. See Figure. |
| Camshaft Position Sensor (8.1L) | On left side of timing cover. See Figure. |
| Crankshaft Position (CKP) Sensor Connector (8.1L) | On crankshaft position (CKP) sensor. See Figure. |
| Crankshaft Position (CKP) Sensor (4.8L, 5.3L & 6.0L) | On lower right rear of engine block. See Figure. |
| Crankshaft Position (CKP) Sensor (5.3L VIN T) | On lower right rear of engine block. |
| Crankshaft Position (CKP) Sensor (6.0L VIN U) | On lower right rear of engine block. |
| Crankshaft Position (CKP) Sensor (8.1L VIN G) | On top left rear of engine block, near bellhousing. See Figure. |
| Engine Coolant Temperature (ECT) Sensor Connector (4.8L, 5.3L & 6.0L) | Left side of engine. See Figure. |
| Engine Coolant Temperature (ECT) Sensor Connector (8.1L) | Center of right cylinder head. See Figure. |
| Engine Coolant Temperature (ECT) Sensor Connector (8.1L) | Top right side of engine. See Figure. |
| Engine Coolant Temperature (ECT) Sensor (4.3L) | On side of left cylinder head. See Figure. |
| Engine Coolant Temperature (ECT) Sensor (4.8L, 5.3L & 6.0L) | 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, 5.3L & 6.0L) | On top rear of engine. See Figure. |
| Engine Oil Pressure (EOP) Sensor (8.1L) | 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 Sender | In fuel tank. See Figure. |
| Fuel Tank Pressure Sensor | On fuel tank, integral to fuel pump & sender assembly. |
| Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 (4.8L & 5.3L) | In left exhaust pipe, before catalytic converter. See Figure. |
| Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 (6.0L) | In left exhaust pipe, before catalytic converter. See Figure. |
| Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 (4.8L & 5.3L) | In left exhaust pipe, after catalytic converter. See Figure. |
| Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 (6.0L) | After left catalytic converter. See Figure. |
| Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 (4.8L & 5.3L) | In right exhaust pipe, before catalytic converter. See Figure. |
| Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 (6.0L) | Right exhaust pipe, before catalytic converter. See Figure. |
| Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 (4.8L & 5.3L) | In right exhaust pipe, after catalytic converter. See Figure. |
| Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 (6.0L) | In right exhaust pipe, after catalytic converter. See Figure. |
| HO2 Sensor Connector - Bank 1, Sensor 1 | Left front of transmission. See Figure. |
| 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 Front End Discriminating Sensor | In front of radiator. See Figure. |
| Inflatable Restraint Passenger Presence System (PPS) Sensor | Below right front seat. See Figure. |
| Inflatable Restraint Side Impact Sensor (SIS) (Left) | Mounted inside driver door, behind trim panel. See Figure. |
| Inflatable Restraint Side Impact Sensor (SIS) (Right) | Mounted inside passenger door, behind trim panel. See Figure. |
| 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 Sensor Bank No.1 (8.1L) | On left side of engine, forward of oil filter. |
| Knock Sensor (KS) 1 (4.8L, 5.3L & 6.0L) | In valley, under intake manifold. See Figure. |
| Knock Sensor (KS) 2 Connector (8.1L) | Left side of engine. See Figure. |
| Knock Sensor (KS) 2 (4.8L, 5.3L & 6.0L) | In valley, under intake manifold. See Figure. |
| Knock Sensor (KS) 2 (8.1L) | On left side of engine. See Figure. |
| Manifold Absolute Pressure (MAP) Sensor Connector (8.1L) | On top rear of engine, on intake manifold. See Figure. |
| Manifold Absolute Pressure (MAP) Sensor (4.8L, 5.3L & 6.0L) | On top rear of engine. See Figure. |
| Manifold Absolute Pressure (MAP) Sensor (8.1L) | Top of intake manifold. See Figure. |
| Mass Air Flow (MAF) Sensor | Right rear of engine compartment. See Figure. |
| 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. |
| Passlock Sensor | On ignition switch. See Figure. |
| Propshaft Speed Sensor (Front) | On left front side of transfer case. |
| Propshaft Speed Sensor (Rear) | On transfer case extension housing. |
| Rear Wheel Position Sensor | On bottom of rear steering actuator. See Figure. |
| Steering Wheel Speed/Position Sensor | Near base of steering column. See Figure. |
| Sunload Sensor Assembly | On center of dash, near defrost deflectors. See Figure. |
| Sunload Sensor Connector | On sunload sensor. See Figure. |
| Sunload Sensor Harness | Under top in instrument panel. See Figure. |
| Suspension Position Sensor Chassis Connector (Left Front) | Near left front wheel. See Figure. |
| Suspension Position Sensor Chassis Connector (Right Front) | Near right front wheel. See Figure. |
| Suspension Position Sensor Connector (Left Front) | On left front suspension position sensor. See Figure. |
| Suspension Position Sensor Connector (Left Rear) | On left rear suspension position sensor. See Figure. |
| Suspension Position Sensor Connector (Right Rear) | On right rear suspension position sensor. See Figure. |
| Suspension Position Sensor (Left Front) | On control arm, behind left front shock. See Figure. |
| Suspension Position Sensor (Left Rear) | Behind left rear shock, near frame rail. See Figure. |
| Suspension Position Sensor Pigtail Connector (Left Front) | Near left front wheel. See Figure. |
| Suspension Position Sensor (Right Front) | On control arm, behind right front shock. |
| Suspension Position Sensor (Right Rear) | Right rear frame rail. See Figure. |
| Throttle Position (TP) Sensor (4.8L, 5.3L & 6.0L) | On throttle body. See Figure. |
| Vehicle Speed Sensor (VSS) (A/T) | Right rear of transmission. See Figure. |
| Vehicle Speed Sensor (VSS) (M/T) | On rear of transmission. See Figure. |
| Vehicle Speed Sensor (VSS) (Transfer Case) | On rear of transfer case. See Figure. |
| Washer Fluid Level Sensor Connector | On washer fluid reservoir. See Figure. |
| Wheel Speed Sensor (WSS) Chassis Connector (Left Front) | Near left front wheel. See Figure. |
| Wheel Speed Sensor (WSS) Chassis Connector (Right Front) | Near right front wheel. See Figure. |
| Wheel Speed Sensor (WSS) Pigtail Connector (Left Front) | Near left front wheel. See Figure. |
| Wheel Speed Sensor (WSS) (2WD) (Right Front) | On right front hub assembly. See Figure. |
| Wheel Speed Sensor (WSS) (4WD) (Right Front) | On right front hub assembly. See Figure. |
| Yaw & Lateral Acceleration Sensor Connector (Escalade EXT) | Below right front seat. See Figure. |
| Yaw & Lateral Acceleration Sensor (Escalade) | Below center console. See Figure. |
| Yaw & Lateral Acceleration Sensor (Escalade EXT) | Under right front seat. See Figure. |