Sending Units & Sensors
SENDING UNITS & SENSORS LOCATION
| Component | Location |
|---|---|
| Accelerator Pedal Position (APP) Sensor | Top of accelerator pedal assembly. See Figure. |
| A/C Low Pressure Sensor | Right rear of engine compartment. See Figure. |
| Air Temperature Sensor - Lower Auxiliary (Long Wheel Base) | Front of rear HVAC module. See Figure. |
| Air Temperature Sensor - Lower Auxiliary (Short Wheel Base) | Front of rear HVAC module. See Figure. |
| Air Temperature Sensor - Lower Left | Left side of HVAC module. See Figure. |
| Air Temperature Sensor - Lower Right | Bottom left side of HVAC module. 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 - HVAC | Right front of engine compartment. See Figure. |
| Ambient Air Temperature Sensor - ISRVM | Left front of engine compartment. See Figure. |
| Ambient Light Sensor | Top center of dash. See Figure. |
| Ambient Light/Sunload Sensor Assembly (Except Tahoe & Escalade) | Top center of dash. See Figure. |
| Ambient Light/Sunload Sensor Assembly (Tahoe & Escalade) | Top center of dash. See Figure. |
| A/Trans Input & Output Speed Sensor Assembly | In automatic transmission. See Figure. |
| Automatic Transmission (AT) Input (Shaft) Speed Sensor (ISS) Assembly (4L80-E / 4L85-E) | In automatic transmission. See Figure. |
| Automatic Transmission (AT) Output (Shaft) Speed Sensor (OSS) Assembly (4L80-E / 4L85-E) | In automatic transmission. See Figure. |
| Automatic Transmission Fluid Temperature (TFT) Sensor (4L80-E / 4L85-E) | In automatic transmission. See Figure. |
| Brake Booster Vacuum Sensor | On brake booster unit. See Figure. |
| Camshaft Position (CMP) Sensor | Lower front of engine. See Figure. |
| Engine Coolant Temperature (ECT) Sensor | Front of left cylinder head. See Figure. |
| Engine Oil Pressure (EOP) Sensor | On top rear of engine. See Figure. |
| Fuel Tank Pressure (FTP) Sensor (Long Wheel Base) | On fuel tank, integral to secondary fuel pump & sender assembly. See Figure. |
| Fuel Tank Pressure (FTP) Sensor (Short Wheel Base) | On fuel tank, integral to fuel pump & sender assembly. See Figure. |
| Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 | Under the vehicle to the left side of the engine before the catalytic converter See Figure. |
| Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 | Under the vehicle to the left side of the engine after the catalytic converter See Figure. |
| Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 | Under the vehicle to the right side of the engine before the catalytic converter See Figure. |
| Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 | Under the vehicle to the right side of the engine after the catalytic converter See Figure. |
| Inflatable Restraint Electronic Front End Sensor - Left | Left side of radiator core support. See Figure. |
| Inflatable Restraint Electronic Front End Sensor - Right | Right side of radiator core support. See Figure. |
| Inflatable Restraint Front Passenger Presence System (PPS) Sensor | Below right front seat. See Figure. |
| Inflatable Restraint Seat Position Sensor - Left | Under right front of driver's seat. See Figure. |
| Inflatable Restraint Side Impact Sensor (SIS) - Left Front | Inside left front door. See Figure. |
| Inflatable Restraint Side Impact Sensor (SIS) - Left Rear | Inside left rear door. See Figure. |
| Inflatable Restraint Side Impact Sensor (SIS) - Right Front | Inside right front door. See Figure. |
| Inflatable Restraint Side Impact Sensor (SIS) - Right Rear | Inside right rear door. See Figure. |
| Inflatable Restraint Vehicle Rollover Sensor (ASF) | Under center console. See Figure. |
| Input Speed Sensor (ISS) Assembly | In automatic transmission. See Figure. |
| Inside Air Temperature Sensor - Front | Above left front of headliner. See Figure. |
| Inside Air Temperature Sensor - Rear | Above left rear of headliner. See Figure. |
| Knock Sensor (KS) 1 | On left side of engine. See Figure. |
| Knock Sensor (KS) - 2 | On right side of engine. See Figure. |
| Liftgate Object Sensor - Left | On left edge of liftgate. See Figure. |
| Liftgate Object Sensor - Right | On right edge of liftgate. See Figure. |
| Lumbar Sensor - Incline | In front passenger's seat back. See Figure. |
| Manifold Absolute Pressure (MAP) Sensor | On top rear of engine. See Figure. |
| Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor | Right front of engine compartment. See Figure. |
| Object Sensor - Left Rear Corner (Avalanche, Suburban & Tahoe W/One Piece Liftgate) | On left side of rear bumper. See Figure. |
| Object Sensor - Left Rear Corner (Avalanche, Suburban & Tahoe W/Tailgate) | On left side of rear bumper. See Figure. |
| Object Sensor - Left Rear Corner (Tahoe & Escalade W/One Piece Liftgate) | On left side of rear bumper. See Figure. |
| Object Sensor - Left Rear Corner (Tahoe & Escalade W/Tailgate) | On left side of rear bumper. See Figure. |
| Object Sensor - Left Rear Corner (Yukon W/One Piece Liftgate) | On left side of rear bumper. See Figure. |
| Object Sensor - Left Rear Middle (Avalanche, Suburban & Tahoe W/One Piece Liftgate) | On left middle of rear bumper. See Figure. |
| Object Sensor - Left Rear Middle (Avalanche, Suburban & Tahoe W/Tailgate) | On left middle of rear bumper. See Figure. |
| Object Sensor - Left Rear Middle (Tahoe & Escalade W/One Piece Liftgate) | On left middle of rear bumper. See Figure. |
| Object Sensor - Left Rear Middle (Tahoe & Escalade W/Tailgate) | On left middle of rear bumper. See Figure. |
| Object Sensor - Left Rear Middle (Yukon W/One Piece Liftgate) | On left middle of rear bumper. See Figure. |
| Object Sensor - Right Rear Corner (Avalanche, Suburban & Tahoe W/One Piece Liftgate) | On right side of rear bumper. See Figure. |
| Object Sensor - Right Rear Corner (Avalanche, Suburban & Tahoe W/Tailgate) | On right side of rear bumper. See Figure. |
| Object Sensor - Right Rear Corner (Tahoe & Escalade W/One Piece Liftgate) | On right side of rear bumper. See Figure. |
| Object Sensor - Right Rear Corner (Tahoe & Escalade W/Tailgate) | On right side of rear bumper. See Figure. |
| Object Sensor - Right Rear Corner (Yukon W/One Piece Liftgate) | On right side of rear bumper. See Figure. |
| Object Sensor - Right Rear Middle (Avalanche, Suburban & Tahoe W/One Piece Liftgate) | On right middle of rear bumper. See Figure. |
| Object Sensor - Right Rear Middle (Avalanche, Suburban & Tahoe W/Tailgate) | On right middle of rear bumper. See Figure. |
| Object Sensor - Right Rear Middle (Tahoe & Escalade W/One Piece Liftgate) | On right middle of rear bumper. See Figure. |
| Object Sensor - Right Rear Middle (Tahoe & Escalade W/Tailgate) | On right middle of rear bumper. See Figure. |
| Object Sensor - Right Rear Middle (Yukon W/One Piece Liftgate) | On right middle of rear bumper. See Figure. |
| Outside Moisture Sensor | Mounted to windshield, near inside rearview mirror. See Figure. |
| Propshaft Speed Sensor - Front | On left side of transfer case. See Figure. |
| Propshaft Speed Sensor - Rear | On transfer case extension housing. See Figure. |
| Steering Angle Sensor | Base of steering column. See Figure. |
| Suspension Position Sensor - Left Front | On control arm, behind left front shock. See Figure. |
| Suspension Position Sensor - Left Rear | Forward of rear axle, on left frame rail. See Figure. |
| Suspension Position Sensor - Right Front | On control arm, behind right front shock. See Figure. |
| Suspension Position Sensor - Right Rear | Forward of rear axle, on right frame rail. See Figure. |
| Vehicle Speed Sensor (VSS) (A/T) | Right rear of transmission. See Figure. |
| Vehicle Speed Sensor (VSS) (Transfer Case) | On rear of transfer case. See Figure. |
| VSS Sensor | On transfer case. See Figure. |
| Wheel Speed Sensor (WSS) - Left Front | On left front hub assembly. See Figure. |
| Wheel Speed Sensor (WSS) - Left Rear | On left rear hub assembly. See Figure. |
| Wheel Speed Sensor (WSS) - Right Front | On right front hub assembly. See Figure. |
| Wheel Speed Sensor (WSS) - Right Rear | On right rear hub assembly. See Figure. |
| YAW Rate & Lateral Acceleration Sensor | Below right front seat. See Figure. |