Sending Units & Sensors
SENDING UNITS & SENSORS LOCATION
| Component | Location |
|---|---|
| Accelerator Pedal Position (APP) Sensor | Accelerator pedal assembly. See Figure. |
| A/C Low Pressure Sensor (Except Hybrid) | Right rear of engine compartment. See Figure. |
| A/C Low Pressure Sensor (Hybrid) | Right front of engine compartment. See Figure. |
| A/C Refrigerant Pressure Sensor (Except Hybrid) | A/C high pressure hose. See Figure. |
| A/C Refrigerant Pressure Sensor (Hybrid) | Right front engine compartment. See Figure. |
| Air Temperature Sensor - Lower Auxiliary (Long Wheel Base) (7) | Rear HVAC module. See Figure. |
| Air Temperature Sensor - Lower Auxiliary (Short Wheel Base) (7) | 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 | Center of dash. See Figure. |
| Air Temperature Sensor - Upper Right | Center of dash. 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 | Center of dash. See Figure. |
| Ambient Light/Sunload Sensor Assembly (Except Tahoe & Escalade) | Center of dash. See Figure. |
| Ambient Light/Sunload Sensor Assembly (Tahoe & Escalade) | 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. |
| Barometric Pressure (BARO) Sensor | Left side of engine compartment. |
| Battery Current Sensor | Left side of engine compartment. See Figure. |
| Brake Booster Vacuum Sensor | Brake booster unit. See Figure. |
| Brake Fluid Pressure Sensor | Attached to electronic brake control module motor. |
| Brake Master Cylinder Piston Position Sensor | On brake master cylinder. See Figure. |
| Camshaft Position (CMP) Sensor | Lower front of engine. See Figure. |
| Crankshaft Position (CKP) Sensor | Right rear of engine. See Figure. |
| Drive Motor Battery Temperature Sensor - Air Inlet | Left inside of drive motor generator battery case. |
| Drive Motor Battery Temperature Sensor - Air Outlet | Right inside of drive motor generator battery case. |
| Drive Motor Battery Temperature Sensor 1 | Inside drive motor generator battery case, on top of battery module 1. |
| Drive Motor Battery Temperature Sensor 2 | Inside drive motor generator battery case, on top of battery module 14. |
| Drive Motor Battery Temperature Sensor 3 | Inside drive motor generator battery case, on top of battery module 27. |
| Drive Motor Battery Temperature Sensor 4 | Inside drive motor generator battery case, on top of battery module 40. |
| Engine Coolant Temperature (ECT) Sensor | Front of left cylinder head. See Figure. |
| Engine Oil Pressure (EOP) Sensor (11) | Top rear of engine. See Figure. |
| Fuel Tank Pressure (FTP) Sensor (Long Wheel Base) | Secondary fuel pump & sender assembly. See Figure. |
| Fuel Tank Pressure (FTP) Sensor (Short Wheel Base) | Fuel pump & sender assembly. See Figure. |
| Generator Control Module Temperature Sensor | Right front of engine compartment. 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. |
| High Voltage Circuit Impact Detection Sensor | Lower center front of engine compartment. See Figure. |
| Inflatable Restraint Electronic Front End Sensor - Left | Left side of radiator. See Figure. |
| Inflatable Restraint Electronic Front End Sensor - Right | Right side of radiator. See Figure. |
| Inflatable Restraint Front End Sensor - Left | Lower left front of engine compartment. See Figure. |
| Inflatable Restraint Front End Sensor - Right | Lower right front of engine compartment. See Figure. |
| Inflatable Restraint Front Passenger Presence System (PPS) Sensor | Under front passenger's seat. See Figure. |
| Inflatable Restraint Seat Position Sensor - Left | Under driver's seat. See Figure. |
| Inflatable Restraint Side Impact Sensor (SIS) - Left Front | Driver's door. See Figure. |
| Inflatable Restraint Side Impact Sensor (SIS) - Left Rear | Left rear door. See Figure. |
| Inflatable Restraint Side Impact Sensor (SIS) - Right Front | Front passenger's door. See Figure. |
| Inflatable Restraint Side Impact Sensor (SIS) - Right Rear | 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 | Left front of headliner. See Figure. |
| Inside Air Temperature Sensor - Rear | Left rear of headliner. See Figure. |
| Knock Sensor (KS) - 1 | Left side of engine. See Figure. |
| Knock Sensor (KS) - 2 | Right side of engine. See Figure. |
| Liftgate Object Sensor - Left | Left edge of liftgate. See Figure. |
| Liftgate Object Sensor - Right | Right edge of liftgate. See Figure. |
| Lumbar Sensor - Incline (3) | Front passenger's seat back. See Figure. |
| Manifold Absolute Pressure (MAP) Sensor | 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) | Left side of rear bumper. See Figure. |
| Object Sensor - Left Rear Corner (Avalanche, Suburban & Tahoe W/Tailgate) | Left side of rear bumper. See Figure. |
| Object Sensor - Left Rear Corner (Tahoe & Escalade W/One Piece Liftgate) | Left side of rear bumper. See Figure. |
| Object Sensor - Left Rear Corner (Tahoe & Escalade W/Tailgate) | Left side of rear bumper. See Figure. |
| Object Sensor - Left Rear Corner (Yukon W/One Piece Liftgate) | Left side of rear bumper. See Figure. |
| Object Sensor - Left Rear Middle (Avalanche, Suburban & Tahoe W/One Piece Liftgate) | Left middle of rear bumper. See Figure. |
| Object Sensor - Left Rear Middle (Avalanche, Suburban & Tahoe W/Tailgate) | Left middle of rear bumper. See Figure. |
| Object Sensor - Left Rear Middle (Tahoe & Escalade W/One Piece Liftgate) | Left middle of rear bumper. See Figure. |
| Object Sensor - Left Rear Middle (Tahoe & Escalade W/Tailgate) | Left middle of rear bumper. See Figure. |
| Object Sensor - Left Rear Middle (Yukon W/One Piece Liftgate) | Left middle of rear bumper. See Figure. |
| Object Sensor - Right Rear Corner (Avalanche, Suburban & Tahoe W/One Piece Liftgate) | Right side of rear bumper. See Figure. |
| Object Sensor - Right Rear Corner (Avalanche, Suburban & Tahoe W/Tailgate) | Right side of rear bumper. See Figure. |
| Object Sensor - Right Rear Corner (Tahoe & Escalade W/One Piece Liftgate) | Right side of rear bumper. See Figure. |
| Object Sensor - Right Rear Corner (Tahoe & Escalade W/Tailgate) | Right side of rear bumper. See Figure. |
| Object Sensor - Right Rear Corner (Yukon W/One Piece Liftgate) | Right side of rear bumper. See Figure. |
| Object Sensor - Right Rear Middle (Avalanche, Suburban & Tahoe W/One Piece Liftgate) | Right middle of rear bumper. See Figure. |
| Object Sensor - Right Rear Middle (Avalanche, Suburban & Tahoe W/Tailgate) | Right middle of rear bumper. See Figure. |
| Object Sensor - Right Rear Middle (Tahoe & Escalade W/One Piece Liftgate) | Right middle of rear bumper. See Figure. |
| Object Sensor - Right Rear Middle (Tahoe & Escalade W/Tailgate) | Right middle of rear bumper. See Figure. |
| Object Sensor - Right Rear Middle (Yukon W/One Piece Liftgate) | Right middle of rear bumper. See Figure. |
| Outside Moisture Sensor | Near inside rearview mirror. See Figure. |
| Propshaft Speed Sensor - Front | Left side of transfer case. See Figure. |
| Propshaft Speed Sensor - Rear | Transfer case extension housing. See Figure. |
| Seat Front/Rear Vertical Motor Position Sensor - Driver | Under driver's seat. |
| Seat Horizontal Motor Position Sensor - Driver | Under driver's seat. |
| Steering Angle Sensor (6) | Base of steering column. See Figure. |
| Suspension Position Sensor - Left Front | Left side of engine compartment. See Figure. |
| Suspension Position Sensor - Left Rear | Forward of rear axle, on left frame rail. See Figure. |
| Suspension Position Sensor - Right Front | Right side of engine compartment. See Figure. |
| Suspension Position Sensor - Right Rear | Forward of rear axle, on right frame rail. See Figure. |
| Transfer Case 2/4 Wheel Drive Actuator Position Sensor | On transfer case encoder motor. See Figure. |
| Vehicle Speed Sensor (VSS) (A/T) | Right rear of transmission. See Figure. |
| Vehicle Speed Sensor (VSS) (Transfer Case) | Rear of transfer case. See Figure. |
| VSS Sensor | Transfer case. See Figure. |
| Wheel Speed Sensor (WSS) - Left Front | Left front wheel hub assembly. See Figure. |
| Wheel Speed Sensor (WSS) - Left Rear | Left rear wheel hub assembly. See Figure. |
| Wheel Speed Sensor (WSS) - Right Front | Right front wheel hub assembly. See Figure. |
| Wheel Speed Sensor (WSS) - Right Rear | Right rear wheel hub assembly. See Figure. |
| YAW Rate & Lateral Acceleration Sensor | Under front passenger's seat. See Figure. |