Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 187 (ELECTRICAL COMPONENT LOCATOR)SENDING UNITS & SENSORS
1999 GMC Forward Control 5.7 R, Automatic
Sending Units & Sensors
1999 GMC Forward Control 5.7 R, AutomaticSECTION Sending Units & Sensors
WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. 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 | On left side of engine compartment, on accumulator. |
| Ambient Air Temperature Sensor (Outside) | Near center front of radiator. |
| Automatic Transmission Fluid Temperature Sensor | Inside transaxle. |
| Automatic Transmission Input Shaft Speed Sensor | Inside transaxle. |
| Camshaft Position (CMP) Sensor (3.1L VIN J) | Front of engine, below intake plenum. |
| Camshaft Position (CMP) Sensor (3.8L VIN K) | Front of engine, above crankshaft pulley. See Figure . |
| Camshaft Position (CMP) Sensor (3.8L VIN 1) | Front of engine, above crankshaft pulley. See Figure . |
| Crankshaft Position (CKP) Sensor (3.8L VIN K) | Front of engine, behind harmonic balancer. See Figure . |
| Crankshaft Position (CKP) Sensor (3.8L VIN 1) | Front of engine, behind harmonic balancer. See Figure . |
| Crankshaft Position (CKP) Sensor A (3.1L VIN J) | Left side of engine, behind harmonic balancer. See Figure . |
| Crankshaft Position (CKP) Sensor B (3.1L VIN J) | Lower right side of engine, below exhaust manifold. See Figure . |
| Daytime Running Lamps Ambient Light Sensor | At top center of dash. |
| Engine Coolant Temperature (ECT) Sensor (3.1L VIN J) | Top left rear of engine, below throttle body. |
| Engine Coolant Temperature (ECT) Sensor (3.8L VIN K) | Top left rear of engine, below throttle body. See Figure . |
| Engine Coolant Temperature (ECT) Sensor (3.8L VIN 1) | Top left rear of engine, below throttle body. See Figure . |
| Fuel Pump & Sender Assembly | In fuel tank. |
| Fuel Tank Pressure Assembly | In fuel tank. |
| Heated Oxygen Sensor 1 | In right bank exhaust manifold. |
| Heated Oxygen Sensor 2 | In exhaust system, rear of catalytic converter. |
| Intake Air Temperature (IAT) Sensor (3.1L VIN J) | Left front of engine compartment, in air cleaner duct. |
| Intake Air Temperature (IAT) Sensor (3.8L VIN K) | Left front of engine compartment, in air cleaner duct. See Figure . |
| Intake Air Temperature (IAT) Sensor (3.8L VIN 1) | Left front of engine compartment, in air cleaner duct. See Figure . |
| Knock Sensor (KS) (3.1L VIN J) | Lower left side of engine, above oil filter. See Figure . |
| Knock Sensor (KS) Bank 1 (3.8L VIN K) | Right side of engine, above starter. See Figure . |
| Knock Sensor (KS) Bank 1 (3.8L VIN 1) | Right side of engine, above starter. See Figure . |
| Knock Sensor (KS) Bank 2 (3.8L VIN K) | Right side of engine, below exhaust manifold. |
| Knock Sensor (KS) Bank 2 (3.8L VIN 1) | Right side of engine, below exhaust manifold. |
| Manifold Absolute Pressure (MAP) Sensor (3.1L VIN J) | Top right side of engine, above valve cover. |
| Manifold Absolute Pressure (MAP) Sensor (3.8L VIN K) | Top right side of intake manifold |
| Manifold Absolute Pressure (MAP) Sensor (3.8L VIN 1) | Top right rear of engine, above valve cover. See Figure . |
| Mass Airflow (MAF) Sensor (3.1L VIN J) | Top rear of engine, in air cleaner duct. |
| Mass Airflow (MAF) Sensor (3.8L VIN K) | Top rear of engine, part of throttle body assembly. See Figure . |
| Mass Airflow (MAF) Sensor (3.8L VIN 1) | Top rear of engine, part of throttle body assembly. See Figure . |
| Throttle Position (TP) Sensor (3.1L VIN J) | On throttle body assembly. See Figure . |
| Throttle Position (TP) Sensor (3.8L VIN K) | On throttle body assembly. See Figure . |
| Throttle Position (TP) Sensor (3.8L VIN 1) | On throttle body assembly. See Figure . |
| Vehicle Speed Sensor (VSS) (3.1L VIN J) | Lower right side of engine compartment, on transaxle. |
| Vehicle Speed Sensor (VSS) (3.8L VIN K) | Lower right side of engine compartment, on transaxle. See Figure . |
| Vehicle Speed Sensor (VSS) (3.8L VIN 1) | Lower right side of engine compartment, on transaxle. See Figure . |
| Wheel Speed Sensor (Left Front) | On left front bearing & hub assembly. |
| Wheel Speed Sensor (Left Rear) | On left rear bearing & hub assembly. |
| Wheel Speed Sensor (Right Front) | On right front bearing & hub assembly. |
| Wheel Speed Sensor (Right Rear) | On right rear bearing & hub assembly. |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.