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.
2007 Chevrolet Uplander V6-3.9LFACTORY OEM SERVICE PROCEDURE
Coolant Temperature Sensor/Switch (For Computer): Locations
Engine Controls Component Views
Fuel Rail (LGD/LZ9)
1 - Fuel Injector 1
2 - Fuel Injector 3
3 - Fuel Injector 5
4 - Fuel Injector 6
5 - Engine Coolant Temperature (ECT) Sensor
6 - S142
7 - Fuel Injector 4
8 - Fuel Injector 2
9 - Crankshaft Position (CKP) Sensor
10 - C102
Rear of the Engine (LGD/LZ9)
1 - Throttle Actuator Control (TAC) Module
2 - Manifold Absolute Pressure (MAP) Sensor
3 - Ignition Control Module (ICM)
4 - Heated Oxygen Sensor (HO2S) 1
5 - Knock Sensor (KS) 1
6 - Block Heater
7 - Crankshaft Position (CKP) Sensor
8 - Engine Oil Level Switch
9 - Engine Coolant Temperature (ECT) Sensor
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.