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.DBβ LIVE
HOMESERVICE MANUALSPONTIAC2008GRAND PRIX V6-3.8LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSKNOCK SENSORSERVICE AND REPAIRKNOCK SENSOR 1 REPLACEMENT
2008 Pontiac Grand Prix V6-3.8L
Knock Sensor 1 Replacement
2008 Pontiac Grand Prix V6-3.8LSECTION Knock Sensor 1 Replacement
Knock Sensor 1 Replacement
Removal Procedure
Caution: Hot engine coolant may cause severe burns. Although the cooling system has been drained, coolant still remains in the engine water jacket. This coolant will drain with the removal of the knock sensor.
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair) .
2. Drain the cooling system. Refer to Cooling System Draining and Filling (L26 GE 47716 Fill) (Service and Repair)Cooling System Draining and Filling (L26 Static Fill) (Service and Repair) .
3. Disconnect the knock sensor electrical connector (2).
4. Remove the knock sensor (1).
Installation Procedure
Notice: Refer to Fastener Notice .
Important: DO NOT apply thread sealant to sensor threads. The sensor is coated at factory and applying additional sealant will affect the sensors ability to detect detonation.
1. Install the knock sensor (1).
Tighten the knock sensor to 19 N.m (14 lb ft).
2. Connect the knock sensor electrical connector (2).
3. Lower the vehicle.
4. Fill the cooling system. Refer to Cooling System Draining and Filling (L26 GE 47716 Fill) (Service and Repair)Cooling System Draining and Filling (L26 Static Fill) (Service and Repair) .
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.