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.
2012 GMC Canyon 2WD L4-2.9LFACTORY OEM SERVICE PROCEDURE
Knock Sensor: Service and Repair
Knock Sensor Replacement
Removal Procedure
1. Raise and support the vehicle only high enough to access the knock sensor (KS) through the wheelhouse. Refer to Lifting and Jacking the Vehicle Service and Repair.
2. Remove the left wheelhouse liner. Refer to Front Wheelhouse Liner Replacement.
3. Disconnect the engine wiring harness electrical connector (3) from the KS (1).
4. Remove the KS retaining bolt.
5. Remove the KS (1) from the engine block.
Installation Procedure
Caution: Refer to Fastener Caution Fastener Caution.
1. Install the KS (1) and the retaining bolt to the engine block, positioning the electrical terminals rearward.
Tighten the KS bolt to 25 Nm (18 lb ft).
2. Connect the engine wiring harness electrical connector (3) to the KS (1).
3. Install the left wheelhouse liner. Refer to Front Wheelhouse Liner Replacement.
4. Lower the vehicle.
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.