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.
2004 GMC Jimmy (CANADA) V6-4.3LFACTORY OEM SERVICE PROCEDURE
Knock Sensor: Service and Repair
KNOCK SENSOR (KS) REPLACEMENT
REMOVAL PROCEDURE
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Remove the distributor.
3. Remove the fuel pipes.
4. Disconnect the knock sensor harness connector (3).
5. Remove the knock sensor retaining bolt (1).
6. Remove the knock sensor (2).
INSTALLATION PROCEDURE
NOTE: Refer to Component Fastener Tightening Notice in Service Precautions.
1. Install the knock sensor (2) and bolt (1).
Tighten
Tighten the sensor to 25 N.m (18 lb ft).
2. Connect the knock sensor harness connector (3).
3. Install the fuel pipes.
4. Install the distributor.
5. Connect the negative battery cable.
REMOVAL PROCEDURE
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Remove the distributor.
3. Remove the fuel pipes.
4. Disconnect the knock sensor harness connector (3).
5. Remove the knock sensor retaining bolt (1).
6. Remove the knock sensor (2).
INSTALLATION PROCEDURE
NOTE: Refer to Component Fastener Tightening Notice in Service Precautions.
1. Install the knock sensor (2) and bolt (1).
Tighten
Tighten the sensor to 25 N.m (18 lb ft).
2. Connect the knock sensor harness connector (3).
3. Install the fuel pipes.
4. Install the distributor.
5. Connect the negative battery cable.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no 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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.