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.
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HOMESERVICE MANUALSCHEVROLET1994C 2500 SUBURBAN 2WD V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSKNOCK SENSORSERVICE AND REPAIR
1994 Chevrolet C 2500 Suburban 2WD V8-350 5.7L
Knock Sensor: Service and Repair
1994 Chevrolet C 2500 Suburban 2WD V8-350 5.7LSECTION Service and Repair
REMOVAL:
- Disconnect battery cable.
- Drain cooling system.
- Disconnect wiring harness connector from knock sensor.
- Remove knock sensor.
INSTALLATION:
- Install knock sensor. Apply water base caulk to sensor threads. Do not use silicon tape as this will insulate sensor from engine. Tighten to 19 Nm (14 lb. ft.).
- Connect wiring harness connector to knock sensor.
- Connect negative battery cable.
- Refill cooling system and pressure test for leaks.
- Disconnect battery cable.
- Drain cooling system.
- Disconnect wiring harness connector from knock sensor.
- Remove knock sensor.
INSTALLATION:
- Install knock sensor. Apply water base caulk to sensor threads. Do not use silicon tape as this will insulate sensor from engine. Tighten to 19 Nm (14 lb. ft.).
- Connect wiring harness connector to knock sensor.
- Connect negative battery cable.
- Refill cooling system and pressure test for leaks.
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:
- • 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.