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 MANUALSCHEVROLET1995BLAZER 4D UTILITY, AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - 4.3LTROUBLE CODE CHARTSCODE 43, KNOCK SENSOR W/O SPARK MODULE (DUAL SENSORS)NOTES
1995 Chevrolet Blazer 4D Utility, AWD
Code 43, Knock Sensor W/O Spark Module (Dual Sensors): Notes
1995 Chevrolet Blazer 4D Utility, AWDSECTION Notes
NOTE:
Test numbers refer to test numbers on diagnostic chart.
- Tests for 5-volt signal applied by control module.
- An improperly installed sensor can prevent knock sensor from grounding to block.
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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.