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 MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 17 (ENGINE CONTROLS - REMOVAL, OVERHAUL & INSTALLATION - 5.7L)COMPUTERIZED ENGINE CONTROLSKNOCK SENSOR (KS) MODULEREMOVAL & INSTALLATION
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Removal & Installation
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Removal & Installation
WARNING: This page is about a different variant/trim than selected.
- KS module is located in PCM. Disconnect negative battery cable. Remove PCM from vehicle. See POWERTRAIN CONTROL MODULE (PCM) under COMPUTERIZED ENGINE CONTROLS. Position PCM with access cover up. Remove access cover from PCM.
- Using thumb and forefinger, squeeze both ends of knock sensor module inward and pull module up from access hole. To install, reverse removal procedure. Ensure module latches into holder in PCM.
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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.