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 MANUALSGMC1995PICKUP C2500, 2D PICKUP, 7.4 N, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - 5.0LTROUBLE CODE CHARTSCODE 72, VSS CIRCUIT LOSS TRANS OUTPUT SIGNALNOTES
1995 GMC Pickup C2500, 2D Pickup, 7.4 N, Automatic
Code 72, VSS Circuit Loss Trans Output Signal: Notes
1995 GMC Pickup C2500, 2D Pickup, 7.4 N, AutomaticSECTION Notes
VSS output sensor is a magnetic induction type. Gear teeth pressed on outside diameter of output carrier assembly induce an alternating current in sensor when drive wheels are turning.
NOTE:
Test numbers refer to test numbers on diagnostic chart.
- Test verifies VSS voltage at control module.
- Test checks VSS buffer ground circuit.
- Test checks VSS circuit at buffer module.
- Test verifies VSS signal at sensor.
RENDER: 1.0x
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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.