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 MANUALSGMC1998ENVOY 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSBODY CONTROL MODULETESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESSCAN TOOL DATA DEFINITIONSINPUT 2AUTO HEADLAMPS ENABLE

1998 GMC Envoy 2WD V6-4.3L VIN W

Auto Headlamps Enable

1998 GMC Envoy 2WD V6-4.3L VIN WSECTION Auto Headlamps Enable

Input 2:

Range: YES/ NO
The output refers to the BCM commanded state of the auto headlamp feature.

YES displays when the BCM commands the auto headlamps to turn ON.

NO displays when the BCM commands the auto headlamps to turn OFF.

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.