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 MANAGEMENTRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSBODY CONTROL MODULETESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESSCAN TOOL DATA DEFINITIONSOUTPUTSDIMMING
1998 GMC Envoy 2WD V6-4.3L VIN W
Dimming
1998 GMC Envoy 2WD V6-4.3L VIN WSECTION Dimming
Outputs:
Range: ACTIVE/ INACTIVE
The dimming output refers to the state of the headlamp switch dimming feature.
The headlamp switch dimming feature is a term describing the customer's ability to control the illumination of the following components:
^ The instrument panel cluster
^ The radio
^ The HVAC controls
^ The PRNDL
^ The overhead console
^ The PSIR switch with the dome lamp switch (thumbwheel) near the headlamp switch
The up and down movement of the dome lamp switch allows the customer the ability to control the brightness of the components.
INACTIVE displays when the park lamps are OFF.
ACTIVE displays when the park lamps are ON.
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.