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 SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSBODY CONTROL MODULEDESCRIPTION AND OPERATIONBODY CONTROL SYSTEM CIRCUIT DESCRIPTIONINADVERTENT POWER RELAY
1998 GMC Envoy 2WD V6-4.3L VIN W
Inadvertent Power Relay
1998 GMC Envoy 2WD V6-4.3L VIN WSECTION Inadvertent Power Relay
The BCM turns OFF the inadvertent power relay after 20 minutes in order to preserve the battery power.
The 20 minute timer starts after any one of the following actions occurs:
^ The ignition switch is turned from RUN or START to UNLOCK, LOCK or ACC.
^ The illuminated entry is activated.
^ The interior lamps switch is turned ON.
^ The lift glass is opened or closed.
^ The underhood lamp is activated.
^ The vanity lamp is activated.
^ The courtesy lamp is activated.
^ The dome lamp is activated.
^ The glove compartment lamp is activated.
^ The reading lamp is activated.
^ The inside rear view mirror lamp is activated.
If any one of the following inputs reoccur during the 20 minute timer period, the timer is reset to 20 minutes:
^ The ignition switch is turned from RUN or START to UNLOCK, LOCK or ACC.
^ The illuminated entry is activated.
^ The interior lamps switch is turned ON.
^ The lift glass is opened or closed.
^ The courtesy lamp is activated.
^ The dome lamp is activated.
The 20 minute timer starts after any one of the following actions occurs:
^ The ignition switch is turned from RUN or START to UNLOCK, LOCK or ACC.
^ The illuminated entry is activated.
^ The interior lamps switch is turned ON.
^ The lift glass is opened or closed.
^ The underhood lamp is activated.
^ The vanity lamp is activated.
^ The courtesy lamp is activated.
^ The dome lamp is activated.
^ The glove compartment lamp is activated.
^ The reading lamp is activated.
^ The inside rear view mirror lamp is activated.
If any one of the following inputs reoccur during the 20 minute timer period, the timer is reset to 20 minutes:
^ The ignition switch is turned from RUN or START to UNLOCK, LOCK or ACC.
^ The illuminated entry is activated.
^ The interior lamps switch is turned ON.
^ The lift glass is opened or closed.
^ The courtesy lamp is activated.
^ The dome lamp is activated.
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.