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 MODULE
1998 GMC Envoy 2WD V6-4.3L VIN W
Body Control Module
1998 GMC Envoy 2WD V6-4.3L VIN WSECTION Body Control Module
Description and Operation- Body Control System Circuit Description
- Ambient Level Sensor
- Asleep States
- Audible Warnings
- Battery Rundown Protection
- Daytime Running Lamps (DRL) and Auto Headlamps
- Door Lock/Unlock Switch Function
- Driver Warning Telltales
- Exit Lighting
- Front Fog Lamps
- Illuminated Entry
- Inadvertent Power Relay
- Interior Illumination
- Lift Glass Release Function
- Lighting Control
- Lockout Prevention
- Passlock System
- Power Door Lock/Unlock Function
- Remote Function Actuator (Rfa)
- Remote Illuminated Entry
- Remote Lock
- Remote Panic Alarm
- Remote Unlock
- Retained Accessory Power (RAP)
- Wake-Up State
- Body Control System Operation
- Body Control System Circuit Description
Testing and Inspection- Initial Inspection and Diagnostic Overview
- Reading and Clearing Diagnostic Trouble Codes
- Scan Tool Testing and Procedures
- Class 2 Serial Data Communication
- Data Link Connector (DLC)
- Diagnostic Trouble Code (DTC) Diagnosis
- Scan Tool Data Definitions
- General Information
- Module Information 1
- Module Information 2
- Data
- Input 1
- Ignition 1
- Ignition 3
- Ignition Power Mode
- RFA Message Since Wake-Up
- Last RFA Cmd. Since Wake-Up
- Door Handle Switch
- Driver Door Jamb Switch
- Rear Passenger Door/ Lift Glass Jamb Switch
- Rear Gate/ Door
- Lift Glass Switch
- Key In Ignition
- Seat Belt Buckled
- Park Brake Switch
- RAP Relay Feedback
- Passenger Door Unlock Input
- Door Lock Relay Feedback
- Horn Relay Input
- Input 2
- Interior Lamp Request
- Headlamp Request Switch
- Headlamp Relay Feedback
- High Beam Switch
- Flash to Pass
- Park Lamps
- Daytime Running Lamps
- Left Turn Signal
- Right Turn Signal
- Front Fog Lamp Switch
- Rear Fog Lamp Switch (Export Only)
- Dome Lamp Switch
- Dome Override Switch
- Dim Pot Input
- Courtesy Lamp Relay
- Auto Headlamps Enable
- Auto Headlamps
- Outputs
- Security Data
- Scan Tool Data List
- Scan Tool Diagnosis
- Scan Tool Information Modes
- Programming and Relearning
Locations
Service and Repair
Diagrams- Diagram Information and Instructions
- Diagnostic Aids
- Connector Repairs
- General Electrical Diagnosis Procedures
- Wire Repair Procedures
- Connector Views
- Electrical Diagrams
- Ambient Light Sensor
- Courtesy Lamp Circuit
- Fog Lamp Relay
- Front Door Handle Switches
- Hdlp High Intensity Discharge Ballasts & High Beam Hdlp Bulbs
- Headlamp Switch
- Headlamp Switch and Headlamp Bulbs
- Hi Beam Relay, Multifunction Switch and Ignition Switch
- Ign Key Alarm SW
- Instrument Panel Cluster and Turn Signal Switch
- IP Fuse Block, UBEC and Splice Packs SP200 and SP202
- Passlock Sensor
- PCM/VCM and Splice Packs SP201
- Power Door Locks
- R/Side DR, Liftglass & Liftgate Ajar Jamb SWS
- Remote Control Door Lock Receiver
- UBEC, Steering Column Assembly and Horns
Technical Service Bulletins
Tools and Equipment
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.