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 MODULETESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESDATA LINK CONNECTOR (DLC)
1998 GMC Envoy 2WD V6-4.3L VIN W
Data Link Connector (DLC)
1998 GMC Envoy 2WD V6-4.3L VIN WSECTION Data Link Connector (DLC)
The 16 pin DLC is wired to the body control module. The 16-pin DLC is located under the dash panel on the left side. The DLC connector has terminals that are used in order to connect to a scan tool. The following list shows some common uses of the scan tool:
^ Identifying stored Diagnostic Trouble Codes (DTCs)
^ Clearing DTCs
^ Performing output control tests
^ Reading serial data
^ Identifying stored Diagnostic Trouble Codes (DTCs)
^ Clearing DTCs
^ Performing output control tests
^ Reading serial data
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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.