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 MANUALSCHEVROLET1999ASTRO VAN 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDATA LINK CONNECTORDESCRIPTION AND OPERATION
1999 Chevrolet Astro Van 2WD V6-4.3L VIN W
Data Link Connector: Description and Operation
1999 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Description and Operation
A scan tool can connect to the Data Link Connector (DLC). The connection allows the scan tool to communicate with the following components:
^ The Vehicle Control Module
^ The Passlock Module
^ The Supplemental Inflatable Restraint Sensing Diagnostic Module
^ The Electronic Brake Control Module
^ The Automatic Transfer Case Shift Control Module
^ The Compass and Temperature Display Module in the Overhead Console
You can then monitor the system operations for the diagnostic purposes.
^ The Vehicle Control Module
^ The Passlock Module
^ The Supplemental Inflatable Restraint Sensing Diagnostic Module
^ The Electronic Brake Control Module
^ The Automatic Transfer Case Shift Control Module
^ The Compass and Temperature Display Module in the Overhead Console
You can then monitor the system operations for the diagnostic purposes.
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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.