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Scan Tool Diagnostics

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Scan Tool (Tech 2) reads and clears current and history codes. Ensure scan tool contains correct software cartridge for SIR diagnostics. Connect scan tool to Data Link Connector (DLC), located under left side of instrument panel. Plug in scan tool power leads to power source. Turn ignition on. Follow scan tool manufacturer instructions.