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Diagnostic Fault Information

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Ignition - Relay Coil P2688 P2687 - -
B+ - Relay Switch * *** - -
Control - Component * *** ** -
Control - Relay Coil P2688** P2687*** P2689*** -
Ground - Component - *** *** -
*Opens the fuse that supplies voltage to the component.
**Component = Always On
***Component = Always Off
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