Diagnostic Aids

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The SEO RAP relay is permanently soldered to the junction block-left I/P and is non-serviceable.
The RAP mode for the radio and door modules is a separate function and will still operate properly.
Use the DMM MIN/MAX function to capture/locate intermittent conditions.