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Home >> Cadillac >> 2009 >> Escalade EXT >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 244 (Cellular Systems, Entertainment Systems & Navigation Systems) >> Diagnostic Information and Procedures >> OnStar Button LED Malfunction >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2010 GMC Yukon XL, 2010 GMC Yukon, 2010 Chevrolet Tahoe, 2010 Chevrolet Suburban, and 2010 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, command the Green LED ON and OFF with a scan tool while observing the green LED on the inside rearview mirror. The green LED should turn ON and OFF when commanded.
  2. Command the red LED ON and OFF with a scan tool while observing the red LED on the inside rearview mirror. The red LED should turn ON and OFF when commanded.
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