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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1658 (Engine Control System & Fuel System - 6.6L (LMM) - Troubleshooting And Diagnosis) >> High Idle Switch Diagnosis >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON, observe the scan tool High Idle switch parameter while exercising the switch. The reading should change between ON/OFF.

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