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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 936 (Engine Controls And Fuel - 6.6L (LMM) - DTC P02E0 To DTC P154A) >> DTC P0506 or P0507 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Engine running, compare the scan tool Desired Idle Speed parameter to the Engine Speed parameter. Both engine speed parameters should be within 50 RPM of each other.
  2. Elevate the engine speed in 25 RPM increments to 1,300 RPM using a scan tool. With each commanded increment, the actual Engine Speed parameter should stay within 25 RPM of the commanded speed.
    • If the vehicle passes the Circuit/System Verification Test, operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records list.
  3. Engine running, observe the DTC information with a scan tool. DTCs P0506 or P0506 should not set.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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