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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1647 (Engine Control System & Fuel System - 4.8L, 5.3L, 6.0L, 6.2L - DTC P1255 To DTC P3449) >> DTC P3401, P3425, P3441, or P3449 >> 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.
    NOTE: DTC P3401, P3425, P3441, and P3449 sets with an open ignition circuit fuse.
  1. Ignition ON, command the appropriate cylinder deactivation solenoid ON and OFF while observing the following status parameters with a scan tool:
    • Cyl. 1, 4, 6, or 7 Deact. Sol. Ckt Open Test Status
    • Cyl. 1, 4, 6, or 7 Deact. Sol. Ckt Short Gnd Test Status
    • Cyl. 1, 4, 6, or 7 Deact. Sol. Ckt Short Volts Test Status

      Each parameter should display OK or Not Run

  2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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