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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1661 (Engine Control System & Fuel System - 6.6L (LMM) - DTC P1448 Top DTC P2510) >> DTC P2266 >> Circuit/System Testing

Circuit/System Testing

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.
  1. Turn OFF the ignition and disconnect the water in fuel sensor.
  2. Turn ON the ignition and clear the DTC.
  3. Start and run the engine.