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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 144 (Automatic Transmission - 6L50/6L80/6L90 - DTC P0218 To DTC P0977) >> DTC P0776 or P0777 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Cadillac Escalade EXT, 2007 Cadillac Escalade ESV, and 2007 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform the Transmission Fluid Checking .
  2. Operate the vehicle in drive with the calculated throttle position greater than 15% to obtain 72 km/h (45 mph).
    • If the DTC resets, go to Circuit/System Testing.
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