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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1148 (Automatic Transmission - 6L50/6L80/6L90 - DTC P0218 To DTC P0974) >> DTC P0601, P0602, P0603, P0604, or P062F >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start the engine.
  2. Let the engine run for 1 minute, then shut the engine OFF for at least 30 seconds.
  3. Retest for DTCs P0601, P0602, P0603, P0604, and P062F.
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