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Home >> Hummer >> 2007 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 1159 (Automatic Transmission - 6L50/6L80/6L90 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Diagnostic Information and Procedures >> Road Test >> Coasting Downshifts

Coasting Downshifts

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Place the gear selector in the DRIVE position.
  2. Accelerate the vehicle to 6th gear with the TCC applied.
  3. Release the throttle and apply the brakes
  4. Verify the following:
    • The TCC releases (on most applications).
    • Downshifts occur as commanded.
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