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Home >> GMC >> 2013 >> Yukon Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1101 (Automatic Transmission - 6L50/6L80/6L90 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Diagnostic Information And Procedures >> Road Test >> Part Throttle Detent Downshift

Part Throttle Detent Downshift

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. Place the gear selector in the DRIVE position.
  2. Accelerate the vehicle to 64-88 km/h (40-55 mph) in 6th gear.
  3. Quickly increase throttle angle to between 25-30 percent.
  4. Verify the following:
    • The TCC releases.
    • The transmission downshifts immediately.
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