Full Throttle Detent Downshift
WARNING: This page is about a different car, the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Place the gear selector in the OVERDRIVE position.
- Accelerate the vehicle to speeds of 64-88 km/h (40-55 mph) in FOURTH gear.
- Quickly increase throttle angle to 100 percent (WOT).
- Verify the following:
- The TCC releases.
- The transmission downshifts immediately to SECOND gear.