Part Throttle Detent Downshift
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Place the shift selector in DRIVE.
- Accelerate the vehicle to a speed just above the FOURTH to FIFTH shift point, using less than 50 percent throttle.
- Quickly increase throttle angle to greater than 63 percent.
- Verify the following conditions:
- The TCC releases.
- The transmission downshifts immediately to FOURTH range.