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Manual First

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. With the vehicle stopped, move the gearshift lever to 1st.
  2. Accelerate the vehicle to 20 MPH.
  3. Verify no upshifts occur, the TCC does not apply and there is no noticeable slip, noise, or vibration.
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