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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 102 (Automatic Transmission Diagnosis - 4L60-E) >> Performance Tests >> Road Test >> Part Throttle Detent Downshift

Part Throttle Detent Downshift

WARNING: This page does not describe the selected car, but rather 36 other vehicles, including the 2002 Pontiac Firebird, 2002 Oldsmobile Bravada, 2002 GMC Yukon XL, 2002 GMC Yukon, and 2002 GMC Sonoma. However, it is still accessible from the selected car via links, so may be relevant.
  1. Place the gearshift lever in the Overdrive position.
  2. Accelerate the vehicle to 40-55 MPH in 4th gear.
  3. Quickly increase throttle angle to greater than 50 percent.
  4. Verify the TCC releases and transmission downshifts immediately to 3rd gear.
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