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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 82 (Automatic Transmission Diagnosis - ALLISON) >> Performance Tests >> Road Test >> Part Throttle Detent Downshift

Part Throttle Detent Downshift

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Place the gearshift lever in the Drive position.
  2. Accelerate the vehicle to a speed just above the 4th to 5th gear shift point using less than 50 percent throttle.
  3. Quickly increase throttle angle to greater than 63 percent.
  4. Verify the TCC releases and transmission downshifts immediately to 4th gear.
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