Diagnostic Aids
WARNING: This page is about a different car, the 2002 GMC Yukon XL, 2002 GMC Sierra, 2002 Chevrolet Suburban, and 2002 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Verify that the transmission meets the shift speed specifications. See SHIFT SPEED SPECIFICATIONS under PERFORMANCE TESTS.
Other internal transmission failures may cause more than one shift to occur. The customer may complain of an engine over-rev condition or neutral condition in 4th gear. DTC P0757 defaults to an elevated line pressure condition which may result in TCC partial apply. This may induce idle surge and engine stall.