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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 68 (Automatic Transmission Diagnosis - 4L80-E (Gasoline)) >> Diagnostic Tests >> DTC P0757: 2-3 Shift Solenoid Valve Performance >> Diagnostic Aids

Diagnostic Aids

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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.