Car Problem Reports

Chevrolet 1500 Pickup Check Engine Light With Code P1870

Chevrolet 1500 Pickup Problem
8 Reports
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Model Years Affected: 1996, 1997, 1998, 1999

Average Mileage: 177,812 mi (133,000 mi - 230,000 mi)


The transmission may develop a harsh 1-2 shift and/or illumination of the Check Engine Light with code P1870 stored. This can be caused by wear of the bore for the TCC isolator and regulator valves in the valve body. This condition does not commonly occur until the transmission reaches normal operating temperature. If the valve body is worn, replacement will be necessary to correct this concern.

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