Transmission Fluid Leak, Erratic Shifting on GMC G2500

Problem overview

On the 4L80-E Transmission (Diesel and 7.4L gas engine), Transmission fluid may leak through the electrical connector on the side of the transmission, damaging the wire harness and causing the transmission to shift erratically. Our technicians tell us there are updated shift solenoids, an internal transmission harness, and a connector pigtail available to correct this fault.

GMC G2500 vehicles with this problem

3 model years affected

Average mileage: 108,000 miles

(108,000 - 108,000)

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Transmission Fluid Leak, Erratic Shifting on GMC G2500

Problem overview

GMC G2500 vehicles with this problem

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