2019+ Silverado/Sierra 1500 w/ 8L90 Transmission Fluid Thermal Bypass Valve PPE Diesel Components Since its introduction

Since its introduction

Transmission: Allison 1000|Allison 2000

This new Digital design allows you to set high and low RPMs quickly and easily without changing pills or chips

Comes with Mounting Hardware

The inner layer of the heat shield can handle over 2000 degrees Fahrenheit of direct heat

2019+ Silverado/Sierra 1500 w/ 8L90 Transmission Fluid Thermal Bypass Valve PPE Diesel Components Since its introductionTransmission Fluid Thermal Bypass Valve Add another measure of protection and increase fluid flow to the transmission cooler. Increase cooling capacity with this easy to install billet aluminum PPE Transmission Fluid Thermal Bypass Valve for the GM 8L90 8 Speed transmission. The OEM part has restrictive internal passages. When the OEM valve fails in the closed position, transmission fluid doesn't reach your cooler. This can be caused by mechanical