WCFAB 2017-2019 L5P Duramax Transmission Cooler Thermostat Bypass Plug CP3 Pump 2017-2019 Chevrolet Silverado & GMC

2017-2019 Chevrolet Silverado & GMC Sierra 2500HD/3500HD with 6

this transmission cooler is backed up by our Lifetime Warranty with Accident Protection for worry-free cooling as long as you own it

In extreme cases the factory screen can actually tear

For those using their vehicle in extreme off-road situations

WCFAB 2017-2019 L5P Duramax Transmission Cooler Thermostat Bypass Plug CP3 Pump 2017-2019 Chevrolet Silverado & GMCThe stock thermostatic bypass for warming up the Allison quickly in cold weather conditions is a good idea in principle, but in practice we've seen the valve fail forcing trans fluid around the cooler in warm weather conditions that cause dangerous fluid temperatures for built and stock transmissions alike. We've been running this design on our shop development trucks and with our built transmissions successfully and are now making them available for