Best Transmission Cooler for a 2003 GMC Sierra 2500HD with 6.0L V8 Engine

Question:

I have a 2003 GMC 2500HD 6.0 and tow a 9,000 lb fifth wheel often. I want to install an auxiliary transmission cooler to help keep temps down because they usually run about 195-200 during the summer months. Which cooler will work best for my truck? Thanks.

asked by: Brent

Helpful Expert Reply:

For your 2003 GMC Sierra 2500HD with the 6.0L V8 engine, I highly recommend the Derale Series 8000 Plate-Fin Transmission Cooler Kit part # D13504. This 8000 series cooler measures 11" wide x 12" tall x 7/8" deep which will be a good fit for your truck. You can expect temperature drops anywhere from 20-30 degrees fahrenheit while using this cooler which will dramatically increase the life of your transmission.

Installation is very simple as you can see in the attached video but you will also need to use the Derale Radiator Adapter Fittings for GM part # D13018. Other than the radiator adapter fittings everything else you will need for installation is included with the transmission cooler.

expert reply by: Conner L