There are two different heater cores installed on 2015 GM trucks. The heater core piping coming from the firewall on 2011 to EARLY 2015 trucks will be 5/8"
Late model year 2015 trucks have a 3/4" outlet. Please make sure your vehicle has the smaller 5/8" outlet before ordering this part. If the 3/4" outlet is needed, please use part number 75115
DRP LML EGR Upgrade Kit for 11-15 LML Duramax
DRP's 11-15 EGR Upgrade Kit will address the EGR Valve and Cooler. You will need to modify your stock up-pipe or purchase Deviant's Passenger Side Up-Pipe - PT# 77110
CNC machined and anodized billet block off plate
Comes with all necessary parts and detailed instructions
3 out of 5 wrenches for installation
**Installing this will require Race Tuning to shut off the Check Engine LIght (MIL)
Product Use Disclaimer: These components have been designed and are intended for closed course competition only! It becomes the sole responsibility of the Customer to ensure that the use of their vehicle and items purchased comply with federal, state, and local regulations. Performance products are legal in California only for sanctioned closed course racing vehicles, which may never be used on a public highway. Customer assumes all risks and expenses relating to unlawful vehicle operation on public roads. By purchasing this product, you have agreed not to hold Deviant Race Parts, LLC liable for unlawful vehicle operation.