Remove and replace the failed intercooler in your 2001-2004 Chevy/GMC 6.6L LB7 Duramax and get your vehicle back on the road. When replacing your intercooler, you can find factory-style units as well as upgraded versions that offer increased strength to handle more pressure. The purpose of an intercooler on a turbo-diesel engine is to cool down the charge air after being compressed by the turbocharger. The intercooler cools this air before it enters the intake manifold. Shop today and find industry-leading brands like Banks Power, CSF, XDP, Mishimoto, and AFE.