Thanks Norcal, I just need to find the right part number to order one now. I think it is 19256658 for the non-isolated part but would like to be sure before I order.
The online parts lookups all show the same pic which is the isolated part but have two different part numbers depending on cab style.
From what I can tell the reg cab and ex cab are isolated but the crew cab is non isolated ?
2011 2500HD Silverado Ex cab LTZ gasser2001 GMC 2500HD 8.1 Ex cab