Join Date: Sep 2009
Location: Killeen, TX
Thanked 1,803 Times in 1,585 Posts
It appears to be a post turbo thermocouple for an EGT gauge.
97 3500, 2 WD, G56, slightly bombed, 1.3 million miles with un-additized diesel fuel. Started the second million on 8/24/13
If you are lucky enough to be in Texas, you are lucky enough.