2001 DURAMAX LB7
 

THE EGR COOLLER IS LEAKING INTO HEADS THRU THE EXHAUST PIPE COMING FROM THE EGR COOLER NEED TO KNOW HOW TO FIX THIS PROBLEM SHOULD WE REPLACE IT OR WHAT, SOME OF THE OTHER POST SAID SOME THING ABOUT BLOCKING OFF THE EGR COOLER ????????

There is no egr on a 2001 duramax. prolly a blown hg

if it was a head gasket the oil would have water in it ?????????

sometimes yes. one way to tell if it has bad injector cup seals is to pull the glowplugs after the truck has been sitting over night and see if coolant comes out of the holes when turning the engine over.

have you done a compression test?