Hey Scotty I got a 2001 gmc Sierra 6.6 LB7 turbo diesel and when my coolant revisor tank is full it spits it out trucks low coolant light comes on it does not over heat I did do a Head Gasket test and it showed it was fine however there are constant bubbles in the tank and the upper radiator hose does stay hard even when left parked overnight.
- Hey Scotty I got a 2001 gmc Sierra 6.6 LB7 turbo diesel and when my coolant revisor tank is full it spits it out trucks low coolant light comes on it does not over heat I did do a Head Gasket test and it showed it was fine however there are constant bubbles in the tank and the upper radiator hose does stay hard even when left parked overnight.
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Well it shouldn't bubble if it's bubbling it is overheating or your head gasket is blowing. So do my video how to tell if your head gasket is blown Scotty. Watch that on YouTube and see if it is blown. If not it is overheating. You'll have to figure out why should never get bubbles there
