My truck ('01 gmc 2500HD) has started to give me the "Low Coolant" light. I replace the coolant but it disappears some place I can't find. there are no leaks under the truck, even after 4 days. Also, there seems to be alot of air in the cooling system. Any idea? thks!

 

Chances are is that its pushing out the over flow. which would mean blown headgasket. I say this from recent experiance

 

ditto

 

yeah it sounds that away

 

Well, I wanted a truck I could play with. Guess I got my wish! Thanks for the info!

 

Let the journey begin

 

have fun

 

If your pulling motor to do job and has high milage, you may want to consider doing and LBZ shortblock with cut LB7 pistons. and Head studs of course.

 

Gonna try NOT to pull the engine. If I do, there are MANY things that are going to change

 

check the seals and gaskets. chances are seal is shot somewhere.