Okay i have a 2000 gmc jimmy 2-dr, 4.3L V6. Every 3 or 4 weeks, i have to completely refill my radiator with coolant....BECAUSE IT DISSAPEERS!!! Its not leaking from any visible location so im guessing i have a blown head gasket. Although it has no water/coolant coming outta the exhaust and no smoke. DOES ANYONE HAVE ANY INFO ON DOING THIS I HAVE NEVER ATTEMTED ON A JIMMY!

 

Have you checked the appearance and level of your oil?

 

to me it sounds like u have a freeze plug blown out.

 

or intake leaking at front or rear

 

mine was doing the same thing. if you get under it, look real close. mine was leaking from the intake gasket in the back of the motor and i had to get in real close to see any leak, but it was there. it took me 7 hours to change

 

nope nothing in the oil and levels are fine. i am seeing slight leakage under the chassis. none out the exhaust either.