bubbles in the overflow bottle indicate air being pumped into the water. The most likely causes are either a blown head or intake gasket.
the thermostat probably went bad try to change it or take it out and see if it that helps.
over charging or bad bearings its about to let you stranded change it
That is usually a result of a plugged filter
Need to replace the ingnetion module in the distributor.
I get 300 miles on full tank, this is based on mainly highway driving(70mph) and some in town driving.
it is normally located above the overflow bottle on the passenger side. it has three 10mm bolts that hold it down and several plugs. four large ones and a small one
Sticky/stuck caliper slides, sticky/stuck caliper piston, collapsed brake hose, pinched brake line,
Check wheel bearings.
That's usually a good place for it, as well as the overflow reservoir. It wouldn't do you much good to put it in the windshield washer reservoir, the oil pan, or the fuel tank, after all.
because it needs serviced.
my 98 does the same but not with a/c on. I have only found fuel filter/pump suggestion as with 96 blazer stalling while driving. Will check out and let you know.
if u run your blazer low on gas quite a bit you probably burnt up ur fuel pump which is in the tank not a fun job. Good luck