Question about 1998 GMC Jimmy
I just changed my theromstat and it still over heated then we put a flush kit in the jimmy ran it for like 3 days to total 7 hours of running it. And we flushed thru the block til it ran clear water. And i drove it down 3 blocks and it started over heating. What else can be the problem.
Damaged impeller on the water pump, or a leaking head gasket ?
Is the fan clutch working correctly ?
Posted on Aug 30, 2012
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Posted on Jan 02, 2017
You dont have to flush the fluid because transmission fluid has detergents in it that will clean the transmission.You need to go ahead and by a transmission filter, its only abou 20 dollars and it will come with the transmission pan gasket. All you need is the filter and fluid and a catch pan and you can do it in your front yard if you want to. I hope that helps you out!
Posted on Jul 17, 2009
SOURCE: 2000 GMC Heater Problem
I had problems with a similar truck,a 1998 GMC diesel after checking to make sure the control cables were operating the blend door and blowing the mess of the heater core,I replace the thermostats.Still no heat turns out there was a small amount of debris collecting in the fitting for the inlet hose at the thermostat housing after removing it and blowing out the lines the heat was fine.
Posted on Dec 05, 2008
sounds like the same problem i was just having try changing out your fuel regulator its pretty pricey try to find the cheapest around $75.
Posted on Apr 07, 2009
Flushing the heater core is fairly easy just remove the 2 hoses going to the heater core and use a different hose if you have to and use a garden hose to backflush the blockage out..this may take as much as 5-6 times also check for vacumn lines missing or disconnected or breaks pinched ect... some where in the vicinity of the passenger side under hood by the a/c lines ect. good luck hope this helps
Posted on Dec 07, 2009
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Engine Overheats and heater blowing cold?
Heat blows cold on drivers side and hot on passenger side?
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