Question about 1995 GMC Jimmy

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My 1995 gmc jimmy over heats when i run the ac good on coolant and fliuds is it a thermostat? and where is it in my coolant system?

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CHeck the drive belt perhaps it is loose and when you put the extra load on the coolant system the fan is not moving enough air to cool the engine. There could also be a blockage in the radiator core. THe water pump may also be faulty

Posted on Jun 22, 2010


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I noticed overheating, no warm air when heat was turn on. ? is the t-stat stuck close or water pump gone? checked hoses in and out of the heater core from under the hood and they were not hot nor felt like...

Well if the thermostat was stuck closed, the engine and the heater would get hot but the coolant would not flow thru the radiator.
If the cooling system is full of fluid, and the engine is running hot, and the heater hoses are cold, I would say the water pump has failed or you have another kind of restriction.

Jan 04, 2013 | 1995 GMC Jimmy

1 Answer


Usually a blend door problem.
The system is designed to default to the defrost position for safety.
If the blend doors are vac operated, look for a vac leak.
If electric, look for a failed motor or stuck door.

Jul 07, 2012 | 1995 GMC Jimmy

1 Answer

My 1995 GMC Jimmy is overheating.. it had a leak and we found that it was leaking coolant from the rear freeze plug that has been fixed no more leaking, but it still over heats we bought a new water pump,...

Check that the fan is turning in the right direction, in all the changes it is possible that you may have crossed the fan wires and not the fan is blowing forwards instead of backwards. Also check that there are no air locks in the system and that there is a positive flow of coolant.

Mar 08, 2011 | 1995 GMC Jimmy

1 Answer

My 1995 Jimmy keeps overheating, what can i do?

Most likely it is the thermostat. Remove the thermostat and see if that resolves the problem. It's fine to run the motor without one for short periods. If it does not over heat you know that's the problem. If it does overheat, replace the water pump.

Aug 18, 2010 | 1995 GMC Jimmy

1 Answer

Orifice tube location on a 1995 gmc jimmy

it is located in the high pressure AC line at the AC evaporator core inlet. The high pressure line is the smaller of the two AC lines that come from the AC compressor on the engine..

Mar 27, 2010 | 1995 GMC Jimmy

1 Answer

My 1995 jimmy shuts of with a check eng light on starts back up after 30 sec my brakes and abs also come on at the same time

Check the charging system,it needs to be 13.65 volts to14.25 volts output at the battery,with the ac/heat on high blower,and the headlights on,if it is lower than tis,then the alternator needs replacing.

Jan 30, 2010 | 1995 GMC Jimmy

1 Answer

I got a 1988 GMC Jimmy it needs a tune up and has

Wow, tough decision,
You need to determine why the over heating,are you losing coolant,if you are it could be anything from a radiator to water pump on the famous 4.3 intake leaking,if your not losing coolant,well it could be thermostat,head gasket,cooling fans .
And you didn't say why the tune up was needed,if its missing or a if the over heating and the tune up problem are related,But a good tune up just in parts will run $125.00
might be time to pack it's bags!

Dec 19, 2009 | 1988 GMC Jimmy

2 Answers

I have a 1995 jimmy and the heater dont work but it blows out cold air. what could be the problem

Start with the simple and replace the Thermostat, it take about 10 min to replace and make sure your coolant level is correct. Good luck and keep me posted, be glad to answer another questions you may have.

Dec 01, 2009 | 1995 GMC Jimmy

4 Answers


Did you replace the THERMOSTAT?? also make sure you get all the air out of system

Jan 01, 2009 | 1995 GMC Jimmy

2 Answers

200 gmc jimmy st heater

Had similar problem in my 2000 Jimmy. No hot air from heater. Had the shop (Midas) disconnect heater hoses at the fire wall and blow out the heater core with air hose. Got rust and junk blown out. Hooked up and flushed system with new anti freeze. Got lots of heat now.

Oct 25, 2008 | 2000 GMC Jimmy

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