2000 gmc jimmy pass side clicks and no heat?

[sunni]

sometimes heat comes on but then shuts off replaced the thermostat but no help...have to keep adding antifreeze but no leaks

 

[marvin]

first if your having to keep adding antifreeze, then you do have a leak somewhere, the clicking sounds like a broke actuator motor, which controls the hvac system , like hot or cold air, floor or defroster.

 

[marvin]

first if your having to keep adding antifreeze, then you do have a leak somewhere, the clicking sounds like a broke actuator motor, which controls the hvac system , like hot or cold air, floor or defroster.

 

[Molson02536]

sometimes heat comes on but then shuts off replaced the thermostat but no help...have to keep adding antifreeze but no leaks

Here is a link to help you with your heat issue. http://gmcowners.com/gmc-forum/showthread.php?t=15808

As for you losing coolant, you hay have a intake manifold gasket that has gone bad or you engine oil and even possibility of your transmission cooler gone bad and coolant is leaking into you engine or transmission.

Inspect your transmission fluid and engine oil for level and condition of the oil. When the coolers that is a part of the radiator go bad, coolant and the engine or transmission fluid will mix and work it's way in to those area.

Regardless, coolant in your engine or transmission is corrosive to the internal bearings used in both components. So it best you ensure that the issue is addressed if there is coolant mixing in with your fluids. If your lucky, it may just be a water pump starting to go bad and leaking through a weep hole from a bad bearing and will only leak as the engine is running.

Good luck and keep us posted and here is a link for the 2000 Jimmy on your heater actuator location to help you visualize it's location. #4 is the actuator your trying to replace. http://www.compnine.com/index.php?u...delid=6872&capuid=1&majorgroup=08&grouptype=B