2000 Tahoe front heater issue

[BigShowJoe]

2000 New Tahoe LS. Front heat is cold but rear heat is hot. After 30-45 min of driving, the front heat gets a slightly warm but never hot. Both lines connecting to the heater core are too hot to hold on to. Inlet seems a little hotter but the outlet is still very hot. I am assuming the blend door is working because even though the front is cold, there is still a noticeable, colder, difference when turning the knob from red to blue. Any help is appreciated.

 

[tonymac617]

Im having the same issue with my 2001 LT. Im trying to figure it out. I believe it could still be the Mix Door/Blend Door because when I cycle from cold to hot a few times, it seems that it gets a little warmer, especially when driving. Rear heat is hot. Hoping to pinpoint the issue this weekend. Ill post my findings.

 

[rockenthebowtie]

@ bigshowjoe, sounds like you may have a restricted heater core, you can try removing the smaller of the 2 heater hoses off the water pump and with a pressurized nozzle on your garden hose and see if you can clear it up by flushing it through the heater hose off the water pump

 

[rockenthebowtie]

@Tony yes yours does sound more like the blend door actuator

 

[jesse.vazquez81]

I have similiar issue but i hear a weird noise in the dash and its only when transitioning from hot to cold or vise versa , and takes a while to heat up in the front

 

[rockenthebowtie]

@jesse sounds like you may also have a blend door actuator issue

 

[jesse.vazquez81]

Hey im new to the forum and cant figure how to post and issue i have , any help?

 

[rockenthebowtie]

Hell I have no clue I never post anything other then just helping/replying on other threads already started lol