Yukon HEAT PROBLEM............?

Old 11-21-2010, 01:24 PM
  #1  
bbchevy
Senior Member
RACING JUNKIE
Thread Starter
 
Join Date: Mar 2003
Location: Fountain,MICHIGAN
Posts: 856
Default Yukon HEAT PROBLEM............?

Any GM TECHS out there?
2004 GMC Yukon 5.3
Climate Control,Frt.and rear Air and Heat.
Problem started about a month ago?
The Temp gauge stated showing a eratic Indication?Sometimes would stay on 160 and others would just move all over?I figured the Sending unit was going bad?But,I n the mean time,My wife said the Heat was'nt RITE?The Blower would NOT Blow at all and the Heat was ONLY when you are going down the Road?Basically.its a Gravity FEED!
So,Today?I changed the Temp sending Unit,and the Gauge Still does NOT Work?But,Both Heater hoses are HOT?But the bottom radaitor hose is fairly Cool?So,I changed the T/Stat.BUT,that did NOT change a Thing?
Any IDEAS?
I figure its a Heater Control switch,under the Dash,MAYBE>?
Just Not up on the Late Model S#!T?
Any HELP?Would be GREATLY Appreciated!!!
THANKS!
Greg 8)
bbchevy is offline  
Old 11-21-2010, 02:29 PM
  #2  
waynesworld154
Member
CRAFTSMAN
 
Join Date: May 2007
Posts: 60
Default

sent u pm would take forever to type the process to fix give me a call will walk u through it thanks
waynesworld154 is offline  
Old 01-01-2011, 10:36 AM
  #3  
blowninjected540
Senior Member
EXPERT BUILDER
 
Join Date: Mar 2007
Location: Michigan
Posts: 379
Default

Have the problem with my 99 yukon all of a sudden can you clue me in on whats wrong ??????
blowninjected540 is offline  
Old 01-01-2011, 04:12 PM
  #4  
dragonmaster093
Senior Member
RACING JUNKIE
 
Join Date: Mar 2009
Location: kingsport tn
Posts: 1,729
Default

as for heater there is a little circut bord in the duct work on pass side held in with 2 or 3 bolts and a wire harness this little booger tells the fan to kick or and blow in low med hi ect try changing it
dragonmaster093 is offline  
Old 01-01-2011, 04:44 PM
  #5  
mopar1968
Senior Member
RACING JUNKIE
 
mopar1968's Avatar
 
Join Date: Dec 2006
Location: Abingdon,Virginia
Posts: 3,578
Default

Sam that is the blower motor resistor :!:
mopar1968 is offline  
Old 01-01-2011, 04:49 PM
  #6  
TheYellaBrick
Senior Member
RACING JUNKIE
 
TheYellaBrick's Avatar
 
Join Date: Mar 2008
Location: Emmett, Idaho
Posts: 7,334
Default

Maybe it's 'resisting' too much ?? :P :P
TheYellaBrick is offline  
Old 01-01-2011, 08:34 PM
  #7  
dragonmaster093
Senior Member
RACING JUNKIE
 
Join Date: Mar 2009
Location: kingsport tn
Posts: 1,729
Default

yea i know just had a seinor moment changed about 20 in 2yrs comon problem in all makes
dragonmaster093 is offline  
Old 01-02-2011, 02:52 AM
  #8  
blowninjected540
Senior Member
EXPERT BUILDER
 
Join Date: Mar 2007
Location: Michigan
Posts: 379
Default

Thanks you I'll give it a try.
blowninjected540 is offline  
Old 01-02-2011, 10:18 AM
  #9  
dragonmaster093
Senior Member
RACING JUNKIE
 
Join Date: Mar 2009
Location: kingsport tn
Posts: 1,729
Default

also after losts of thinking these are dexcol motors (dexcol coolant) might have restricted coolant passages because dexcool does bad things to orings and other parts try back flushing and plain old flushing and use your favoritee brand of anti freeze to replace because after talking to a prestone rep a couple years ago any antifreeze made in the last 6 or so years has been formulated to modern standards with out nasty results of dexcol and some other factory coolants
dragonmaster093 is offline  
Old 01-04-2011, 02:18 PM
  #10  
blowninjected540
Senior Member
EXPERT BUILDER
 
Join Date: Mar 2007
Location: Michigan
Posts: 379
Default

I dont have a problem with the blower motor works fine low' medium' fast my Problem is the mode switch for defrost, feet, or vent switch don't do anything or let any heat into the vehical, nor does the A/C botton works anymore nor the recirculation switch works any ideas
blowninjected540 is offline  

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -