2005 duramax:Heater quit working. in cab

[Tomslick]

Was driving to work this morning snug as a bug and all of sudden no heat. It was 27 degrees out and cab got cold quick. Water temp was 150 to 180. What gives? I just bought this truck Last week.

 

[02greysixer]

Check your coolant level. If it's at the proper level try cycling the key from on-off-on when/if it does it again. If that does it your blend door actuator(s) are failing.

 

[battlegraduate09]

Most likely blower motor resister under the glove box. Iv replaced many of them. But you can check fuses first

 

[Tomslick]

Fan blows

The fan still blows so I'm assuming that points to blend door actuators.

 

[c20elephant]

Here is some info about the blend air door, be sure and scroll to the bottom for a few more links.

http://www.sparkys-answers.com/2011/03/2004-chevrolet-silverado-dash-cover.html?m=1

 

[1ATony]

Thanks for joining

Tony:rockon:

 

[Tomslick]

Actually was low on coolant so that brought on a whole new problem. Seem as if the coolant system is under to much pressure and at times I'm losing coolant out of the overflow vent. Any suggestions? Maybe the cap?

 

[DAVe3283]

That's not good. Typically, when the coolant is under pressure and pushes out the cap, you have a blown head gasket. When you park the truck over night, is the radiator hose still hard the next morning, or has the pressure released?

 

[dirtydmax]

Sounds like you bought a bad head gasket,Get the truck cheap?

 

[Tomslick]

It has usually released by the next morning. But not everytime.
fairly cheap. What would you call cheap? Under 15k

 

[Tomslick]

How do I find out for sure if it's a head gasket??

 

[dirtydmax]

Do you have a warrantee ?Maybe it can be covered if you only got it last week.Pull the coolant tube,its the one that covers the thermostats and start it up after removing the stats.look for bubbles and that will give you your blown side.I would do both since your already there.