Jump to content

Heat Problems

Nabromovich

Recommended Posts

Nabromovich Enthusiast

Nabromovich

Posted
Posted

So my 2000 Sierra 2500 6.0 heater sucks, about the month ago I disconnected the heater core hoses from the water pump and tried to blow out some of the junk I though was in it. Some stuff did come out and the heater was warm sometimes after that, then turned cold again after a week. So yesterday after having a wind chill of -11 I took it into a shop to get a coolent flush and that didn't work very well...My first thought is that there is still junk in the heater core and they didn't flush it very well, but of course they want me to pay the $700 to just replace it. Just wanted you opinion, thinking of taking it to get just the heater core backed flushed? What are your thoughts?

txab Senior Enthusiast

txab

Posted
Posted
bite the bullet just change it..its probly plugged

+1

 

It may be past flushing to clear it. It happens. Good reason to change coolant on a regular schedule.

sonjaab Senior Enthusiast

sonjaab

Posted
Posted

Are you sure its not a simple "blend door" issue?

Did you try a blend door reset? Common gmt-800 no heat issue.

 

$700 to replace the heater core is cheap! A GM dealer charges $1,100 bucks

because the entire dash has to come out!

Nabromovich Enthusiast

Nabromovich

Posted
  • Author
Posted
Are you sure its not a simple "blend door" issue?

Did you try a blend door reset? Common gmt-800 no heat issue.

 

$700 to replace the heater core is cheap! A GM dealer charges $1,100 bucks

because the entire dash has to come out!

 

I have not tried the blend door, I will give that a shot, what about a thrmostat, you think that could be it also?

jdubub Senior Enthusiast

jdubub

Posted
Posted

man that sucks...... sorry to hear that. My heater core went out in my hemi ram one winter a day before a huge winter storm came through. Hell...... I even had radiator fluid coming out of the floor vent when the heater was on. Wanted to do it myself until I figured out you have to take the whole entire dash apart. $700 later my ass hurt but I had heat. I would def check the blend door, if thats good Im willing to bet the damn heater core is out :(

sonjaab Senior Enthusiast

sonjaab

Posted
Posted

A bad thermostat would also cause overheating issues !

Are BOTH heater hoses equally hot to the touch at operating temp. ?

 

If so try:

 

Blend door reset:

Turn off heater controls.

Remove the 2 HVAC fuses from the underhood fuse center.

Wait 5 minutes.

Replace fuses

Turn key on. Do NOT touch heater controls!

 

You should hear blend door moving.............

 

DONE!

  • 10 months later...
DrAfterShock Enthusiast

DrAfterShock

Posted
Posted

Bumping an old post but wanted to share my fix for others searching on heater issues. I rarely need my heater in Louisiana but after a recent cold front I noticed the heater wasn't blowing hot air. I have a 2010 5.3L with 40k miles. My brother suggested the miles were too low to have clogs in the heater core and that it was probably related to blend door or actuator issues. I spent half an hour searching/reading about blend door reset procedures, then when I opened the hood I noticed the big plastic Vortec cover on the engine had crimped one of the heater core hoses. A few weeks prior I had done a routine throttle body cleaning and when I reinstalled the plastic cover, instead of sliding the back left corner under the heater hoses, I had put it on top and crimped the hose, probably preventing any decent flow of coolant through the heater core. A foolish mistake but at least easy and free to fix!

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.6k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    343,007
    Total Members
    8,960
    Most Online
    Brendan C
    Newest Member
    Brendan C
    Joined

  • Who's Online   3 Members, 0 Anonymous, 901 Guests (See full list)

  • Latest Articles

  • Posts

    • Grumpy Bear
      Joke Thread

      By Grumpy Bear · Posted

    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      You're better read than that Atlas. 😏   British science fiction writer Arthur C. Clarke formulated three adages that are known as Clarke's three laws, of which the third law – that "any sufficiently advanced technology is indistinguishable from magic" – is the best known and most widely cited.   Stribeck and the pivotable Hersey Number isn't voodoo nor snake oil. That part is physics. It's what marketing and bean counters do with it that is snake oil and voodoo.    Stribeck is the relationship between Hersey and the Coefficient of Friction. Within the Hersey Equation if viscosity and viscosity is 'Dependent' on.......heat.......and.......viscosity index or the temperature to viscosity slope.    Specifically Hersey is the viscosity AT THE TEMPERATURE IN THAT LOCATION FOR THAT SLOPE.   Hydrodynamic lubrication exist when the film thickness in the location is 3X the Ra roughness of the surface. This is irrespective of the hardness of the substrate. To obtain that thickness X viscosity is required for Y velocity at Z load. That's a lot of moving parts. It is also impossible to maintain in an ICE but nearly possible with a turbine under constant load.    What does that mean? Error heavy and operate light. Wear is inevitable but the rate of wear and the milage obtainable are a function of prevailing conditions and HABITS. The only penalty is viscous drag and at fractions so low as to be well worth the effort. Double the life, half the manufacturing carbon foot print. Greed is the only impediment.    The materials generated by SwRI are the RESULT not an estimation or a hypothesis.    Don't delude yourself sir, EV's have as many pitfalls as ICE's. We just don't know what they are yet and it will take longer to sort as MARKETING and GREEDY CEO's have had more time to polish the turd they are selling. 
    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      You can always count on greed to prey on ignorance and stupidity.    Friend bought a 2019 Ford Flex and asked me about using Valvoline R&P 5W30 in it. Told him give the miles on it and the fact it wasn't yet using oil that it was a good plan. He uses a Valvoline quick change shop for his oil service.   First they tell him that isn't the oil the OEM recommends. He told them he didn't care what the OEM thought. Then they floated the, "But it will void your warranty"    His reply was it's a 2019, there is no warranty and informed them their knowledge of the law was lacking.    Then they tell him 'But it will ruin your motor"!.    Mine to ruin he says. Finally they give in and charge him 150% the semi-syn price    Point it the brainwash is so embedded that even the service industry is drunk on their swill. The public is right behind them. Echoing the same lies on every forum and media platform. If the end goal is indeed EV then I'd say that ship is about built. 
    • CamGTP
      Gas Prices

      By CamGTP · Posted

      Diesel hit $6.00 here today at the truck stop.   Payed $2.79 for E85 today too.
    • richard wysong
      Electrical Problem - solved

      By richard wysong · Posted

      Thanks for posting, I'm sure it will help someone

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...