Thread: 2005 GP little to no heat... and its winter

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  1. #1 2005 GP little to no heat... and its winter 
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    Firstly Hi everyone I'm not a GP owner, but my mother is and right now shes freezing in this below 30 degree temps we are having.

    Shes got a 2005 grand prix (base), the fan controls work on low to high, but the problem is only a little bit of heat comes out and its when the fans are barely blowing, as u ramp up the speed the temp drops fast. I changed the thermostat, and did a flush and still wasn't fixing it. There was dexcool coolant used but its fairly new in the system (last flush was in 2010). I touched the coolant lines and the ones that run into the firewall and they are all nice and warm with no temp differences. But the heat won't blow or work inside the cabin. So which leads me to believe something in the dash has failed.

    Any ideas as to what it could be? Should I try blowing air into the heater core hoses and see if that cures anything? Any links or DIY for removal of parts or testing of parts will be GREATLY appreciated since I'm clueless on GM cars.
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  2. #2  
    I live here. DirtDog's Avatar
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    Have u opened the bleeder screw o. Top of the thermostat to bleed the air outta the system? It also could be the blend door actuator that controls warm or cold air I believe

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  3. #3 Re: 2005 GP little to no heat... and its winter 
    Destroys cars izup69's Avatar
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    Quote Originally Posted by marines542 View Post
    Have u opened the bleeder screw o. Top of the thermostat to bleed the air outta the system?
    I would really check that. Haveing replaced my hole cooling system on my 06. alot of the time there is just air stuck in the heater core. May take a-while to bleed out the air. Just recently I replaced the water pump on my moms chevy malibu. I thought I had the system bleed turned the heat on and got cold air. Opend the bleeder valve back up and it spit air out for about 2 min. strait. After that had all the warm air I could handle. Sometimes its a pain to bleed.
    06 base open cone,2.5 inch dp into high-flow cat,window tint,drilled rotors.
    97 GTP ubend delete,drilled and slotted rotors,de-badged,open cone,6k HID,All aftermarket speakers
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  4. #4 Re: 2005 GP little to no heat... and its winter 
    Turbo is the way to go. BillBoost37's Avatar
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    Since the flush was done and you aren't hearing gurgling or seeing unusual engine temps, it sounds like the cooling system is good.

    I'd look to the blend door actuator. Look for full movement within 45 seconds of you changing the temp from low to high or vice versa.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  5. #5 Re: 2005 GP little to no heat... and its winter 
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    Quote Originally Posted by BillBoost37 View Post
    Since the flush was done and you aren't hearing gurgling or seeing unusual engine temps, it sounds like the cooling system is good.

    I'd look to the blend door actuator. Look for full movement within 45 seconds of you changing the temp from low to high or vice versa.

    how do I get access to this, I believe this might be a issue. I dont notice nothing changing lol
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  6. #6 Re: 2005 GP little to no heat... and its winter 
    GrandPrix Junkie spazzz's Avatar
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    Quote Originally Posted by GreekPower View Post
    how do I get access to this, I believe this might be a issue. I dont notice nothing changing lol
    might get you in the ballpark

    http://www.grandprixforums.net/blend...ent-21941.html
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  7. #7 Re: 2005 GP little to no heat... and its winter 
    Turbo is the way to go. BillBoost37's Avatar
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    The reason for my vagueness is I've never gone near one of that year. Otherwise I'd have a detailed write up with pics for you.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  8. #8 Re: 2005 GP little to no heat... and its winter 
    GrandPrix Junkie spazzz's Avatar
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    Quote Originally Posted by BillBoost37 View Post
    The reason for my vagueness is I've never gone near one of that year. Otherwise I'd have a detailed write up with pics for you.
    Bill do you have any how-to Vids up anywhere....?
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  9. #9 Re: 2005 GP little to no heat... and its winter 
    Turbo is the way to go. BillBoost37's Avatar
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    Spazz search on the word "e asy" without the space and my name.
    I drink..so consider that when reading my posts.

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  10. #10 Re: 2005 GP little to no heat... and its winter 
    GrandPrix Junkie spazzz's Avatar
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    I know Bill, I always grab them for my curious mind.

    I meant like You Tube-able ... miniseries stuff ya know.....
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  11. #11 Re: 2005 GP little to no heat... and its winter 
    GXP Level Member GTPpower's Avatar
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    I'm a little confused as to what your issue is here. Is it a lack of airflow, or just cold air?


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
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    A lack of heat from air vents

    Sent from my DROID RAZR using Tapatalk 2
    http://www.grandprixforums.net/my-06-gp-gxp-72403.html
    OBX headers, TEP tranny cooler, ls1 IM fuel rails and injectors, ls2 TB, ls7 MAF, full custom exhaust, Quad retro headlights, full out front and rear suspension work, tuned by HPT by me 8====>

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  13. #13 Re: 2005 GP little to no heat... and its winter 
    GXP Level Member GTPpower's Avatar
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    Quote Originally Posted by marines542 View Post
    A lack of heat from air vents

    Sent from my DROID RAZR using Tapatalk 2
    Does that mean a lack of airflow, or cold air is coming out?


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, tuned
    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
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  14. #14  
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    Quote Originally Posted by GTPpower View Post
    Does that mean a lack of airflow, or cold air is coming out?
    Cold air coming out. Read the post

    Sent from my DROID RAZR using Tapatalk 2
    http://www.grandprixforums.net/my-06-gp-gxp-72403.html
    OBX headers, TEP tranny cooler, ls1 IM fuel rails and injectors, ls2 TB, ls7 MAF, full custom exhaust, Quad retro headlights, full out front and rear suspension work, tuned by HPT by me 8====>

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  15. #15 Re: 2005 GP little to no heat... and its winter 
    GXP Level Member GTPpower's Avatar
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    Quote Originally Posted by GreekPower View Post
    the fan controls work on low to high, but the problem is only a little bit of heat comes out and its when the fans are barely blowing, as u ramp up the speed the temp drops fast.
    Quote Originally Posted by GreekPower View Post
    But the heat won't blow or work inside the cabin.
    This is what has me confused. Is it not blowing, or is it cold air?


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, tuned
    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
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  16. #16  
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    O I see now. Maybe he'll clarify when he gets on next

    Sent from my DROID RAZR using Tapatalk 2
    http://www.grandprixforums.net/my-06-gp-gxp-72403.html
    OBX headers, TEP tranny cooler, ls1 IM fuel rails and injectors, ls2 TB, ls7 MAF, full custom exhaust, Quad retro headlights, full out front and rear suspension work, tuned by HPT by me 8====>

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