Minimal hot air

Asked by Nov 19, 2016 at 10:40 AM about the 2008 Pontiac G6 GT Coupe

Question type: Maintenance & Repair

So I have a 2008 Pontiac G6 GT with the 3.5L V6.
Recently, I've found out I have an antifreeze leak
somewhere (haven't fixed it yet, just been adding
antifreeze every few weeks or so), but last night I
noticed my check engine light come on, and this
morning my remote start (factory) would work. So I
went and started manually, and realized after a bit
my temp gauge wasn't moving, I'm only getting like,
room temp/warm air, and the engine light was still
on. I read some posts on here, and checked my tire
pressure just in case that sensor was throwing
anything off.  Now, I'm a complete n00b when it
comes to under the hood, I know the basics, but
that's about it.  Any ideas on where start for the
heat? It's getting cold in MN and would prefer heat.
Any tips (laymen's terms and pics would be
appreciated) on the heating situation and how to
find an antifreeze leak would be greatly

3 Answers


Low coolant level will prevent the heater core from working. The heater core is of course the thing that provides cabin heat. The best way to find a coolant leak is to pop the hood and just get in there and look. Check the hose connections, run your hands along them feeling for wetness. Check the radiator itself, if it is leaking you may see coolant on the support. Check the ground after you've been parked for a while for coolant. Check the front of the engine (the side with the serpentine belt) for leaks near the water pump. One leak source that is hard to find is with the heater core itself, as that is inside the dash. If that is leaking, coolant may flow from the overflow tube to the ground. However the heater core may only be leaking when the car is running, so it won't always be obvious. The last and worst case scenario for losing coolant is a blown head gasket, but usually you have many more symptoms for those than you are describing here. The cost of repairing a leaky cooling system at a shop is fairly minimal so if not something you can do yourself, take it in somewhere. Don't let it get to the point of overheating the engine.

I guess my next question would be, if I just topped off the coolant and the temp gauge on the dash still isn't moving and it's still giving off warmish heat, what would I want to look at? Obviously fixing the leak is something I need to do. I guess my understand at this point is if there's coolant/antifreeze, it should provide heat and the temp gauge should still move, so shouldn't it work properly if the coolant is filled up?


Even if you have coolant, it doesn't mean there is coolant flow or at least adequate coolant flow, if the water pump if beginning to fail. Next time you have car running and warmed up, try squeezing the heater core hoses (these are about 1" in diameter and run to the firewall. They should be hot or warm to the touch and feel pressurized. If they're not, then you have no coolant flow to the heater core. If you think the cooling system is working (even with the leak) and still no heat, you can try a flow test on the heater core. If cooling system AND heater core are working, you may have a problem with the temperature blend door, which directs are across heater core or AC coil, depending on what temp setting you select.

Your Answer


Looking for a Used G6 in your area?

CarGurus has 2,911 nationwide G6 listings starting at $699.


Pontiac G6 Experts

  • #1
    Norm Davis
  • #1
  • #3
    Andy Huhn
View All

Related Models For Sale

Used Pontiac G8
4 Great Deals out of 352 listings starting at $4,900
Used Pontiac Grand Prix
1,920 listings starting at $3,000
Used Chevrolet Malibu
664 Great Deals out of 48,938 listings starting at $1,500
Used Honda Accord
592 Great Deals out of 92,752 listings starting at $1,495
Used Chevrolet Impala
379 Great Deals out of 27,771 listings starting at $1,499
Used Dodge Charger
253 Great Deals out of 33,687 listings starting at $2,000
Used Ford Mustang
317 Great Deals out of 38,894 listings starting at $1,995
Used Toyota Camry
890 Great Deals out of 73,115 listings starting at $1,400
Used Honda Civic
398 Great Deals out of 52,416 listings starting at $1,200
Used Nissan Altima
820 Great Deals out of 68,383 listings starting at $750
Used Pontiac G5
5 Great Deals out of 352 listings starting at $1,995
Used Chevrolet Cobalt
3 Great Deals out of 2,724 listings starting at $2,200

Used Cars For Sale

2009 Pontiac G6 GT Coupe For Sale
27 listings starting at $3,499
2008 Pontiac G6 GT Coupe For Sale
75 listings starting at $2,995
2007 Pontiac G6 GT Coupe For Sale
67 listings starting at $2,750

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.