Problem with my 2007 Pontiac G6
3.5L V6
Low coolant level warning
Repair work done prior = Added antifreeze several times.
Repair this problem = Added coolant.
GM tech = KK
question = My 2007 Pontiac G6 with the 3.5L v6 engine is loosing anti-freeze. We have added several
times, but gets low after driving a few weeks. When it goes low, the heater wont blow warm air when sitting
at an idle. We have taken it to a shop 2 times. They pressure test, but cannot find a leak, although we smell
it from time to time. What can I do to repair this problem?
JK:
The first thing would be to have a cooling pressure system test done to see why you are low on coolant.
Low coolant will cause air pockets, and that is the most likely cause of no heat in the car, as long as the
engine temp. is up to normal.
Some common areas are of course water pump, hoses, coolant pipes.
There is a technical service bulletin on this car for no heat at idle. There is a procedure to remove air
pockets that could be done. I will send that to you in a moment.
The problem with this bulletin, is where did the coolant go to begin with. We have seen several of the 3.5l,
and 3.9 V6 engine have leaking head gaskets causing this condition. There are several places that are
common for them to leak. I will send a picture of these areas, so you can check it out yourself.
If you need more assistance, just let me know, JK
3.5L V6
Low coolant level warning
Repair work done prior = Added antifreeze several times.
Repair this problem = Added coolant.
GM tech = KK
question = My 2007 Pontiac G6 with the 3.5L v6 engine is loosing anti-freeze. We have added several
times, but gets low after driving a few weeks. When it goes low, the heater wont blow warm air when sitting
at an idle. We have taken it to a shop 2 times. They pressure test, but cannot find a leak, although we smell
it from time to time. What can I do to repair this problem?
JK:
The first thing would be to have a cooling pressure system test done to see why you are low on coolant.
Low coolant will cause air pockets, and that is the most likely cause of no heat in the car, as long as the
engine temp. is up to normal.
Some common areas are of course water pump, hoses, coolant pipes.
There is a technical service bulletin on this car for no heat at idle. There is a procedure to remove air
pockets that could be done. I will send that to you in a moment.
The problem with this bulletin, is where did the coolant go to begin with. We have seen several of the 3.5l,
and 3.9 V6 engine have leaking head gaskets causing this condition. There are several places that are
common for them to leak. I will send a picture of these areas, so you can check it out yourself.
If you need more assistance, just let me know, JK
Other Repair
Questions
Questions
2006 Pontiac G6. 4 cyl engine.
Repairs: new air filter, oil change, transmission flushed.
Question = My car goes very sluggishly up hills...it seems fine on nice flat
roads, but when going up hills, top speed is about 20 - 25 mph. It seems
to stay at 3000 rpms and won't shift down...It has almost 100,000 miles on
it. Is it just getting old?
Repairs: new air filter, oil change, transmission flushed.
Question = My car goes very sluggishly up hills...it seems fine on nice flat
roads, but when going up hills, top speed is about 20 - 25 mph. It seems
to stay at 3000 rpms and won't shift down...It has almost 100,000 miles on
it. Is it just getting old?
Answer: No, its not geting old. From what you describe, it sounds like you
may have a catalytic converter problem. Once they get a lot of miles on
them, or get clogged up from bad gas, engine problems, or lack of
maintenance, they will cause a driveability issue like what you are
experiencing. If it does need replaced, you should get the correct
converter for you car. Some muffler shops use cheap aftermarket
catalytic converters which will just cause more problems down the road.
Also, with 100,000 miles on the car, you should consider a major tune
up, including spark plugs, necessary filters, coolant flush, etc.
may have a catalytic converter problem. Once they get a lot of miles on
them, or get clogged up from bad gas, engine problems, or lack of
maintenance, they will cause a driveability issue like what you are
experiencing. If it does need replaced, you should get the correct
converter for you car. Some muffler shops use cheap aftermarket
catalytic converters which will just cause more problems down the road.
Also, with 100,000 miles on the car, you should consider a major tune
up, including spark plugs, necessary filters, coolant flush, etc.
2007 Pontiac G6. 2.4L.
Warning lights = check engine. Replaced cam shaft sensors(2).
Question = The light came back on after replacing the sensors. Tried to have it scanned again but the
scanner won't turn on,the guy told me i have a blown fuse. Two other guys tried,but,the same thing
happened,their scanners won't turn on either.Do i really have a blown fuse or is the problem something else?
Warning lights = check engine. Replaced cam shaft sensors(2).
Question = The light came back on after replacing the sensors. Tried to have it scanned again but the
scanner won't turn on,the guy told me i have a blown fuse. Two other guys tried,but,the same thing
happened,their scanners won't turn on either.Do i really have a blown fuse or is the problem something else?
Answer: If the scanners will not turn on, you have a power problem to the
diagnostic connector. Usually the fuse blows, so yes I would think that's your
problem. It is usually on the same circuit as the lighter or auxiliary outlet. Check
the fuse box to find out which. You have multiple fuse boxes on your vehicle, one
under the hood, one in the car and one in the trunk. Most likely the fuse you're
looking for is in the fuse box under the hood. Once the fuse is replaced you
should be able to power up the scanner and clear or check the codes again.
diagnostic connector. Usually the fuse blows, so yes I would think that's your
problem. It is usually on the same circuit as the lighter or auxiliary outlet. Check
the fuse box to find out which. You have multiple fuse boxes on your vehicle, one
under the hood, one in the car and one in the trunk. Most likely the fuse you're
looking for is in the fuse box under the hood. Once the fuse is replaced you
should be able to power up the scanner and clear or check the codes again.
