Pontiac G6 problems and issues


There are 49 reported problems


Problems with a G6? Share them

Latest problems (see without answers)

No start/no crank after new starter and new battery

Pontiac G6 2009 3.5 127124 miles
No start no crank. New battery, new starter, fuses and relay are okay, tried to command the starter relay and the scan tool said "Engine RPMs not detected"
Raymond from United States a month ago  
RA

Car wont turn on. No lights or sounds.

Pontiac G6 2006 Coupe 260000 miles
Car wont start, battery is good (tried 2 different batteries). No lights or sounds. Car can be jumped started by skipping the battery. Some suggested looking at the Fuel Relay Sensor, and i might have to reset it.
Chobbit237 from United States a month ago  
CH

Draining the cooling system

Pontiac G6 2009  208000 miles
We recently replaced the water pump and drained the cooling system. We used the drain plug at the bottom of the radiator. The problem is we only get about a gallon of coolant to drain. Capacity is a little over 9 quarts which would be almost 3 gallons. Any pearls of wisdom for getting more to drain. We have filled and flushed and drained and we get about the same amount each time. Is that the best we can hope for?
Shelbygirl37 from United States 2 months ago  
SH

El abanico de trabajar y no se escucha que prenda el compresor

Pontiac G6 2008 Pontiac g6 182252 miles
No enfria el aire ya le cambie el sensor de temperatura y aun asi no enfria
Eulalia from Mexico 2 months ago  
EU

The car run down the road fine all the sudden it will start to hesitat

Pontiac G6 2007 3.5 220000 miles
Whatever the hesitation pop the hood unplug the battery plug it back up and then it's fine what can be the problem?
Zomblance from United States 4 months ago  
ZO

Cant open trunk

Pontiac G6 2007 3.9 engine, convert able 153000153 miles
The button on the door is not opening the trunk. How can I make it open. Please help I need the trunk to open bad.
Foua from United States 5 months ago  
FO
1 report 

The powertrain is losing power

Pontiac G6 2026 3.5  255000 miles
Driving down the road it cuts off have to pop the hood take the battery cables off and put them back on.
Zombilance from United States 5 months ago  
ZO

Output speed sensor

Pontiac G6 2008 3.5l 200000 miles
Where is the transmission so I can find the output speed sensor
EsmeSlobbuhknobb from United States 5 months ago  
ES
1 report 

Headlights won't come on when I turn onswitch

Pontiac G6 2009 Sedan 11200 miles
When I turn my switch on to turn the high beams are low beams on , it won't work , they don't come on
Matilda from United States 7 months ago  
MA

No heat or air but blower is blowing

Pontiac G6 2007 Radio 250000 miles
No heat or air but the blow is blowing
Babbar from United States 8 months ago  
BA
14 reports 
slickwhiz from Austria 20 days ago
Troubleshooting an HVAC failure follows the same structured logic used by a top-tier <a href="https://slickwhiz.com/microsoft-powerb… BI consulting company</a> when diagnosing broken enterprise dashboards: if the front-end visual interface displays data but the underlying metrics never update, the failure point is rarely the display layer, it sits back in the ETL pipeline, data source gateway, or underlying compute capacity.
Isolating whether the failure stems from power delivery, control signals, or mechanical failure helps determine if a simple reset will suffice or if an HVAC technician is needed to repair the core heating/cooling components.
Comment

Radio plays when it wants to

Pontiac G6 2007 Radio 250000 miles
Radio light work like it on but no sound. And at random times the radio sound will play. But when I turn off the car the sound goes away
Babbar from United States 8 months ago  
BA
2 reports 
Laronald from United States 5 months ago
Check the fuse in the trunk on the right side above the amplifier
Maik from Mexico 12 days ago
Tengo el mismo problema no da sonido jala asta después de 10 minutos encendido y ya cheque los fusibles y nada
Laronald from United States 12 days ago
I don't understand Spanish sorry what is your problem that your having?
Comment

Drivers side window switch

Pontiac G6 2006 3.5 200000 miles
Drivers window go's down but not up
DotComDotGov from United States 9 months ago  
DO

Spark plugs

Pontiac G6 2010 S 180564 miles
I’m trying to find out in which way the spark plugs go into the coil.
Beto from United States 9 months ago  
BE

No start, "error" on odometer

Pontiac G6 2008 4 cylinder 130000 miles
08 g6 went from running fine every time, to not starting. All lights come on, but not a sound made when it should crank over. After dash lights cycle on then off, the odometer reads"error". Thru my research, I keep coming up with the bcm is the problem. However, haven't seen anybody say, it's bcm,I replaced it, it starts and runs now. Would an obd2 scanner read and verify the problem? Has anybody else dealt with, and successfully resolved this issue?
Jneighbors from United States 9 months ago  
JN
1 report 

Runs rough after started

Pontiac G6 2008 Pontiac g6 2.4l 170000 miles
Its hard to start and once it does it seems to idle fine for about 20 seconds and then runs rough and only gets worse after its warmed up, to the point it will stall out. Has lack of power and seems to lag a half a second behind when your revving the engine. Like you press the gas peddle and its slow to the response by half a second maybe. I put it on the diagnostic tool and it says crank shaft position actuator. Theres 2 of those on top of the motor, one for out and one for in. I replaced those 2 with ones from a 2nd car I had sitting around with exact same motor and year. I replaced the cam… Read complete
2008 G6 2.4l from United States 10 months ago  
20
1 report 
2008 G6 2.4l from United States 10 months ago
Anyone have any ideas?
Diesel49er from United States 5 months ago
Clogged PCV valve, possibly.
Laronald from United States 5 months ago
Either the throttle body is dirty or a clogged intake filter
Comment

My left break light only shows the reverse light looks to be the only

Pontiac G6 2008 4 door 2.4 180565 miles
One that comes on when the break pedal is mashed
Homdaman from United States 10 months ago  
HO
1 reply 
Laronald from United States 5 months ago
Fuse related check the trunk
Comment

Smoke from exhaust

Pontiac G6 2006 2.4 ltr 170000 miles
Have smoke coming from exhaust, car has never overheated or low on coolant,
Dave from United States 10 months ago  
DA
1 reply 
Laronald from United States 5 months ago
What color smoke black or white
Comment

Starting problems

Pontiac G6 2008  127000 miles
After running over an hour and turning off. Will not crank and start as if the security system is preventing any type of response. But will start after a cooling off period of 1 to 2 hours
Have replaced ecm module, have replaced ignition switch, have disabled security system. Replaced all relays
EDDIE from United States a year ago  
ED
2 reports 
Laronald from United States 5 months ago
Check wire where starter is located to make sure its not burnt or melted
Comment

Only reverse, no forward gears

Pontiac G6 2007 3.5 4 dr sedan  1350000 miles
Previous owner was my mother who rarley drove it, she had it 10 years and barley put 13000 miles on it. She maintained and maintenanced the car even when it didnt need it, previous owners same way I have all the records... I get the car and 30k miles later...car drove just great no warning signs of any problems besides a wheel bearing...
I drove to the store came out and when I shifted in to drive , it wouldnt move forward. Put it in every gear, only gear it moves in REVERSE. Any ideas?
Diddle-e-ack from United States a year ago  
DI
1 report 
Gator from United States 6 months ago
If you look behind the engine there’s a metal stick that moves when you’re switching gears. It might be getting locked up. It’s called a shift bushing. I had the issue about 2 years ago where I couldn’t throw the car into gear except for park and neutral and once I swapped out the bushings it was all good. You can do it yourself and it only cost me about $8
Laronald from United States 5 months ago
Shifter bushings check that
Diddle-e-ack from United States 5 months ago
It has not resolved the issue
Comment

Starts and all dash lights come on then dies within 7 seconds

Pontiac G6 2008 3.5l v6 base sedan  154210 miles
Changed the alternator and replaced battery and it'll start and stall for about a minute then all the dash lights come on and then it'll die
Skye from United States a year ago  
SK
2 reports 

Have power in my car but it won't start

Pontiac G6 2006 Pontiac G6 128000 miles
I have power inside the car the radio works the lights are on the dash but I have to use a jump box to start it had the battery tested and it's a good battery
Barbie Stocks from United States a year ago  
BA
1 report 
Laronald from United States 5 months ago
Check brake switch to make sure its not burnt or melted
Comment

Replaced serpentine belt now my ac blows hot air

Pontiac G6 2010 4door 241000 miles
Had a friend put new serpentine belt on and now my ac is blowinh hot air
gmatney from United States a year ago  
GM

Temperature gauge won't work

Pontiac G6 2007 Convertible  140000 miles
The temperature gauge of gt g6 07 won't rise unless I remove battery head and after driving like a kilometre it goes down again until I remove battery head again
Dokunsoat from Nigeria a year ago  
DO
1 report 

Trunk fuse box has a slightly melted gray wire

Pontiac G6 2007 2.4 180000 miles
Having fuel pump relay issues. But the seat belt sensor goes off continuously whether it is buckled or not. Plus the weight sensor is not working either. Last time I went to start the car I had to have someone else turn key while I just really lightly touched the wire going to fuse box that is light gray. The gray wire is slightly melted looks like it got too hot where it connects to the breaker box. I was wondering what exactly fuses control in that box besides the fuel pump relay.
Tammy Milsap from United States a year ago  
TA
3 reports 

Pontiac help needed

Pontiac G6 2008 Automatic, 4 cyl 220000 miles
Engine bay is covered with what looks to be oil but not sure. When I check the level it reads full? Can transmission fluid get slung all over just like the oil?
Poni from United States a year ago  
PO

Rr defrost inop

Pontiac G6 2008 sedan 185000 miles
Rear window defrost inop. Not getting power to
LUNKR70 from United States a year ago  
LU
2 reports 

The fans will not come back on to cool my car off

Pontiac G6 2008 Passenger v6 g6 1130026 miles
My car is overheating we have fixed everything on there but the cooling fans will not come back on???
Loulou from United States a year ago  
LO
1 report 
Laronald from United States 5 months ago
Fuse related check under the hood or make sure the connector is plugged in
Comment

It want start having problems starting

Pontiac G6 2005 4door v6 Pontiac G6 3.5 156000 miles
It won't start but it's getting fire through the dash the lights are coming on but it ain't getting no fire through the ignition going to the starter to let the starter engage what could it be but it has started twice on me but when I shut it off it wouldn't start no more
Shannon from United States 2 years ago  
SH
6 reports 
Laronald from United States 5 months ago
Its a bad fuel filter
Comment

Speedometer / Limp mode

Pontiac G6 2008 GT / 3.5L/ V6  208000 miles
The speedometer rarely works. It acts like it goes into limp mode when the speedometer read error instead of the mileage... I can simply pull out the TCM Battery fuse and /or the ETC Fuse and put the same exact fuse back in but turn it around or switch it out. With one of the other fuses of t he same amps and will will shift again most of the time. Sometimes it does not matter what I do it just will not shift out of first gear.
MissMe from United States 2 years ago  
MI
3 reports 

Locked radio

Pontiac G6 2005 V6 3.5 300000 miles
Bought the car with Locked radio
G6jqh from United States 2 years ago  
G6
1 report 
12

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