Question about 2006 Pontiac G6

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I have a pontiac g6 2006, the 4 cylinder. When i shift the vehicle from park to drive, it makes a big almost a "clunking" sound. Then it does a smaller version of that into second gear. It is automatic transmission. After 2nd gear or so it stops. This also happens with a random "service engine soon" light appearing. I was wondering if anyone knew if this would be some sort of sensor or if the transmission may actually be slipping in those gears.

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  • dalene_nee Mar 25, 2009

    My transmission does the exact same thing. I had the transmission serviced and it did not fix the problem!

  • kevinme2 Mar 31, 2009

    I have the same problem with my G6. It first happened last year and the dealership followed a technical service bulletin, and it fixed it for a while. The problem came back about 3 weeks ago, and the dealership replaced the ECM and a body valve. Needless to say it is still not fixed, I have had a working car 3 days out of the last 3 weeks, and the dealership does not know what else to do. The dealership contacted GM to get their opinion, and I am waiting for their response.

  • elyssao Apr 15, 2009

    My 2006 G6 just hit 80,000 miles. my check engine light keeps coming on. There are also times i drive and it doesn't light up. The RPMs on my car randomly jump up to 5 RPM's when i am crusing down the interstate. I am getting it looked at this week. I am curious to see what is wrong with it NOW. The power steering went out at 40,000 miles. Power window quit working last summer and my heater quit working this winter.

  • titoalfaro Apr 20, 2009

    transmission jerking

  • Montrio1 Apr 21, 2009

    Just today my transmission started slipping and jerking in both 1st and 2nd gear. I called the dealership. My 06 was only covered for 3 years or 36,000 and I have 55,000 on mine. So, as they say, I am SOL.

    In the two years that I have had this car, it has been in an accident and had shoddy repair work done (through the dealership of purchase), I have had a wheel cover fall off while driving, my Keyless remote stopped working for no reason and even after repair, does not work accurately about 80% of the time.

    I have paneling on the inside of my car that came off as a result of repair. I can't get it back on. And now THIS!! I FRIGGIN' HATE THIS CAR and can't wait to get out of it. Problem is, just like everyone else, I am too upside down for a trade in right now. Any suggestions?

  • mz_muriatica
    mz_muriatica Feb 26, 2013

    It is the wonderful torque converter clutch solenoid. Mine went out last night. It will still go in reverse but now will not even go in to a driving gear. It all started out with all the same symtoms you are describing. So let them know the torque converter is getting stuck in the open position and you need it fixed asap.

  • elyssaotool Apr 29, 2013

    i have the exact same thing happening to my car. I have had two opinions and both advised I was needed a part inside my transmission replaced. They advised fixing it would stop the hard shifting and also remove the check engine light. Neither happened. Car is still shifting hard. FYI lots of other problems too. Power steering went out in 2008. Power window switches have stopped working twice. CD player stopped working all of a sudden. Tie rods had to be replaced at 30K miles and the AC/Heat only works when it wants to.

  • Josie Serna Sep 16, 2013

    I have had the same issue. Mine did it at around 75000 miles and I took it to the dealership and the fixed the problem, now 75,000 miles later at 150,000 it is doing it again. Not to mention all the other stuff that has gone wrong with it and cost way to much. And it wasn\'t like it was a cheap car. It was 15,995.00 before the interest. I bought this car for my daughter when she graduated and she does all the maintenance so that cant be the reason. I think Pontiac needs to buy all these cars back before someone gets killed. Not that they care.



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I have the exact car w/same exact problem. I was told that ist was the speed sensor, which just so happens to be located inside the transmission w/a $400. repair bill.

Posted on Oct 07, 2009

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  • kevinmn May 05, 2012

    Hi I also had the same problem. Its actually not a transmission problem. I\'m a mechanic and took me a while too figure out. The problem is the cam auctator( I probley spelled wrong) when bad it will actually raise transmission line pressure very high and that\'s the jerking sensation you feel. Also it will give a hard shift from gear to gear. There are 2 auctators an exaust and intake. Mine was the exhaust that was bad. They are under the plastic cover. On valve cover passenger side of engine. I fix this problem alot for people. The part cannot be found at autozone.advanced. or o rielys. Its a dealer item only. And do change your oil. Use the 5w-30 only . These work as cam faizers and are oil controlled. They go bad when oil isn\'t changed. And higher weight oil is used. I know its sounds unreal. Yet it is true. Hope this helped. And if a transmission shop charged u 400 dude they got over on u big time!

  • pngiles
    pngiles Aug 01, 2012

    Hi Kevinmn I also have same problem with my g6 , hope this works. Do you work in the Dallas area

  • Ashley Sep 22, 2012

    Hi Kevin. I was wondering if you could help me out. My friend has a Pontiac G6 GTPm automatic/5 speed slap shift. He was driving it last Saturday and stopped at a red light. When the light turned green the car wouldn't go. It goes in reverse and we figured out that it will drive in manual. What could be the problem? It sounds similar to your problem.

  • olga_lopez
    olga_lopez Mar 08, 2013

    Did changing the speed sensor fix the problem? I would greatly appreaciate your feedback. My Pontiac 06 has the same problem and I want to fix.


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I have the same car and problem..i was told it was a sensor...which has been changed twice and still does it...i need a solution too

Posted on Jul 19, 2011

  • Joe Joe
    Joe Joe Oct 19, 2013

    I also have a 2006 G6 GTP when put into drive doors will lock and unlock on their own and transmission will shift into another gear anyone know what it could be


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OKAY, I had the same problem. When driving you could feel the jerking sound and it's very annoying. I know and understand and I got mine fix about a 5 month ago. Here is the answer: Power Control Module: Once you take the pcm relay out it might come back to normal for 5 minutes then back to regular. The g6 is a computerized car. Buy A PCM and your problem will be fix. I promise it will be fix. It's not the pressure relay. I spent 1,500$ and all I had to do is buy a new Power Control Module because this computer controls the transmission: Here is the Link: ACDelco 12612384 GM Original Equipment Engine Control Module

Posted on Sep 02, 2015

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Any solution?

Posted on Oct 11, 2011

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Transmission mounts, I too had the same problem & that's how I fixed my 06 G6

Posted on Jul 20, 2012

  • olga_lopez
    olga_lopez Mar 08, 2013

    Did the transmission mounts stop your car from doing the clunking noise? Is it 5 trasnmision mounts?

  • Tertius Durham
    Tertius Durham Oct 26, 2014

    I need to know as well which mounts


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I have a 2006 Pontiac jerks when shifting out of gears and also when you put it in reverse!! Could my transmission be going out???

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Why a 2006-g6 Pontiac turns left when started up

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Yes there was. Here is the exact recall and claim number. Also is a phone number you can call for further assistance.

2008 Pontiac G6 Power Train Recall 12V460000 NHTSA: Action Number: N/A Service Bulletin Number: 12V460000
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  • Component:
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  • Potential Units Affected:
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Summary: General motors (gm) is recalling certain model year 2007-2010 saturn aura and model year 2008-2010 chevrolet malibu and pontiac g6 vehicles, equipped with a 4-speed automatic transmission. On these vehicles, the tabs on the transmission shift cable end may fracture and separate.

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Remedy: Gm will notify owners, and dealers will install a retainer over the cable end or replace the shift cable as necessary. This service will be performed free of charge. The recall is expected to begin on, or about, november 12, 2012. Owners may contact general motors at 1-800-521-7300.

Notes: General motors safety recall number 12106. Customers may contact the national highway traffic safety administration's vehicle safety hotline at 1-888-327-4236 (tty: 1-800-424-9153);

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If you are sure that the shifter is all the way in Park. then your key cylinder could be faulty and you are most likely locked out from starting the car by the Security System. With a faulty key cylinder, the Security System "thinks" that someone is trying to steal the car and locks out the starter and the fuel system.

Replacement of the key cylinder requires re-programming of the computer system so that the security system will recognize the new cylinder and allow the car to start.

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