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having the same problem with my 07 v6 sedan. started about1 1/2 months ago. think it has more to do with the tranny.i already had it rebuilt about a year ago because 3rd gear was gone and it was doing same thing before that.
 

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The acceleration issue was due to a misfire on cylinder 5. Replaced the plugs and wires at a very high cost $500 bucks. My first estimate was $700. WTF costs so much.
 

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Tell me about it, I priced them. If you get the parts from Pontiac they are higher and the shop doubles it. Plus they charged me $89 just to hook it up to their machine. Believe me I had three different shops look at. $500 was the lowest price I found. I would have done it myself but I could not fit my hand to get plugs 1,3 and 5. Or 5,3 and 1 from left to right.
I cannot believe I had paid $500 bucks for a job I used to be able to do myself for $50 bucks.

My ex-wife had a god damn Fiero once and to change the plugs you had to release the motor mounts and roll the engine. Great car, Pain in the ass to fix.
 

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PCM Malfunctioning

Hey guys, I've been reading up on your posts because I am having the same problem with hestitation going uphill between 35-70 mph. Everyone thinks I'm losing my mind and that i don't feel what i feel in the gas pedal. Obviously, after reading your posts, that clearly isn't the case.

My dealer just told me today that i'm basically crazy even after a Tech drove my car with me in it. I could feel the hesitation from the passenger seat but he claims he felt nothing which i find to be a blatent lie. I own a 2009 G6 GT and I tried disengaging the T/C but no dice, still hesitates. From what I've read, this PCM seems like an easy fix and covered on my powertrain warranty. Definately going to look into it.
 

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07 Black GT Vert ♥
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Hey guys, I've read a lot of discussions here from people with similar problems to what I'm experiencing. Unfortunately, most of them end with people giving suggestions, and never a follow-up or resolution post, so I feel like I'm beating a dead horse on this.
I've got an 07 3.5 V6 G6 with 46k and extended warranty. I've had the rough idle for years, dealer says it's normal. Lately I've noticed something new. Sometimes when driving a consistent speed or with the cruise on, when accelerating slowly or climbing a hill, the car feels like it's hesitating. It's very subtle, but it's there. It almost feels like I got hit by a solid gust of wind for 5 to 10 seconds. I would say it's short of lurching, but if it gets worse, it would be. This only happens when I'm trying to lightly accelerate, if I am trying to pass somebody smoothly or need to punch it, no problems. But if I'm driving 65-72 with the cruise on and have to climb a slight hill, I'll feel it. It's nothing terrible, but it's just enough to make you think twice about it. The wife thought I was crazy, but she noticed it too when driving on the highway tonight.
Has anybody had a similar experience and found a reasonable solution? I know there are lots of possibilities, but I need to go into the dealer with some ammo and knowledge. I just had the car serviced at the dealer 2 weeks ago, the issue existed before that, they said they couldn't find anything, but I'm not sure how hard they tried. I'd love to go in there with a solid idea and not have them take forever trying to solve the problem.
By the way, I'm hoping to drive this car from Chicago to Montana 4 days from now, hence the concern. The car is fully drivable, but I don't want this issue to turn into a problem 1500 miles from home and ruin our vacation. As you can tell from the time stamp, I'm losing a bit of sleep over it. :eek: Thanks guys
Add a bottle of Techron to a full tank and run it out before adding your next tank.

http://www.chevron.com/products/prodserv/additives/tcp.aspx

 

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G6 Transmission Hesitation

Purchased a new G6, 2008 in 2009. It has 23k miles and I too am experiencing the problem in which you refer with transmission hesitation. Took it to a GM dealer who checked to be sure spark plugs and wires weren't failing. Nothing there, so mechanic took it for a ride and found the same problem I was experiencing. My G6 hesitates at from 30 to 45 mph, but I also experience same sensation at higher speeds either excelerating or de-excelerating. Dealer told me they couldn't find anything, so I went a step further and wrote a letter to GM. Did get a response from GM district manager and was instructed to take it back to the GM dealer for further analysis. They kept my G6 for 5 days, supposedly checking for various problems, which included driving tests, meter readings, and torque converter readings. When I picked it up on the 5th day, same old, same old. Couldn't find anything. All the torque converter readings were normal, but the G6 still experienced the same hesitations at various speeds. I was told that my car wasn't broken and that my 100,000 mile guarantee would still be in effect in event further problems occurred. Something they say I would have to live with. By the time we finished with all this I still feel frustrated over this problem....GM dealer, district manager, and service manager was just "blowing smoke." I believe they know something is wrong, but they won't admit it. No recall notices have been issued.....kind of funny since so many G6 owers are experiencing the same problem. I have owned 6 new Pontiacs and have never experienced this problem. Would appreciate hearing if you feel the same, or there are others who feel the same.

Hey guys, I've read a lot of discussions here from people with similar problems to what I'm experiencing. Unfortunately, most of them end with people giving suggestions, and never a follow-up or resolution post, so I feel like I'm beating a dead horse on this.
I've got an 07 3.5 V6 G6 with 46k and extended warranty. I've had the rough idle for years, dealer says it's normal. Lately I've noticed something new. Sometimes when driving a consistent speed or with the cruise on, when accelerating slowly or climbing a hill, the car feels like it's hesitating. It's very subtle, but it's there. It almost feels like I got hit by a solid gust of wind for 5 to 10 seconds. I would say it's short of lurching, but if it gets worse, it would be. This only happens when I'm trying to lightly accelerate, if I am trying to pass somebody smoothly or need to punch it, no problems. But if I'm driving 65-72 with the cruise on and have to climb a slight hill, I'll feel it. It's nothing terrible, but it's just enough to make you think twice about it. The wife thought I was crazy, but she noticed it too when driving on the highway tonight.
Has anybody had a similar experience and found a reasonable solution? I know there are lots of possibilities, but I need to go into the dealer with some ammo and knowledge. I just had the car serviced at the dealer 2 weeks ago, the issue existed before that, they said they couldn't find anything, but I'm not sure how hard they tried. I'd love to go in there with a solid idea and not have them take forever trying to solve the problem.
By the way, I'm hoping to drive this car from Chicago to Montana 4 days from now, hence the concern. The car is fully drivable, but I don't want this issue to turn into a problem 1500 miles from home and ruin our vacation. As you can tell from the time stamp, I'm losing a bit of sleep over it. :eek: Thanks guys
 

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Door Lock Actuator

My 08 G6 right rear door lock wouldn't work, so dealer checked and found it needed a new "Door Lock Actuator." Once installed, the lock works perfectly. My car has 23k on it, so was covered under warranty. Not sure what the cost of replacement was as I didn't see any billing.

I just rode about 60 miles and found the following. The hesitation almost stops when I have a) turned the traction control off and b) use the manual shift function. That tells me it is something electronic for sure. I was really pissed at first but it sounds like this is something that shouldn't be too expensive. I too have the extended warranty. Because while we try to be good Americans we're not stupid. This car has a number of issues before 50k miles. The rear passenger door lock won't work electronically. The cruise works sometimes, sometimes it doesn't. The rear tire looses air. At least I think it does. Can't complain about that though, that's normal wear and tear. This hesitation thing is making me nuts. I am learning a lot on this site. Like it a lot. Will update when I have something new to report. :mad:
 

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Yes i have an 08 with roughly the same miles and it did not idle rough. It does hesitate on slight acceleration. If I put my foot down real hard it doesn't hesitate. Slight hesitation when I accelerate a little.
I own a 2008 GT G6 3.5 with 56,000 miles and mine is doing the same thing as your car does I have no Idea what to do.Did you find out anything???
 

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to be honest with you all i am wanting to sell the thing. I have seen a million cars like it and GM still sucks for quality. I shoudl have went Jap like I wanted to.
 

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07 Black GT Vert ♥
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I believe the G6 is drive-by-wire with buffered gas pedal input, for smoother takeoffs.
Maybe that's malfunctioning and causing the hesitation?
 

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I own a 2008 GT G6 3.5 with 56,000 miles and mine is doing the same thing as your car does I have no Idea what to do.Did you find out anything???
:( Unfortunately, after the dealer had my 08 for five days for analysis, they claim they found nothing. All of this was coordinated by GM Field Specialists after a letter to GM. Either they know something is wrong and don't want to do anything about it, or they just don't care and put us through the usual boilerplate to get them off the hook. Am giving thought to write to the new GM CEO to let him know they need to do something about the quality of their automobiles. (Someone said to just ignore it....I don't think so. You spend $$$ for an expensive vehicle and no one wants to back them)
 

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I believe the G6 is drive-by-wire with buffered gas pedal input, for smoother takeoffs.
Maybe that's malfunctioning and causing the hesitation?
:cool: If that is the case, then why didn't the GM specialists and my Pontiac dealer find this problem and correct it. They said the same, "just ignore the problem and when it occurs press down the accelerator until it quits." Is that the million $$$ design and engineering that we should have to put up with? I believe they changed transmission design and do not want to admit it was a flop. Unfortunately Pontiac is history, so I think they just don't care and hope we go away. Automobiles are expensive and manufacturers need to be more responsible for the errors!
 

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Dropped my car off this morning for the same hesitation issue. Within the last week it has needed to downshift just to get up a couple hills (cruise control on, on expressway) on my way to work...it's never done this before. To my surprise the dealer said they noticed the hesitation too, I was not expecting that! They said that there is a TSB for an issue with the torque converter. They needed to order some parts and will get it all buttoned up tomorrow. I'll post back to let everyone know the outcome.
 

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Thank God!!

08' g6 4 cyl 29k Thank god I'm not the only g6 owner with his hesitation problem! Mine does it exactly at 39 mph while bearly touching the gas. I've had it to the dealer 3 times now. The 1st time they found nothing...second time they said it was the torque converter locking and to just tap the brakes and it would unlock. They did an update for the reflash tcm for trans update on down shift...which didn't help the problem. Frustrated I went home...and thought wtf....I bought a brand new car and I need to tap the brakes while driving?!? :eek: So this monday, I dropped it off and told everyone I'm not picking it up until it is fixed. 3 days later I get a call saying they drove it around town and found nothing..no codes, etc. I drove to the dealership and took the service manager around the block and he felt every damn bit of it. The rpms flexed and you could feel what it was doing. Mind the last time they said it was normal. This guy said this is NOT normal and they will fix it....we will see and I will update all you guys on what the "fix" is.

I've also had problems of the check engine light/check gas cap light coming on after filling up. I've had the gas cap replaced 3 times now...they say the seal around the cap leaks...so every couple of months I go and get another gas cap from them. lol! Also have had the rear passenger lock actuator replaced, and intermediate steering shaft.
 

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ok, I just picked up the car from the dealer. It definately feels better and I don't think the hesitation is there anymore but I'll be able to do more testing tomorrow. Here's what the dealer found:

"Observed data and found torque converter clutch duty cycle is flaring up from 64% to 80% and 10 rpm slip. Searched for bulletins and found 080730018. Replaced torque converter o-ring as stated in bulletin. Test drove and observed tcc duty cycle is now 42% and steady."

This was all covered under the powertrain warranty. I'll report back tomorrow after I get to drive it along my normal route. It feels a bit more responsive off the line now...could be my imagination but I was able to actually spin the tires off the line which it never has done before...I've only owned it for 6 months.
 

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2007 Pontiac G6 GT coupe 3.5L V6
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Im at 78825 miles I'm scared to have my transmission fluid changed. I heard nothing but negative stuff on it
 

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Im at 78825 miles I'm scared to have my transmission fluid changed. I heard nothing but negative stuff on it
I think my car was about that mileage when I changed mine. Changed it again at about 120k. If it keeps running I will do it again later in the year as I am around 160k. No issues with the change. I also dropped the pan, cleaned it and changed the filter the second time. Getting it filled to the right level was a bit of a pain as I had to level the car on jack stands. No lift or fancy tools here. Hope it goes well if you decide to get it done. Personally I see more benefit than downside. That said I don't think I would have chosen any form of power flush. I stuck with a drain and refill.
 
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