Ok, don't flame me about searching, did my research, still some unanswered questions. I'm having a slight hesitation, almost a lean stutter between 2-3.5k rpms in 2nd and 3rd gear under half to WOT. I've seen this covered on Stage 2 vehicles and it was corrected by reflashing, and I hope I'm not the only bone stock 06 Cobalt SS/SC on the forums having this problem. I have heard that there is a TSB out for it but I have been to 2 dealerships and been told that it's "supposed to feel like that" which is bullshit, I know it, you know it, my father has been a Dodge techie for 22 years and he knows it. If anyone has the number of that TSB be it a flash or whatever the fix may be, some help or advice would be appreciated. I've only got like 9k miles on my 06 and it's stuttering and acting stupid and really making me dislike my beautiful Cobalt.

 

Where are you at in Tampa?

 

I am having a similar issue with my 06 SS/SC. Also the revs like to bounce from 1k down to around 300 making it seem like it is going to stall

 

Mine does that when I clutch and come to a stop too, the whole bouncing around thing, but one issue at a time, the hesitation is what's bugging me right now lol. I'm in N. Tampa, up off North Dale Mabry Lutz/Land o Lakes area.

 

I think there is a reflash for stock motors too. I'd ask your dealer. But my dealer said they couldn't re create the hesitation

 

I've been to 2 dealers and they told me it's supposed to feel like that, saying it's because of the supercharger. News flash Autoway Chevrolet, it's not frickin turbo lag!

 

lol don't you just love the way dealerships say everything is normal....my supercharger sounds like a bunch of rocks in a tumbler and they said it was normal

 

My car was doing the exact same thing and its stock. They have a PCM reflash that takes care of that problem my car runs great now. Take it in and have it done.

 

do you just go in and demand a reflash?

 

I just called the Chevy dealership with the best service department in my area and he says there are NO open bulletins on my VIN. Then he mumbled some shtuff about GM not disclosing the bulletin or something or other. I swear if I go 0 for 3 on dealerships trying to get this fixed, I'm going to lemon and buy another one jeez. But he wants me to bring it in, trouble is no openings til next week, this is pathetic, I never had so many problems on my Jeep.

 

I don't know what dealerships problems are in dealing with problems...how would they like it if it was them

 

https://www.cobaltss.net/forums/show...highlight=Idle

 

could be the clutch slip issue i have the same problem.

 

Well I'll take that Doc. number and go to the dealer next week when they can "squeeze me in" and I'll keep you guys updated

 

I had a terrible time with my dealership last week they had my car for most the week. They wanted to accuse me of drifting and charge me for machining my rotors I called GM customer service and the guy there was an a** he said he has to go by what the dealership says. Turns out I didnt pay a penny because the dealership finally caved in on charging me 100$ for something I shouldn't be paying.

I've just about had enough though. The Cobalt is my 5th GM car I have bought and its probably going to be the last if I cant find a dealership that can treat people right. Funny thing is I have the factory warranty and then an additional bumper to bumper warranty on top of that until my lease is up.

But back to the topic...
The dealership isnt correct there is a PCM calibration that can be updated to stop that from happening. What is described is exactly what my car was doing.

 

Xtreme do you have the reflash part number, does it match the one in the thread linked above? I'm having the hardest time getting GM to acknowledge the problem. How did you describe the problem, is it related to the rough idle? They seem to have no problem acknowledging that.

 

Ah Ha! Just for the people who have this problem as well and are catching crap from the dealers like I am, I have the part numbers!

Part number: 12610926
New calibration to address idle surge condition also contains diagnostic enhancements for DTC P0171.

And another that also mildly concerned me.

Part number: 12605264
New calibration to address idle stability robustness under heavy A/C load.

These part numbers match my VIN which is a 2006 G85 SS/SC. I'll be taking it to my local dealer and demanding these 2 flashes later this week or next. Thanks for all who helped and encouraged me to research this beyond the dealer's "it's supposed to do that" b.s.

 

They didnt put part numbers on my service order. But I'm glad you got everything figured out! Because I know the problem was very annoying.

 

I am having similar problems as well on my '05. I plan on getting the Stage II in a month or so..will this fix my problem or should I have the dealership reflash before I have the work done?

 

I finally got mine fixed there was a whole new engine calibration module they loaded it contained like 3 or 4 different packs. I just went to
http://tis2web.service.gm.com/tis2web
punched in my VIN and you can look through the different modules see what they contain.

 

you may also have a leak in your intake, mine had that prob. and a friend pointed it out to me, all i did was tighten the clamp and everything was fine.