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I bought a new '09 Malibu 2LT, V6, 6 speed in January. This car is the nicest I have ever owned. My previous cars have been foreign base model commuters.
I am not to keen with the transmission. It has a hesitation at certain speeds and seems to go into 6th to early. As well as not dropping out of 6th soon enough(i.e. climbing a hill).
I read a post somewhere here, but I can't find it now, about re flashing the computer. Will re-flashing the computer fix the "to early" and "to late" problem?
I know this is set up for fuel economy but I don't like the feel of it. Can I get some advice from some of you, who may have already re-flashed the computer?
 

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My '08 LTZ V6 does the same thing. My wife hates it and the dealer states nothing wrong. I'm sure it is for fuel mileage.
 

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There's no such reflash available from GM. What you might've seen is one forum member doing custom tuning, but that's basically a modification as opposed to a GM procedure.

http://www.chevymalibuforum.com/forums/showthread.php?t=1863

The above link also has some discussion of the 6 speed shift logic. Basically, at highway speeds downshifts become different. A shapter throttle input is needed and then it drops down to 4th and takes off. However, note, that staying in 6th is not as bad as it seems with that motor, it actually does some pulling.
 

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I agree, Yury. My wife is kind of a lead foot and wants the car to downshift immediately. The 3.6l does have some torque.
 

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take a look at www.Pcmforless.com they have some great products, send them a message im sure they will do one for you
 

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I know GM strongly does not approve of modifying the programming so tread lightly and be careful who you let modify your tuning if you go that route. I don't care for the transmission tuning either and am seriously considering getting a tune for my car. I talked to an experienced local tuner shop who works on mostly high end modifed Corvettes and the like and can do the work but at $125 and hour and a 2 week backlog, I decided to do some more research. This led me to White Automotive who seems to be an experienced GM tuner that supplies an off the shelf tune for the Malibu 3.6L in addition to Pontiac G6 and Saturn Aura. I believe he was associated with Vector Motorsports previously. I contacted him by email and he seems very knowledgable about this car and it's quirks. In fact he owns and drives an 08 Malibu with the 3.6L and has been refining a tune for the last year or so. He indicated he's sold 150 reprogrammings for these particular cars alone. He's spent considerable effort retuning the transmission TCM with shift points that are now responisve to throttle position instead of the non intuitive logic the stock programming follows. They offer a tune that flashes both the ECM and TCM. Realize, the TCM is contained inside the transmission on these cars so you can't just send your module in to be re-programmed like some other vehicles can. The way White get's around this issue is they send you a PDA computer (deposit required) with the tune pre installed and then you connect it to the car with the supplied cable and let it do the flash. It will reflash both the ECM and TCM together. He seems to be most well known with the Pontiac folks and he posts on some of the Pontiac forums under the moniker name GTprix I believe. The phone number listed on the web page is not working at the moment although he indicated it would be up next week. He is still reachable by email. Here is the link.

http://www.whiteautoandmedia.com/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=52&category_id=17&option=com_virtuemart&Itemid=54

I have no first hand experience with their product and other than trading email, don't know how good it is. I recommend doing the research and coming to your own conclusion. Since GM will try to void your drivetrain warranty if they know your programming is modified, I probably won't report further on this if I do the install. Big brother is watching you know. ;)
 

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I agree, Yury. My wife is kind of a lead foot and wants the car to downshift immediately. The 3.6l does have some torque.
Well, for a lead foot the stock tuning is actually good. If you stab the pedal quickly it will go to 4th right away :)
 

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... It will reflash both the ECM and TCM together. He seems to be most well known with the Pontiac folks and he posts on some of the Pontiac forums under the moniker name GTprix I believe. The phone number listed on the web page is not working at the moment although he indicated it would be up next week. He is still reachable by email. Here is the link.
I though "GTprix" sounded familiar and I recalled that I have seen his posts on http://www.efilive.com/.

I wonder how much he charges for his tune. Another important question for me would be how to flash the original software back...Just in case, say fuel mileage is not good or something else is not to your liking....Is he going to send you AutoCAL (I presume that's the device he's using) again? That might get awkward, so it'd better be cheap :)
 

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I though "GTprix" sounded familiar and I recalled that I have seen his posts on http://www.efilive.com/.

I wonder how much he charges for his tune. Another important question for me would be how to flash the original software back...Just in case, say fuel mileage is not good or something else is not to your liking....Is he going to send you AutoCAL (I presume that's the device he's using) again? That might get awkward, so it'd better be cheap :)
His flash is $299 which is a pretty good deal I think. I have the same question as you though about getting back to stock and need to ask about that before I purchase. It would be a deal killer for me if I can't back out the custom tune for whatever reason.
 

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Discussion Starter · #11 ·
Thanks Yury for the link. That is exactly what I was looking for. Wish I could get that guy Bobo to tune mine. Thanks!

Hey BLUE-BU, if you do happen to go through with the install, since you won't report on it, you think you could send an email or something to me. I am going to research this more with GM before I do anything. I don't want to void my warranty.
Thanks for the help guys.
 
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