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Camaro V6 LFX Engine, Exhaust, and Bolt-Ons For all LFX related parts

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Old 08-16-2013, 12:36 PM   #1
bluecam805
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LS rims upgrade to 20s problem

Has anyone upgraded there 18 steelies to 20s and had all the traction control lights come on??
I dont know how to get rid of em
I have larger tires in the back than the front

275 45 20
245 40 20

Thanks
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Old 08-16-2013, 01:41 PM   #2
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I have 22s on mines. The only thing I had to buy was those tire pressure sensors. Dont kno wat the traction thing about
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Old 08-16-2013, 01:43 PM   #3
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U proably need to reset your tmps, not sure why traction control light would come on, when I had my v6 I upgraded to the ss tires and all I did was the relearn function in the dic
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Old 08-16-2013, 01:49 PM   #4
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How do i reset the tmps? Is it the owners manuel? Im looking into that right now
The dealer said the computer thinks i have 18s and so i would need to re caliberate the wheels sensors. The tire shop said geting the tires the same size will fix it
Idk whos right
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Old 08-16-2013, 01:55 PM   #5
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In the dic when you get to the tmps for each tire hit relearn, You then will be prompted to let air out of each tire so the the tmps picks up the new tires, I think. It's been a while, lost my manual in hurricane sandy but I think that's the way to do it,
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Old 08-16-2013, 04:15 PM   #6
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I tried that thru the DIC and it would clear then the lights would come on again
But i switchd the front tires to have them all even and it looks so far good
Lights are off
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Old 08-16-2013, 05:21 PM   #7
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If the outside diameter of the tires is off, there will be lights.

And the TPMS relearn procedure for the newer cars has to be done with a scan tool, as the let-air-out-thing doesn't work on a '12+.

John B.
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Old 08-16-2013, 08:52 PM   #8
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If the outside diameter of the tires is off, there will be lights.

And the TPMS relearn procedure for the newer cars has to be done with a scan tool, as the let-air-out-thing doesn't work on a '12+.

John B.
Old procedure works on my 2012 1LT even though the books says to take it to a dealer. I have rotated once and rather then drive 40 to 50 miles to a dealer I tried it the way it is done on the older models. It works the same way. It took me a few tries until I found out I wasn't waiting long enough after letting air out of each tire. Start the learn procedure by hold in the set button when on the tire monitoring screen. The park light blinks to to tell you where to start, left front I believe. Let out 10 seconds of air and wait, I repeat wait, until the horn sounds and the next park light blinks. Repeat on the other corners until finished and a beep then a double beep (I think) sounds, refill all tires and you are done. I think I even started at close to 40 PSI in all tires. Or take it to a dealer and pay them to reset.

Dean.
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Old 08-16-2013, 10:48 PM   #9
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Its your tires, they are too different size wise. One is 29.7 inches, the other is 27.7 inches tall. I don't know how close they need to be exactly, but I want to say the tires need to be within 1/2" of each other in height. Maybe up to 3/4"?

The current tires I'm running are 27" tall, and I got a flat last week so I'm running the spare tire on the drivers rear, the spare tire is 26.5" tall... I am not having any problems with the stabilitrak or abs lights coming on etc. (.5" difference)

If I run the factory LS steel wheels/oem tires on the front which are 28.6" tall, and my current 27" tall on the rears (1.6" difference), I do get stabilitrack and abs lights.

Best go tire shopping if you want the lights to stay off and more importantly, be safe.
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Old 08-17-2013, 11:04 AM   #10
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Skibik, thanks for the heads up. I have Discount Tire do my rotations, since they rebalance them at the same time and all for free, so they use a scan tool and I get to read Road and Track while I wait.

RacnJsn, thanks for seconding what I thought I remembered from another thread about height differentials playing havoc with the systems.

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Old 08-19-2013, 08:19 AM   #11
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I agree with racnjsn, Tires are diff. dia. so front and rear are reading diff. speeds. Thats probably why the traction control light comes on. I assume the 45/40 is the front tire?? why did you pick 40's for the front?? I would have picked the same as the rear 45/45
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Old 08-19-2013, 12:14 PM   #12
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that is wierd, I had no issues going from my 18' t0 stock ss 20's when I had my v6. The tmps picked up the tires and the speedo was fine. I even had vince at trifecta check it and he said it did not need to be changed,. In any case at least it worked out for you
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Old 08-19-2013, 12:37 PM   #13
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I agree with what a few others have said. It's not the overall size of the tires that is the problem, it's that you have different diameter tires front to back. They are rotating at different speeds and the car is probably interpreting this as wheel slip. There may not be anything you can do other than get larger front tires to match the back.
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Old 08-19-2013, 12:46 PM   #14
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youre 4 tires need to be of the same Diameter if you want to get rid of the lights.
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Old 08-20-2013, 01:38 AM   #15
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You need to take it to a place that has a tpms relearn tool. The DIC procedure is only half of the process. I had it done at the dealership. It took less than 5 minutes and there was no charge at all.
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Old 08-20-2013, 02:20 AM   #16
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Why people keep posting how to re set the TPMS? When the OP is asking about the traction control lights.

TPMS and Traction Control are 2 very different things guys.
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Old 08-20-2013, 06:55 PM   #17
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Why people keep posting how to re set the TPMS? When the OP is asking about the traction control lights.

TPMS and Traction Control are 2 very different things guys.
They are different! Jeez nobody told me thanks!

The reference to the TPMS reset post was to correct a person on it. I sure as the hell wasn't going to post another thread about it.

This reply of yours really wasn't all that helpful to the OP either now was it.
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Old 08-20-2013, 07:08 PM   #18
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GM made the 18, 20 and 21 all match up so the overall height was the same if the wheels are stock.
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Old 08-20-2013, 07:48 PM   #19
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The reference to the TPMS reset post was to correct a person on it.
And that would be ME! Explanation summarily accepted.

John B.
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Old 08-21-2013, 06:56 PM   #20
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Old procedure works on my 2012 1LT even though the books says to take it to a dealer. I have rotated once and rather then drive 40 to 50 miles to a dealer I tried it the way it is done on the older models. It works the same way. It took me a few tries until I found out I wasn't waiting long enough after letting air out of each tire. Start the learn procedure by hold in the set button when on the tire monitoring screen. The park light blinks to to tell you where to start, left front I believe. Let out 10 seconds of air and wait, I repeat wait, until the horn sounds and the next park light blinks. Repeat on the other corners until finished and a beep then a double beep (I think) sounds, refill all tires and you are done. I think I even started at close to 40 PSI in all tires. Or take it to a dealer and pay them to reset.

Dean.
Thank you so much for this. I was told or read that GM had taken this feature away from us. Now I see that's it's still available, they just deleted it from the manual.
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Old 08-23-2013, 09:08 AM   #21
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Originally Posted by JohnnyBfromPeoria View Post
If the outside diameter of the tires is off, there will be lights.

And the TPMS relearn procedure for the newer cars has to be done with a scan tool, as the let-air-out-thing doesn't work on a '12+.

John B.
2013's needs the scan tool to relearn. Had to do mine a few weeks ago. I understand that from 2010 to 2012 you could do it without the scan tool.
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Old 08-23-2013, 08:20 PM   #22
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They are different! Jeez nobody told me thanks!

The reference to the TPMS reset post was to correct a person on it. I sure as the hell wasn't going to post another thread about it.

This reply of yours really wasn't all that helpful to the OP either now was it.
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Old 08-23-2013, 09:55 PM   #23
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I am running 275/45/20 rears and 245/35/20 fronts without any issues on my '13. I do believe it is for the front and rear diameter difference. You need larger front tires as I do too.
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