2007 LMM Speedo? HELP!!!

[GAMEOVER]

I used the speedo calculator to adjust for bigger tires than normal everything worked perfectly: speedo matches GPS:) but ABS and E-Brake MIL showed up on dash and I can't figure it out...Did I miss something?

[Nor-Cal Nick]

What size tires and what is the rev's you are changing it to?

[GAMEOVER]

325-60-20 size...

[GAMEOVER]

REV's ???

[Nor-Cal Nick]

OK so I take it then you set it for 35's
rev's for your tire would be 592 per Nitto A/T and that = 35.12".

In the table (H0136) put 596 and you should be good.

The GM trucks don't like to see anything larger than 35's but even 35's set the ABS will go off so I tend to set it just alittle smaller and 596 = 34.8"

Post what happens...:cheers:

[GAMEOVER]

I sure will....Thanks for your help!!!

[The Neens]

Did the ABS light come on after installing the larger tires, or after using EFI Live to correct the speedo?

[GAMEOVER]

After using EFI Live to correct the speedo... It had the "EDGE PRODUCTS" hooked up to it, I disconnected it, I corrected the speedo with EFI Live and after about 20ft or so the ABS & E-Brake lights came on...

[GAMEOVER]

I'm going to try what Nor-Cal Nick suggested though:)

[GAMEOVER]

The REV's after correction show -570/mile- Tire height 35.35"
Stock -679/mile- Tire height 29.79"

[c55asleep]

Good info

[flyguy_17]

I used the speedo calculator to adjust for bigger tires than normal everything worked perfectly: speedo matches GPS:) but ABS and E-Brake MIL showed up on dash and I can't figure it out...Did I miss something?

Hey I had this exact same problem on my 07.5 LMM! I am running 37s. I just figured I did something wrong in the calibration so I reflashed to the program I had before and haven't had time to mess with it since.