gmc speed and abs lights

[norcaltruck]

Mike this is Nick from Nor Cal when I reset the parameters the speeedo was fast by 2mph and the abs light still came on I then changed the tire size to an over all tire size of 34" and the speedo was then slow by 8mph and the abs light has stayed off so far any help is good help if you can call me Nick G at 1 925 447 7800 thanks

[mikel]

Sorry I could not make it here last night guys.
It would seem at this point the best bet may be to JUST change the tire size to get the speedo right, rather that mess with both parameters. The gear and tire parameters are doing the same thing, so you should be able to make up the 2mph through only adjusting the tire size.

Thanks

[norcaltruck]

Mike can u call me at the shop 19254477800 i have so more questions please

[mikel]

I'll give you a call in the morning.

Thanks