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Changing tire size to correct speedo not working!!!
Posted: Fri Dec 30, 2016 9:52 pm
by throttle out
I'm trying to correct the speedometer on my 99 silverado. When I select the tire size and confim it it doesn't keep it.
Any help would be appreciated
Thanks!
Re: Changing tire size to correct speedo not working!!!
Posted: Sat Dec 31, 2016 11:12 am
by 06MonteSS
after set the tire size, you are reinstalling the tune, right?
so then yes it will be changed..
when you go back in to the tire size setting on the tool, it will NOT show you what it is actually set to, it just shows a default value.. it's not what it is actually set to..
confirm your adjustment by comparing your speedo to a gps speed.. if it's within 1-3mph of each other, then you're fine and good to go.
Re: Changing tire size to correct speedo not working!!!
Posted: Sun Jan 01, 2017 12:33 pm
by throttle out
So it will just always default to 36"?
If I change it to 33 and hit the green check I can go back in immediately after and it's back to
36 again.
If I change to 33 and install the tune I see no difference in the response of my speedo vs
Gps on my phone. This just adds to the lack of confidence.
Re: Changing tire size to correct speedo not working!!!
Posted: Wed Jan 04, 2017 9:25 am
by mikel
so even if you make a large adjustment it doesnt affect the speedo?