03 Sierra rcsb 4.8 5 speed 4wd and this is what i see what i go to change tire size in the wizard.
When i change that value to 30.5 for what size is on my truck, it is about 85 mph higher than what I'm really doing.
Help!
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03 Sierra rcsb 4.8 5 speed 4wd and this is what i see what i go to change tire size in the wizard.
When i change that value to 30.5 for what size is on my truck, it is about 85 mph higher than what I'm really doing.
Help!
I can't get the picture to upload.
But it says 12.58 for tire size and if i change that value it makes the speedo go crazy.
are you using the tire wizard or blue car software to change it ?Quote:
Originally Posted by NorthernEdge
Your best bet is to take how far you are off with the speedo/GPS and apply that to old tire size.Quote:
Originally Posted by NorthernEdge
(GPS reading / Speedo reading) x old tire size = new tire size.
The value in the box where the tire info is shows 12.58. If i put in 30.5 then the speedo is wayyyyyyy off like 70 mph off
Can you post the tune? At the bottom right of the dialog box is a button that says "Go advanced", When that loads use the "paperclip" icon to load a file.Quote:
Originally Posted by NorthernEdge
done buddyQuote:
Originally Posted by horsepowerguru427