speedometer odometer calibration '92 s100 blazer

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posted
20 years ago

Thu, Apr 15, 2004 10:41 PM

I finally got the truck running right and put larger tires on it.

245/70R16 . My question is, now that I have these tires on it I know that the speedometer is off by a few miles an hour, not to mention the odometer, the anti lock brakes, shift points? etc. Should I be taking it in to a transmission shop for calibration, or is one of those $80.00 little gizmos that I see advertized a viable alternative? I'm going to be driving from New Jersey to Florida this summer and I have enough problems without having to pay speeding fines while out of my home state.

Thanks in Advance,

N.M.W.B.A.o.O.

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- Rita Ã Berkowitz
  
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posted
20 years ago

Thu, Apr 15, 2004 11:18 PM

You will need to modify your DRAC. Here is a link that will help.

formatting link

Rita

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posted
20 years ago

Fri, Apr 16, 2004 2:04 AM

i can't imagine your spedo is off that much. i put 285/75/16 on mine and the spedo was off MAYBE 1.5 MPH. vato zone has started running parking lot diagnostics and they may be able to remedy that issue but again, i don't think its anything to worry about. have someone pace you to see if making any adjustments is worth the investment.