Question about speed/odometer recalibration?

[turk]

On my 99 Tahoe is there anyway to recalibrate the speedometer and odometer? I am now running 305/55R20's on 20x12's... so I am sure my gauges are not reading correctly.

I just checked my gas mileage today, and although I recognized that my speedometer would not be accurate due to my increased tire/wheel combination, I failed to make the connection that my odometer would be off as well... that is until I crunched some numbers

Any help would be appreciated - Ray

---------- Post added at 11:45 PM ---------- Previous post was at 11:41 PM ----------

I will readily admit that I feel pretty stupid for not recognizing that my odometer readings would be off a bit due to the increased circumference of the tire. :duh:

 

[WalterMitty]

I bought one of these:

http://www.amazon.com/Hypertech-320...rId=001&n=15684181&s=automotive&vehicleType=6

You can set a variety of parameters including tire size and gear ratios so everything is correct. It's pretty expensive and is set up to only work with one vehicle at a time.

I always thought that somebody in the business with a serious computer programmer would do the reprogramming for a reasonable fee, but I have never found one.

 

[SunlitComet]

A quick trip to a dealer can fix that in no time.

 

[98 2-DOOR]

I bought one of these:

http://www.amazon.com/Hypertech-320...rId=001&n=15684181&s=automotive&vehicleType=6

You can set a variety of parameters including tire size and gear ratios so everything is correct. It's pretty expensive and is set up to only work with one vehicle at a time.

I always thought that somebody in the business with a serious computer programmer would do the reprogramming for a reasonable fee, but I have never found one.

i bought the same thing...you can't go wrong with it and it increase your engine perfmance as well.