I took my 2004 Avalanche into Woodland Hills Pontiac yesterday to have routine maintenance and asked that my speedometer be calibrated for my new larger wheels. I was told that it was unnecessary as the truck will automatically recalibrate, is that true or was I feed a line?
Automatically calibrate? How? Does it have GPS integrated with the ECM? I smell major BS.
If you got larger wheels and lower profile tires then the overall tire wheel diameter may not have changed, otherwise this sounds like baloney. I know that aftermarket programmers like Hypertech have the ability to account for changes in wheel/tire sizes and rear axle ratios. You could try checking the odometer using roadside mile markers.
Ed B.
As you were not asking for a free service why would the dealer turn down a oppourtunity to make some money?I know that thru the Tech 2 you have a range of tire sizes to select (range was not that great a most the original and 2 other very close options).Maybe GM made this a automatic feature as the years Iam refering to are late 90’s.
Why would you need larger wheels on an SUV? They’ll just get chewed up when you go off road.
[b] Why would you need larger wheels on an SUV? They'll just get chewed up when you go off road.
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How many SUV go off road other than when they miss the driveway after a night at the pub?
I know, I was being facetious. Obviously anyone who decides to get bigger wheels (18’s or better) on their SUV is an image-obsessed poseur. I’ve had people ask why I only have 15 inch wheels (but 33 inch tires) on my Bronco. Nobody understands that sidewall flex is a good thing when you’re not on pavement.