PCM Diagnostics & Tuning - Can a dealership calibrate my speedometer???

I was just wondering if a dealership could program my pcm for 4.30 gear ratio that I had installed.....or is it just speed shops??? Dealership is 2 min. away & Rev Xtreme is 1hr away, and I don't have the $$$ for a hand held....any helpful suggestions are welcomed, thanx fellas :)

I severly doubt they can do 4.30's...I would assume they could do up to whatever came stock which in your case would be up to 3.42 gears. Otherwise yup a tunershop would be your best bet.

They don't and can't flash your PCM to anything other than what came in your exact car. They go by the VIN and the flash files came directly from GM. Only if they have an aftermarket tuner working at the dealer...and I highly doubt that.

You would be suprised how little people at dealerships know about cars. They are mainly a read the chart and replace it outfit. I remember one time I entrusted a dealership to fix my airbag system. They had the car for two weeks and couldn't fit it. I fixed localized the problem and fixed it myself in a couple of days. It only took that long because I ordered a part off E-bay.

Damn, thanx for the bad news:) Looks like I will be calling Rev Extreme cause my mileage is going up fast as shit

Hey. I am doing you a favor by leading you away from the Stealership.