I changed out gauge clusters and my tranny went out at 98,000 miles. My new cluster only reads 53,000 though so the dealer said the warranty won't cover it. Can they find the actual mileage stored in the PCM?

 

No. it's stored in the cluster. Did you not have someone flash the new cluster after installing it?

 

Correct, its stored in the cluster only. But at the same time, unless you put the sticker on the door with the old mileage, i would keep quiet about that. Its odometer fraud which is a felony. Sure nobody here is going to say much, just don't go telling all your buddies!

 

I had heard the dealership had the ability to pull the true mileage from the bcm.

 

I thought I had read that somewhere also...

 

That is false, dealer cannot pull actual mileage from BCM.... The state govts supposedly have software to read stuff from the SDM(air bag module)

 

To the best of my knowledge, mileage is stored in the cluster only...as well as the vehicle run hours, which should also be input into the cluster when a new one is installed and the mileage is input.

 

Why would you put a new cluster in without reflashing it to reflect your mileage is what I'd like to know? That's very illegal.

Pretty sure your SOL on the warranty. Only certain people can reflash it and the dealer is going to need documentation from them of a legitimate change of mileage.

 

I believe it's stored in either the BCM or the ECU along with the cluster . I personally own a GM Tech2 scanner and when I read the Millage it shows the Vehicals milage through either the BCM or the ECU. On my own personal truck It shows a difference of 75 miles between the cluster and what the scanner reads. I did buy it pre owned and factory certifed used. There is no record of it being tampered with. I don't have access to the GM records system but it is possible they modified it before it was originally sold.

 

It's not in the PCM or BCM or the dealer would have to flash these values in to them, when replacing them, and there is nothing in the replacement proceedure to to tell them how to do it. The only place it could possiblty be stored is the SIR module and even if its in there, I doubt it could be used to verify actual mileage