2003-2007 Silverado Write Precise Milage

[smeeprom]

I can share you a script for this dash if you need it

I have a script that works fairly well, but maybe yours is better. I would try it if you don't mind posting it.

Sorry, I duplicate posted this by accident...

[clusters]

And I have a Digiprog that calculates them to within a few Km by just clipping on the eeprom

Never had to calculate them manually.

[smeeprom]

Maybe no-one else in the world cares about the minor odometer reading, but I will post what I found just in case!

The odometer reading should read 0 mi. with "00 00 00 FF FF FF FF FF FF FF FF FF" and every 256 digits (25.6 miles) the major odometer reading changes and the minor odometer reading rolls one space to the right.

To calculate in which position the minor reading should be, divide the odometer reading (including tenths) by 256. The last digit (before the decimal) in that number should be the position of the minor odometer reading with position-0 being immediately after the major reading and position-9 being at the far end (XX XX P0 P1 P2 P3 P4 P5 P6 P7 P8 P9)

Example: For 125,589 miles, 1255890/256=4,905.8203125 means that the minor odometer has moved a total of 4,905 spaces to the right, since there are 10 spaces we can ignore the 4,900 times since at that point it would be back at position-0. The five at the end of 4905 means the the minor odometer reading is expected to be in position-5 (XX XX FF FF FF FF FF XX FF FF FF FF)

If I knew how to write .CALC files I would edit my IPROG calculator to do it for me. (if I ever get it done I will post the file)

Of course, if you are manually editing the hex code you need to enter your new calculation in all three positions.

[smeeprom]

I modified the "Silverado 25020" Iprog calculator to enter the minor odometer reading in the right location. Just unzip and paste this file in the same folder as the original silverado calculator file in either ETsmart or Iprog. I renamed it "Silverado (precise) 25020" so you don't have to overwrite your tried and true calculator file. Please don't laugh too hard at my newbie script if you bother to read it, and if you find any bugs either fix it for me and post the patched file, or let me know and I might look into it again.