I can't find where ever it was that I saw the info posted on the gear ratios and their stock codes.

I have an '03 Silverado Ext. cab/ 5.3/4x4/ 10 bolt rear cover/ open differential- GT4 code in the glovebox

What gear ratio do I have?

Thanks!

 

Pretty sure gt4 is a 3.73 ratio

 

Thanks. I did a little more searching and on Chevy truck world the GT4 is listed as 3.73. You are correct.

I had programmed in "stock" for my gear selection, because that's what it is, but after scrolling through the choices found 3.73 to be an option. I have re-programmed for the proper ratio.
Thanks again!

 

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