89 K5 blazer
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New Member
Joined: Jan 2012
Posts: 3
From: durand,michigan
89 K5 blazer
hi, i was wondering what gear ratio my 89 K5 blazer has, i believe it to be a 373 ratio, i have all codes off the glovebox and it includes a GT4 number on it??, any help is appreciated
Starting Member
Joined: Dec 2010
Posts: 149
From: Wisconsin
Yes you are correct you that rpo code indicates you have a 3.73 rear gear ratio, if you ever wonder what other options your vehicle is equipped with, just search "GM RPO code lookup" and go through, 1 by 1 your rpo codes in the glovebox.
And btw, welcome to the forum.
And btw, welcome to the forum.
