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What axel does my truck have? It's a 95 K1500 and I want to buy a locker but I don't how many splines or the size. I'm new to the truck scene and am lost when it comes to this stuff.
 

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This page should have info...

http://homepage.mac.com/darketernal/axles.html
(credit goes to DarkEternal for the webpage)

Most likely you ahve a 10 bolt semi float 8.5" 30 spline. Some odd ball (not all) older Z71's had 14 bolt semi floats (9.5"). As far as ratios... (in glove box on sticker)

RPO codes
GT4 = 3.73
GT5 = 4.10
GU6 - 3.42
GH0 = 3.54
GU4 = 3.08
G80 = eaton locking diff (posi)
 
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