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Discussion Starter · #1 ·
Just a thought...

Does anyone know what gears are in my 99 'burb?

Specs:
C1500, Stock 350 CID, SLT


Is it 3.42's?
Is it posi-traction (I don't think so)

Would it be better to get posi and if so, 3.42 or 3.73?
 

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If you look at the RPO codes in the glovebox, one of them is for the rear end gear ratio.

I'm not 100% this list is good enough for truck RPOS, but here's a list. It looks like the RPO code you're looking for starts with a G

[media]http://www.marshu.com/images-website/car/gm-firebird-camaro-rpo-car-door-manufacturer-codes/gm-firebird-camaro-GM-RPO-car-codes.pdf[/media]
 
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