How do I "Decode" or ID my 12 bolt? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*Ozona* · 05-08-2006, 08:21 AM

Hi:

I have a 1972 GMC Sierra 1500. It has leaf springs and a 12 bolt, how do I "ID" the 12 bolt to figure out what gear is in it?

Thanks!

Livrat · 05-08-2006, 09:14 AM

On the passenger side axle tube close to the pumpkin near the top (somewhere between the shock mount and the cast center section) there is a stamped code.. you will need the last two to three letters, ( I use a knife to scrape the crud off)
When you find that look here for the info...
http://www.americanclassic.com/paint.htm

05-08-2006, 08:21 AM	#1
Ozona Account Suspended Join Date: Jan 2006 Location: Fort Worth Posts: 155	How do I "Decode" or ID my 12 bolt? Hi: I have a 1972 GMC Sierra 1500. It has leaf springs and a 12 bolt, how do I "ID" the 12 bolt to figure out what gear is in it? Thanks!

05-08-2006, 09:14 AM	#2
Livrat Member #1049 Join Date: Jun 2000 Location: Troy Montana Posts: 3,940	Re: How do I "Decode" or ID my 12 bolt? On the passenger side axle tube close to the pumpkin near the top (somewhere between the shock mount and the cast center section) there is a stamped code.. you will need the last two to three letters, ( I use a knife to scrape the crud off) When you find that look here for the info... http://www.americanclassic.com/paint.htm



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