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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Stowburb on February 20, 2010, 08:47:35 am

Title: build codes and gear ratio's available on '89-91 2wd suburbans
Post by: Stowburb on February 20, 2010, 08:47:35 am

hey guys,
 does anyone have the build code #for the different rear end gear ratios that were installed in 2wd 1/2 ton suburbans from around 88-91?
 I have 2 burbs and i need to know what gear ratio's i have so i can decide what rear im gonna use.

 Thanks Guys,

Chris "stowburb" stowe

Title: Re: build codes and gear ratio's available on '89-91 2wd suburbans
Post by: zieg85 on February 20, 2010, 09:24:34 am

it should be listed on the sticker in the glove box

Title: Re: build codes and gear ratio's available on '89-91 2wd suburbans
Post by: Stowburb on February 20, 2010, 09:42:17 am

yes, i know but i dont have the code #'s.....like "gu6" etc..... was hoping someone hde those codes and the corrisponding gear ratio's so i could determine what rearends and ratio's i have

Title: Re: build codes and gear ratio's available on '89-91 2wd suburbans
Post by: Lt.Del on February 20, 2010, 09:47:47 am

http://www.angelfire.com/ny2/96transam/rpocodes.html


http://www.c2e.info/rpocodes/

google is great for RPO GM codes

gu6 = 3.42

Title: Re: build codes and gear ratio's available on '89-91 2wd suburbans
Post by: Stowburb on February 20, 2010, 10:01:36 am

cool.....didnt think of google....Thanks