GM Drivetrain & Suspension Chassis | Transmission| Driveshaft | Gears/Rear End/Differential | Traction Aids

02 gmc sierra rearend questoin?

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Old Mar 18, 2010 | 09:10 AM
  #11  
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mine also came with a g80 w/ 3.23.
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Old Mar 18, 2010 | 10:42 AM
  #12  
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My 2wd has the G80 and 3.73 gears with the tow package.
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Old Mar 18, 2010 | 11:41 AM
  #13  
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Same here 2wd with tow package 3.73 gears and a destroyed G80.
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Old Mar 18, 2010 | 08:55 PM
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My 5.3 extended cab shoetbed has 3.42 with a peg leg and I do have the tow package. some one changed the hitch from the round type to the square type. guess they wanted a heavy duty one.
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Old Apr 2, 2010 | 01:21 PM
  #15  
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Originally Posted by 5.3sierra
mine also came with a g80 w/ 3.23.
I just looked at my code to see what Diff I had.... GU5(3.23) and G80..... 3.23 sux, especially with my 32" tires on it......At least it has posi though....I would have loved to have 3.73s....
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Old Apr 2, 2010 | 04:42 PM
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Originally Posted by 1FastBrick
The only way to tell for sure what it was Originally equiped with is to look up the codes on the glove box. There called RPO codes. Look for these codes

G80= Positraction Limited Slip
GU5=3.23
GU6=3.42
GT4=3.73
GT5=4.10
These RPO's are always what I went by.

Originally Posted by axisT6
It varies really. I have geared a number of 2wd Chevy's with factory lockers.
What are u callin factory lockers, the G80? Or is there a better factory diff I don't know about?

Originally Posted by zebra86
just typically, unless you (or the dealer) specified you wanted the G80, a 2wd didn't have one, to the best of my knowledge
I know mine does.
I searched out my truck, for other options tho.
G80, trailer pkg, & 3.42 off dealer lot.
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