G80 Differential not listed on RPO

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Feb 5, 2008 | 11:43 PM

#11

Chevy Lover

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Joined: Jun 2006

Posts: 3,429

From: Vancouver. B.C. Canada

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RE: G80 Differential not listed on RPO

Are you saying that you don't have RPO codes listed on a label in the glove box? Are you just going by the window sticker and the sales sheet?

Feb 6, 2008 | 03:31 AM

#12

Calgary ZR2

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Joined: Jan 2008

Posts: 16

Calgary ZR2 is an unknown quantity at this point

RE: G80 Differential not listed on RPO

The RPO codes are listed in the glove box, however it does not indicate a G80. The window sticker on the other hand does have the G80 listed as a included option. I know from reading the other G80 posts on this forum and many others forums that it should be listed on the RPO.

Feb 6, 2008 | 11:43 AM

#13

Chevy Lover

BF Veteran

Joined: Jun 2006

Posts: 3,429

From: Vancouver. B.C. Canada

RE: G80 Differential not listed on RPO

So my question is what is on the glove box sticker? Any of these?

GT4

Axle Rear 3.73 Ratio (Dup with 5X1)

GT5

Axle Rear 4.10 Ratio (Dup with GT8)

GU4

Axle Rear 3.08 Ratio

GU6

Axle Rear 3.42 Ratio

G67

Level Control Auto, Air

G80

Axle Positraction Limited, Slip

Jan 16, 2009 | 01:08 PM

#14

ManiacMotorsports

Joined: Jan 2009

Posts: 2

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RE: G80 Differential not listed on RPO

Quote:

ORIGINAL: Calgary ZR2

The window sticker is from the GM dealer. I bought her brand new. Even the price breakdown has it listed as an extra.
In the snow and mud it feels good and has not problems going through and out of situations.
Is it possible since the RPO has "ZR2" in the list it is assumed to have a G80?

Zr2's came standard with with the G80 at a minimum, which is a limited slip rear differential. But a far more rare option, G20 is an upgrade over the G80 which is and automatic locking rear differential.

Jan 16, 2009 | 01:16 PM

#15

swartlkk

Administrator

Joined: May 2005

Posts: 41,334

From: Waterloo, NY

RE: G80 Differential not listed on RPO

Interesting. The only information I can find on the G20 (not even in any of the master RPO code lists I have) is from a wikipedia.com article on the ZR2...

Jan 16, 2009 | 02:37 PM

#16

95Blzr

Starting Member

Joined: Apr 2008

Posts: 223

From: Long Island, NY

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RE: G80 Differential not listed on RPO

Take off the rear diff cover? It' good to change the fluid anyway.

Jan 16, 2009 | 03:30 PM

#17

ManiacMotorsports

Joined: Jan 2009

Posts: 2

RE: G80 Differential not listed on RPO

Ok formal apology here, I guess I should have checked my facts better here. But I do know that there is indeed another RPO for an actual LOCKING rear end. It may have only been available in later model s10's as well. Because the Colorado has a true locker available in it. (not a GOV-LOC)