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Old 04-03-2018, 06:14 PM   #1
Big Daddy Bear
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Help with some RPO codes please...

I have managed to find all but the 5 circled. If anyone can help, I would appreciate it.

1992 Chevrolet 1500 W/T:
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Old 04-03-2018, 06:21 PM   #2
mountie
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Re: Help with some RPO codes please...

The dealership could help you with that....
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Old 04-03-2018, 06:27 PM   #3
Big Daddy Bear
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Re: Help with some RPO codes please...

Even on a truck this old??
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1992 Chevy W/T 1500 http://67-72chevytrucks.com/vboard/s...d.php?t=761241

1950 Chevy build http://67-72chevytrucks.com/vboard/s...d.php?t=661743
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Old 04-03-2018, 08:04 PM   #4
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Re: Help with some RPO codes please...

Quote:
Originally Posted by Big Daddy Bear View Post
Even on a truck this old??
they are terrible when it comes to GM parts, but they should still have numbers they can look up?
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'93 Cadillac STS Black
'93 Mercedes SL 500 Teal
'86 Yamaha FZ750 - 15,000 RPM
'86 Yamaha FJ1200 - Criminally Fast
2016 Ferrari 488 GTB, I drive it - don't own it.
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Old 04-03-2018, 08:11 PM   #5
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Re: Help with some RPO codes please...

Okay thanks, may give it a try.
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1992 Chevy W/T 1500 http://67-72chevytrucks.com/vboard/s...d.php?t=761241

1950 Chevy build http://67-72chevytrucks.com/vboard/s...d.php?t=661743
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Old 04-03-2018, 08:39 PM   #6
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Re: Help with some RPO codes please...

Google is your friend

http://d354nuoz4t18d4.cloudfront.net...?cb=1497380755
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Old 04-03-2018, 08:49 PM   #7
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Re: Help with some RPO codes please...

Quote:
Originally Posted by Kudzupatch View Post
I had used this one:

http://www.rpocodes.com/GM-RPO-codes...0through4.html

It seemed pretty complete, but those 5 were not included.

I like your option much better!!! Thanks!
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1992 Chevy W/T 1500 http://67-72chevytrucks.com/vboard/s...d.php?t=761241

1950 Chevy build http://67-72chevytrucks.com/vboard/s...d.php?t=661743
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Old 04-03-2018, 09:06 PM   #8
Pampas56
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Re: Help with some RPO codes please...

After a quick google search I found this:

YET is 225/75/15 rear tires
ZET is 225/75/15 spare tire
1SA is Option package 01 what that entails is anybody's guess.

6WK and 7WK are Computer selected Suspension LH and RH respectively. I would guess that the factory groups the suspension parts by size or rate and tries to match the components (kinda like piston weights for high performance engines).

Keith Seymour should have the definitive answer over on the square body forum.
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Old 04-03-2018, 09:59 PM   #9
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Re: Help with some RPO codes please...

Quote:
Originally Posted by Pampas56 View Post
After a quick google search I found this:

YET is 225/75/15 rear tires
ZET is 225/75/15 spare tire
1SA is Option package 01 what that entails is anybody's guess.

6WK and 7WK are Computer selected Suspension LH and RH respectively. I would guess that the factory groups the suspension parts by size or rate and tries to match the components (kinda like piston weights for high performance engines).

Keith Seymour should have the definitive answer over on the square body forum.
Thank you, curiosity satisfied!!!
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No bolt or nut in the world will remain tight if you turn it to liquid!!!

1992 Chevy W/T 1500 http://67-72chevytrucks.com/vboard/s...d.php?t=761241

1950 Chevy build http://67-72chevytrucks.com/vboard/s...d.php?t=661743
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Old 04-04-2018, 11:28 AM   #10
Keith Seymore
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Re: Help with some RPO codes please...

Quote:
Originally Posted by Pampas56 View Post
After a quick google search I found this:

YET is 225/75/15 rear tires
ZET is 225/75/15 spare tire
1SA is Option package 01 what that entails is anybody's guess.

6WK and 7WK are Computer selected Suspension LH and RH respectively. I would guess that the factory groups the suspension parts by size or rate and tries to match the components (kinda like piston weights for high performance engines).

Keith Seymour should have the definitive answer over on the square body forum.
This is correct.

That means XET is 225/75 15 front tires. They are divided up that way in case somebody wanted to get street tires on the front, snow tires on the rear and a different spare.

Generic Info packet from the GM Heritage Center archive is attached. 1SA is the "quick spec" in the dealer order guide. The info packet doesn't call it out the same way but since it is a Work Truck you have a pretty good idea of the content anyway.

https://www.gmheritagecenter.com/doc...olet-Truck.pdf

K
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Old 04-04-2018, 11:36 AM   #11
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Re: Help with some RPO codes please...

Thanks!
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No bolt or nut in the world will remain tight if you turn it to liquid!!!

1992 Chevy W/T 1500 http://67-72chevytrucks.com/vboard/s...d.php?t=761241

1950 Chevy build http://67-72chevytrucks.com/vboard/s...d.php?t=661743
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Old 04-04-2018, 11:54 AM   #12
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Re: Help with some RPO codes please...

I wonder if Chevrolet & my GMC share the same codes? They only show a Silverado.
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'93 Cadillac STS Black
'93 Mercedes SL 500 Teal
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Old 04-04-2018, 03:55 PM   #13
Pampas56
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Re: Help with some RPO codes please...

Quote:
Originally Posted by Keith Seymore View Post
This is correct.

That means XET is 225/75 15 front tires. They are divided up that way in case somebody wanted to get street tires on the front, snow tires on the rear and a different spare.

Generic Info packet from the GM Heritage Center archive is attached. 1SA is the "quick spec" in the dealer order guide. The info packet doesn't call it out the same way but since it is a Work Truck you have a pretty good idea of the content anyway.

https://www.gmheritagecenter.com/doc...olet-Truck.pdf

K
Thanks for tapping in Keith.

I noticed that there were a large number of suspension RPOs, all LH or RH. Is my supposition correct or even close to the case?

Or is it just covering Berettas on up to K3500 springs?
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Old 04-04-2018, 08:26 PM   #14
Keith Seymore
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Re: Help with some RPO codes please...

Quote:
Originally Posted by mountie View Post
I wonder if Chevrolet & my GMC share the same codes?
Yes. A GMC was a Chevy with RPO Z88.

They went down the same assembly line. Sometimes they were a Chevy on one side and a GMC on the other.

K
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Old 04-04-2018, 08:28 PM   #15
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Re: Help with some RPO codes please...

Quote:
Originally Posted by Pampas56 View Post
Thanks for tapping in Keith.

I noticed that there were a large number of suspension RPOs, all LH or RH. Is my supposition correct or even close to the case?

Or is it just covering Berettas on up to K3500 springs?
No - you were exactly correct. The buyer chooses a model (and/or GVW) and the computer picks the right springs based on the engineering release tables.

K
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Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926
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Old 04-04-2018, 10:03 PM   #16
mountie
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Re: Help with some RPO codes please...

Interesting..... about springs..... My factory leaf springs ( C2500 / 7200 )

..... The left spring was built differently from the right side leaf.

The dealer could not explain it.
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'70 GTO Midnight Blue
'88 GMC Sierra SLE 392,000 miles-(2018) sold to Classic car shop in Germany.
'93 Cadillac STS Black
'93 Mercedes SL 500 Teal
'86 Yamaha FZ750 - 15,000 RPM
'86 Yamaha FJ1200 - Criminally Fast
2016 Ferrari 488 GTB, I drive it - don't own it.
'05 GMC Yukon XL , SLT 4wd ( just purchased 2018)
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Old 04-05-2018, 12:40 AM   #17
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Re: Help with some RPO codes please...

Quote:
Originally Posted by mountie View Post
Interesting..... about springs..... My factory leaf springs ( C2500 / 7200 )

..... The left spring was built differently from the right side leaf.

The dealer could not explain it.
I think it has to do with axle torque. Sometimes the vehicle would "shudder" on takeoff when the springs are equal. Another reason why the shocks were staggered too.
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