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04-03-2018, 06:14 PM | #1 |
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Location: Rochester, WA
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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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04-03-2018, 06:21 PM | #2 |
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Re: Help with some RPO codes please...
The dealership could help you with that....
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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) |
04-03-2018, 06:27 PM | #3 |
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Re: Help with some RPO codes please...
Even on a truck this old??
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No bolt or nut in the world will remain tight if you turn it to liquid!!! |
04-03-2018, 08:04 PM | #4 |
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Re: Help with some RPO codes please...
they are terrible when it comes to GM parts, but they should still have numbers they can look up?
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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) |
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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No bolt or nut in the world will remain tight if you turn it to liquid!!! |
04-03-2018, 08:39 PM | #6 |
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Re: Help with some RPO codes please...
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04-03-2018, 08:49 PM | #7 | |
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Re: Help with some RPO codes please...
Quote:
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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04-03-2018, 09:06 PM | #8 |
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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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1989 Silverado K2500ECLB- 307K miles with 90 K TBI 350-Not a show truck, a work tool that I can drive! 1998 Dakota EC 250K miles- I guess I'm just a truck guy now! |
04-03-2018, 09:59 PM | #9 | |
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Re: Help with some RPO codes please...
Quote:
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No bolt or nut in the world will remain tight if you turn it to liquid!!! |
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04-04-2018, 11:28 AM | #10 | |
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Re: Help with some RPO codes please...
Quote:
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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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!!! |
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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'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) |
04-04-2018, 03:55 PM | #13 | |
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Re: Help with some RPO codes please...
Quote:
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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1989 Silverado K2500ECLB- 307K miles with 90 K TBI 350-Not a show truck, a work tool that I can drive! 1998 Dakota EC 250K miles- I guess I'm just a truck guy now! |
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04-04-2018, 08:26 PM | #14 |
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Re: Help with some RPO codes please...
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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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
04-04-2018, 08:28 PM | #15 | |
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Re: Help with some RPO codes please...
Quote:
K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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04-04-2018, 10:03 PM | #16 |
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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) |
04-05-2018, 12:40 AM | #17 |
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Re: Help with some RPO codes please...
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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1989 K1500 Chev. EC Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit. 2009 Hummer H3T 3.7L 5M (sold) 1997 K2500 Chev. EC 7.4L/ 4L80E 2018 Dodge Ram 2500 HD R/C |
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