What do these RPO/SPI codes mean?

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MrSony

Geezer
Nov 15, 2014
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Des Moines, Iowa
I've decoded all but 9 of the 3 digit codes from my Regal. I can't find them anywhere.

7XH
79D
791
79L
79Q
79T
799
8FU
9FU


Any help is appreciated.
 
Is your car exterior & interior burgundy? The 79_ could be the color codes. The other might just be assembly line part I.D.
 
79 is Dark Clarat Interior color.

7XH is the RH front spring
8FU is the LH rear spring
9FU is the RH rear spring
(XH and FU are the spring rate)

The should be a 6_ _ code for the LH front spring, too, like 6XJ

Those springs are mid to low on the std spring charts. FU's are one up the from the bottom (lowest load rate), so they are truly FU's as far as handling is concerned.
 
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79 is Dark Clarat Interior color.

7XH is the RH front spring
8FU is the LH rear spring
9FU is the RH rear spring
(XH and FU are the spring rate)

The should be a 6_ _ code for the LH front spring, too, like 6XJ

Those springs are mid to low on the std spring charts. FU's are one up the from the bottom (lowest load rate), so they are truly FU's as far as handling is concerned.
Yeah, it was 6XH. Left that one out. Whoops. Thanks man. I never would've figured this out.
 
Is your car exterior & interior burgundy? The 79_ could be the color codes. The other might just be assembly line part I.D.
Yes, it is. I wonder if one of them is for the color of the half top as well? If the 79_ are for burgundy colors, there are 6 things they could be. Hmmm maybe dash, body, headliner, seats, seatbelts, carpet? But which is which...
 

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And the 791, was actually 79I. My bad. So, in short:

79D- Trim Combi, Cloth, Ruby Red
79I- Interior, Ruby Red
79L- Secondary Color, Dark Red Metallic
79Q- Black Cherry Moulding
79T- Black Cherry Top
799- Ruby Red Seat Belts

Man, it's so cool knowing all this stuff about my car now. RPO codes rule.
 
FOUND THEM. http://apps.oldsgmail.com/rporesults.asp

This has a thing to look them up. Says interior is ruby red.

http://colors.findthedata.com/compare/25-743/Claret-vs-Ruby-Red

It looks way more claret to me. Or just straight Burgundy.

And the 791, was actually 79I. My bad. So, in short:

79D- Trim Combi, Cloth, Ruby Red
79I- Interior, Ruby Red
79L- Secondary Color, Dark Red Metallic
79Q- Black Cherry Moulding
79T- Black Cherry Top
799- Ruby Red Seat Belts

Man, it's so cool knowing all this stuff about my car now. RPO codes rule.

The 1982-1990 Buick Illustrated parts catalog says 79D is Dk Clarat Cloth on a G-body.

Anyone can make a table on the internet. It doesn't mean its right.
 
The 1982-1990 Buick Illustrated parts catalog says 79D is Dk Clarat Cloth on a G-body.

Anyone can make a table on the internet. It doesn't mean its right.
Then I guess It's claret then.
 
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