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RPO Code List--Sticky please? 2020-09-30

Sep 1, 2006
6,717
0
Tampa Bay Area
I started this thread to list common RPO codes from the Service Parts Identification Label that everyone always asks about, like axle ratios, engines, etc. I do not have all of them right now, just the ones that are in my Oldsmobile FSM from 1985. If you think I have left something out, post it here for the benefit of all. I am asking for this to be a sticky because it would be very helpful to everyone.

Engines:

LD5-Buick 3.8 ( 231) V6
LF9-Olds 5.7 diesel V8
LG4-Chevy 305 V8 with 150hp
L69-Chevy 305 HO V8 with 180hp ( 190 in Camaro)
LG8-Olds 307 HO engine in 442
LV2-Olds 307 standard V8

Rear Axle:

GH2-2.29 ratio
GM8-2.56 ratio
GT4-3.73 ratio
GU1-2.41 ratio
GU2-2.73 ratio
GU4-3.08 ratio
GU5-3.23 ratio
G72-2.14 ratio

G80-limited slip differential

G87-8.5in 10 bolt axle
G89-7.5in 10 bolt axle

Transmission:

MV9-3 speed auto ( THM-200)
MW9-4 speed auto overdrive (THM 200 4R)
MX0-Transmission Auto/Overdrive
MX1-Transmission Automatic

Suspension:

V2E-Standard Suspension Designator
FE2-Firm Ride And Handling Package when ordered with Y78 Calais/Salon
F41-Firm Ride and Handling Package

Miscellaneous:

NOS-Stripe Delete
N83-Chrome 15x7 Rally wheels
W42-Cutlass 442 package
Y78-Cutlass Calais ( Salon too?) option package
CF5-Astroroof ( sunroof)
C41-A/C delete
AR9-Sport Bucket seats
A51-Bucket Seats
BS1-Extra Sound Deadener
BX2-Lower Body Side Moldings
CO4-Landau top
UL5-Radio Delete
U21-Gage Package
VO3-Cooling System-Extra Capacity
V08-Cooling System-High Capacity ( Don't ask me the difference either!)
YT1-Deluxe Door Panel Trim
B18- Cutlass Brougham ( Not Sure, but it seems to follow from another description)
ZR6-Show Car
Z49-Mandatory Canadian Base Equipment model

There are plenty of things I left out. If you want to know any of them, post it and I will try to look it up. There are other things that are technically great, like the speedo gear codes, but there were just too many of them to list.
 
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85 Cutlass Brougham

Geezer
Thread starter
Sep 1, 2006
6,717
0
Tampa Bay Area
Ok, I found my more complete listing of RPO Codes from a GM book called: GM Production Options, Effective May, 1984. I will add some more info from that book here. It is about 20+ pages long, with over 100 entries per page, so if you need to know something it probably has it.

Engines:

LC3- Chevy 229 V6 ( 3.8 liter)
LC4-4.1 V6 ( Buick?)
LC5,LC6,LC8,LD5,LM9,LN3-231 V6 Buick
LG3,LE9,LF3,LG9-305 Chevy V8
LT8-4.1 V8
LV8-260 V8 ( Olds)
L26-200 V6
L27,L37-301 V8 (Pontiac)
L39-267 V8 (Chevy)

Aluminum Bumper Codes:

VD6-Aluminum Front Bumper Support
VD7-Aluminum Rear Bumper Support


There is a wealth of stuff here like the rear axle codes that are stamped on the housing. I will work on adding them at a later time.
 

Blake442

Geezer
Apr 24, 2007
6,835
113
Minneapolis
I was able to break down about 90% of my RPO sticker, but there are a few I wasn't able to find. Hopefully you can enlighten me as to what they are... They are as follows: BTW it's for my '85 442...

E7Z
GMD
TT5
VT5
V1P
Y64
Y78
6NY
7NY
79C
79I
799
8PZ
84Q
9PZ

Also, out of curiosity, are there codes for aluminum hoods and core supports?

Thanks!
 

Blake442

Geezer
Apr 24, 2007
6,835
113
Minneapolis
Thanks, I was able to get a few more off of that site, but still missing a couple...

I found this site and was able to get the first 90% of it...
http://www.c2e.info/rpocodes/
 

oldcardoc

n00b
Nov 21, 2009
2
1
Brevard NC
FYI over on the "montecarloss.com" site under General info on first page scroll down to vin decodeing open up and scroll down, there is a very comprehensive list that is on the "SPIL" (lots of codes) 1-0 & A-Z
 

snowball

Not-quite-so-new-guy
Jun 24, 2009
41
0
I have had a hard time with this one, see if you can help 1988 CSC code is FFL Thanks
 

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