VIN and RPO decode thread

[Boom Sounds]

I thought it might be useful to start up a VIN/RPO code decode thread

VIN:1GBJP37N0M3301377
1991 CHEVROLET VAN P30 ENGINE,7.4L(7.4N),V8(E.F.I.) 7.4N(L19)
V8-454ci 7.4L F/I Vin N #24665 L19
1991 P30 Chevy
454 Casting number 10114182
91-95 454 . 4-Bolt Gen-5
Chassis build date is Build Date: 1990-09-17 (sept 1990)
4 speed auto 4L80E
Rochester GM 220 TBI Throttle Body Injector 17091045
PCM 16147060
memcal ID is AWYP part number is 16158698

RPO code breakdown

VXT LABEL INCOMPLETE VEHICLE INCOMPLETE VEH LABEL(VXT)
V73 VEHICLE STATEMENT - US/CANADA US/CANADA VEHICLE STATEMENT(V73)
X88 CONVERSION CHEVROLET CHEVROLET(X88)
YC4 AXLE,FRONT(5000 LB) 5000 POUND F/AXL(YC4)
YF5 CALIFORNIA EMISSION CERTIFICATION CALIFORNIA EMIS CERTIFICATION(YF5)
ZV1 STATEMENT OF ORIGIN - MANUFACTURE
ZW9 BASE BODY OR CHASSIS BASE BODY/CHAS(ZW9)
Z5M SALES PROCESSING OPT - MOTOR HOME SCHEDULING
01L EXTERIOR COLOR,SECONDARY SPECIAL (01L)
01U EXTERIOR COLOR,PRIMARY,SPECIAL OVERRIDE (01U)
2WG Unknown
3WG TIRE REAR 7.50R-16D HWY TBLS BW, MICHELIN TIRE(3WG)
4WG Unknown
40P WHEEL COLOR,WHITE (40P)
CD4 WIPER SYSTEM,WINDSHIELD,PULSE PULSE WPR(CD4)
C7N GVW RATING(12300 LBS) 12300 GVWR(C7N)
DET PLANT CODE DETROIT, MI, BOC DETROIT PLANT CODE(DET)
ENV A/C PROVISIONS ENGINE DRESS, COMPRESSOR AND CONDENSER A/C PROVISIONS(ENV)
F66 SUSPENSION,HEAVY DUTY FRONT AIR HVY DUTY FRT A/SUSP(F66)
GQ1 AXLE,REAR,STANDARD RATIO(MERCHANDISING OPTION) STANDARD RATIO R/AXL(GQ1)
GT5 AXLE,REAR,4.10 RATIO 4.10R(GT5)
G50 SPRING,HEAVY DUTY REAR HVY DUTY RR SPR(G50)
JB8 BRAKE SYSTEM,HYDRAULIC POWER DISC,DRUM(GAS & DIESEL ENGINE)(ROTOR=12.5"X1.54",REAR BRAKE SHOE=13"X3.5") HYD PWR DISC/DRUM BRK(JB8)
K34 CRUISE CONTROL,AUTOMATIC,ELECTRONIC CRCONT(K34)
K68 GENERATOR,105 AMPERE 105 AMP(K68)
L19 ENGINE,7.4L(7.4N),V8(E.F.I.) 7.4N(L19)
MT1 TRANSMISSION,AUTO,4-SPD,THM-R2(4L80-E) 4-SPD A/TRANS(MT1)
MX0 TRANSMISSION,AUTOMATIC,OVERDRIVE(MERCHANDISING OPTION)(MD8) A/TRANS PROVISIONS(MX0)
NA9 EMISSION CONTROL,EVAPORATIVE EVAPORATIVE EMIS(NA9)
NB2 EMISSION SYSTEM,CALIFORNIA REQUIREMENTS CALIFORNIA EMIS(NB2)
R6J CONTROL - SALES ITEM NO. 10
R7Y CONTROL - SALES ITEM NO. 49
R8T CONTROL - SALES ITEM NO. 69
SLM SALES PROCESSING - STOCK ORDERS

[WayneG]

This chart is the Airstream VIN decoding, it is not 100% accurate for mine, but close enough

[Schreins]

I have a 1981 Excella. Where did you find the RPO label on your unit?

[Boom Sounds]

Originally Posted by Schreins

I have a 1981 Excella. Where did you find the RPO label on your unit?

You should be able to drive it off your VIN.

CompNine
Also, GM https://www.gmheritagecenter.com/gm-...tion-kits.html

[richard5933]

Originally Posted by Schreins

I have a 1981 Excella. Where did you find the RPO label on your unit?

The RPO codes being discussed here are the GM codes, not Airstream. At least that's how it appears to me.

With my 1999 Suburban the codes are on a sticker on the inside of the glove box.

Originally Posted by Boom Sounds

You should be able to drive it off your VIN.

CompNine
Also, GM https://www.gmheritagecenter.com/gm-...tion-kits.html

Not sure this is correct. There is lots of information that can be derived from the VIN but not all. The VIN won't show every option selected and installed during the build but the RPO codes will.

[martin300662]

Originally Posted by richard5933

The RPO codes being discussed here are the GM codes, not Airstream. At least that's how it appears to me.

With my 1999 Suburban the codes are on a sticker on the inside of the glove box.



Not sure this is correct. There is lots of information that can be derived from the VIN but not all. The VIN won't show every option selected and installed during the build but the RPO codes will.

Considering all the mechanical components on a classic are from the chassis supplier, and all the Argosy/Classics apart from the 370/360 are on GM chassis, and nothing to do with the 'aluminum box' that Airstream bolt onto the chassis, the RPO gives all the relevant data.

All the Airstream VIN does is confirm the length, the build year, and where the bathroom and beds are located.

In my experience for the aluminum bodied motorhomes, the GM VIN is also used for registration, insurance and even export.

[Schreins]

I agree RPO is for GM components. I just can't find the label on my rig. Where have others found the RPO label?

[dadstoy]

Originally Posted by Schreins

I agree RPO is for GM components. I just can't find the label on my rig. Where have others found the RPO label?

Don't have one on my '82 280

[richard5933]

Have you tried putting your chassis VIN into the GM decoder to see what it brings up? There are a lot of sites out there with information, like this one: https://www.vindecoderz.com/EN/Chevrolet

[Schreins]

Thanks for all of the advice. I tried the links in this thread with no luck. I quit when they want you to pay for a subscription. This last link was basically a CARFAX report. I'm looking for details about the GM components in my vehicle. EI: what brakes are in it, what transmission, what axle? As examples. That information is usually on the RPO Label. I'm about to start tearing the interior apart. Maybe I'll find the label, or not like "dadstoy". It's not a show stopper.

[martin300662]

I would have thought you have the JB9 (discs all round) brake setup, the 16.5 wheel units have the JB8 disc/drum combination.