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Old 09-07-2017, 08:50 PM   #1
GMC85HighSierra
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1987 GMC Truck RPO Codes

Hello, I recently picked up a 1987 GMC truck. It appears to be mostly original, but I'm not sure. I would like to find out what my RPO codes mean. I attached pics. Thanks

This truck has a 305 TBI in it with a 2wd 700r trans. It is a LWB. Has 87,000 original miles, came from Georgia. It appears to have the Sierra trim (although the hood ornament and chrome trim all around the lights suggests it's a Sierra Classic, also chrome bumpers). I got this truck for $1000.

Crazy story for how I got this truck. About a year and a half ago I was looking for a daily driver that was decent. I found this on craigslist and went to go at it. When my dad and I arrived, the truck was gone. The guy had an emergency with his kid, and he took the truck. A year and a half later, me and my dad were coming back from a parts haul for my 75 K5 Blazer. Google Maps took us down the same road where the truck was; we forgot all about the truck. We talked to the guy, and the truck was still available. He stopped driving it because the fuel pump went out; so it wouldn't start. We agreed on a price and got the truck.

Right now we are in the process of getting it running. We are replacing the fuel pump and gas tank (someone bondoed a hole, rusting the gas tank even more). It will turn over, but doesn't start.

I got this GMC because a year ago, I got a 1985 GMC that was pretty cool. It was a 350 4 on the floor, LWB. Ended up doing some swapping to get my K5 Blazer, and he traded the 85 for a 76 Chevy. Ever since I regretted getting rid of the truck; so I found a replacement to somewhat fill the void.

Would like to keep it mostly original; that's why I'm sking what the RPO codes are. Thanks
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Old 09-07-2017, 09:17 PM   #2
mongocanfly
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Re: 1987 GMC Truck RPO Codes

http://www.rpocodes.com/
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Old 09-08-2017, 07:12 AM   #3
Keith Seymore
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Re: 1987 GMC Truck RPO Codes

Generic info packet from the GM Heritage Center archive:

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

It specifically says "Chevrolet" but GMC would be the same.

Also - if you are interested you can send in $50 and your VIN and they can return to you the invoice for your exact truck, which would include the original selling dealership, RPO content and pricing. I've attached a sample below.

http://www.gmmediaarchive.com/?page=1

If there is a particular RPO you get stuck on - ask here. I have most of them memorized.

K
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Old 09-08-2017, 07:23 AM   #4
Keith Seymore
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Re: 1987 GMC Truck RPO Codes

Quote:
Originally Posted by GMC85HighSierra View Post
It appears to have the Sierra trim (although the hood ornament and chrome trim all around the lights suggests it's a Sierra Classic, also chrome bumpers). I got this truck for $1000.
It's a base Sierra (like a Custom Deluxe).

High Sierra/Scottsdale would show RPO Z62.

Sierra Classic/Silverado would show RPO YE9.

YG1 is what drove the bright trim around the lights, black body side molding (B84) and wheel opening moldings (B96). YG1 is included with the ZY5 two tone paint, as was the hood ornament. I don't think there were any (white) painted front bumpers left by '87, although V42 is the RPO for a rear chrome step bumper.

Looks like someone picked nickel and dime stuff to build the ad hoc truck they wanted.

K

http://www.lov2xlr8.no/brochures/gmc/87gmc.html

http://www.lov2xlr8.no/brochures/gmc/87g.html
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Last edited by Keith Seymore; 09-09-2017 at 06:57 PM.
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Old 09-08-2017, 07:47 AM   #5
Keith Seymore
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Re: 1987 GMC Truck RPO Codes

Quote:
Originally Posted by mongocanfly View Post
I don't mean to dominate the thread, but a couple comments about the generic online RPO decoders:

a) The RPO codes get reused, so if the decoder is looking for the modern usage of the code you can get messed up. For example, an LS6 today (GenIII small block) is not the same as an LS6 from 1970 (450HP big block).

b) Not all RPOs are included; in the decoder above YG1 is not shown.

So it's usually better if the person can find contemporary literature which includes the RPO codes from the era in question.

K
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Old 09-08-2017, 07:52 AM   #6
sambrutay
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Re: 1987 GMC Truck RPO Codes

good stuff Keith.
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Old 09-08-2017, 10:12 AM   #7
mongocanfly
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Re: 1987 GMC Truck RPO Codes

no worries Keith. ..when it comes to this stuff I'd listen to you before I'd listen to me...I didn't know that so that's good info...
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Old 09-09-2017, 06:56 PM   #8
Keith Seymore
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Re: 1987 GMC Truck RPO Codes

Quote:
Originally Posted by GMC85HighSierra View Post
It appears to have the Sierra trim (although the hood ornament and chrome trim all around the lights suggests it's a Sierra Classic.
Also, Sierra Classic/Silverado (RPO YE9) is not available with the base level single headlamp front end treatment.

YE9 drives the uplevel RPO V22 grille (quad headlamps).

K
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Old 09-13-2017, 07:39 AM   #9
Keith Seymore
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Re: 1987 GMC Truck RPO Codes

Quote:
Originally Posted by mongocanfly View Post
no worries Keith. ..when it comes to this stuff I'd listen to you before I'd listen to me...I didn't know that so that's good info...
I think we lost our original poster....

K
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Old 09-13-2017, 08:11 PM   #10
GMC85HighSierra
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Re: 1987 GMC Truck RPO Codes

Thanks for the help. Debating about putting a stepside bed on it; not sure. What are your guy's thoughts? Thanks
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