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Old 08-21-2008, 06:58 PM   #1
Albatrossian
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Question RPO code question..

I was looking over the build sheet of my 81 GMC and found a couple of codes that I couldn't find an answer for. They are 30P and MX1. I did find one site that said 30P was a wheel color called Med. Adriatic blue and all the sites I looked at for MX1 was MERCHANDISED, TRANS, AUTO PROVISIONS. What in the world does that mean?
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Old 08-22-2008, 02:16 PM   #2
Captkaos
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Re: RPO code question..

MX1 = TH350
I don't know what 30P is, but it is supposed to be a wheel color.
30P = WHEEL COLOR MED ADRIATIC BLUE (94)
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1973 Chevy C-10
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1987 R10 twin turbo LS
1991 R3500 SRW CrewCab
1985 K5 diesel swapped project
1989 K5 2WD conversion w/ Vette susp Project
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Old 08-22-2008, 02:37 PM   #3
jblucolar63
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Re: RPO code question..

I got one for you all....GQ1 rear-axle standard. What is the gearing on it? It is a 1981 2wd Blazer it has a factory tow package if that helps. I know I can take the cover off and figure it out just thought since we are on this subject mabye someone might know.
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Old 08-22-2008, 02:40 PM   #4
Captkaos
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Re: RPO code question..

Generally it is going to be 2.73's for 81-87 and 3.08 for 73-80.
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1973 Chevy C-10
1978 GMC Jimmy (2WD) - SOLD
1987 R10 twin turbo LS
1991 R3500 SRW CrewCab
1985 K5 diesel swapped project
1989 K5 2WD conversion w/ Vette susp Project
Captkaos Customs
73-87chevytrucks.com
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