GM B-Body Forum, 77-79 Caprice/Impala Forum

Join Now If Your A 1977- 1979 Caprice or Impala owner or other GM B-Body owner!!!
Like us on Facebook https://www.facebook.com/BBodyForum?ref=hl

Join the forum, it's quick and easy

GM B-Body Forum, 77-79 Caprice/Impala Forum

Join Now If Your A 1977- 1979 Caprice or Impala owner or other GM B-Body owner!!!
Like us on Facebook https://www.facebook.com/BBodyForum?ref=hl

GM B-Body Forum, 77-79 Caprice/Impala Forum

Would you like to react to this message? Create an account in a few clicks or log in to continue.
GM B-Body Forum, 77-79 Caprice/Impala Forum

A forum for the owners and enthusiasts of General Motors B-Bodies from 1977-1990, but dedicated to the owners of 1977-1979 Impalas and Caprices. Join up now!


4 posters

    RPO codes for a 9c1 car

    phil.fen86
    phil.fen86
    Active Member (Tier 2)
    Active Member (Tier 2)
    10th Year Anniversary
    10 years of being a member on our forum!


    Posts : 21
    Join date : 2014-01-10
    Age : 37
    Location : Fort Carson CO

    RPO codes for a 9c1 car Empty RPO codes for a 9c1 car

    Post  phil.fen86 Tue Feb 17, 2015 12:08 am

    I have a 1978 Impala 2 door but has a 8.5 rear end and the vin come to having a corvette 350 witch I believe is part of the 9c1 package but I was confused when I went to replace the rotor and the it measures 11inches but under auto zones system 11inch rotor measure 12inches and the rotor for my car was under the 9 inch rotor. Does anyone have the rpo codes for a 9c1 car.
    Sweet Seventy9
    Sweet Seventy9
    *Senior Moderator*
    *Senior Moderator*
    Helpful and Responsive Member!
    Very active with responding and helping other members with questions and concerns.
    10th Year Anniversary
    10 years of being a member on our forum!


    Posts : 973
    Join date : 2013-11-03
    Location : Upstate NY

    RPO codes for a 9c1 car Empty Re: RPO codes for a 9c1 car

    Post  Sweet Seventy9 Tue Feb 17, 2015 10:31 am

    RPO/SPID codes are the same for all Chevys.
    You're not deciphering the VIN correctly, NO B-body ever came with a "Corvette" engine.
    Rear disc brakes were not available on Impalas or Caprices even as an option in 1978. If you have rear disc brakes, either the rear has been replaced with a newer one, most likely out of a bubble 9c1, or they've been swapped over from a late 70s Buick Rivera or Caddy Seville.
    Most likely the rear was swapped.

    A bit of advice.... don't listen to anything the knuckleheads at Auto Zone say. You MUST go there knowing what you want and don't rely on them for anything if you want the correct parts. It's been my experience that they are absolutely clueless when it comes to older cars. LOL, newer cars too! They were probably looking up the front rotors, not the rear.

    There's threads on here with all the info you'll need. The search box is your friend. Smile
    phil.fen86
    phil.fen86
    Active Member (Tier 2)
    Active Member (Tier 2)
    10th Year Anniversary
    10 years of being a member on our forum!


    Posts : 21
    Join date : 2014-01-10
    Age : 37
    Location : Fort Carson CO

    RPO codes for a 9c1 car Empty Re: RPO codes for a 9c1 car

    Post  phil.fen86 Tue Feb 17, 2015 7:04 pm

    Ok after reading my post I apologize on my not being clear on what rotor I was talking about the car came with an 8.5 rear end a 350 don't know why I put corvette in front of it. The front rotors not the rear are 11inch. My question is did most 2 doors come with the 11 inch rotors on the front or the smaller size. But also did most 2 doors come with the 8.5 rear end? Thank for clearing me up. Phil Fenwick
    GM B-Body Forum
    GM B-Body Forum
    Admin
    Admin
    Helpful and Responsive Member!
    Very active with responding and helping other members with questions and concerns.
    10th Year Anniversary
    10 years of being a member on our forum!


    Posts : 755
    Join date : 2013-01-14
    Age : 31
    Location : Flint/Detroit, MI - Charlotte, NC

    RPO codes for a 9c1 car Empty Re: RPO codes for a 9c1 car

    Post  GM B-Body Forum Wed Feb 18, 2015 9:21 pm

    The 8.5 rear doesnt have anything to do with the 2 or 4 door, only special options, like f41 suspension or towing package, even having a 350 didnt mean you got an 8.5. But to be honest, they should have never came with anything other than an 8.5. All b bodies from 77-90 had 11" front rotors being only the 9c1s got the 12", and only the 91-96's got the 12" front rotors from the factory. IIRC you can bolt the later 12" rotors on the earlier b bodies with 11" rotors, because they use the same caliper, and the rotor actually measures 11.86"
    phil.fen86
    phil.fen86
    Active Member (Tier 2)
    Active Member (Tier 2)
    10th Year Anniversary
    10 years of being a member on our forum!


    Posts : 21
    Join date : 2014-01-10
    Age : 37
    Location : Fort Carson CO

    RPO codes for a 9c1 car Empty Re: RPO codes for a 9c1 car

    Post  phil.fen86 Thu Feb 19, 2015 12:55 pm

    Ok thank you that helps out a lot.
    avatar
    TMCKERROW
    Active Member (Tier 2)
    Active Member (Tier 2)
    5th Year Anniversary
    Celebrating 5 years of being our member!


    Posts : 28
    Join date : 2016-09-12
    Age : 41
    Location : Mattoon, IL

    RPO codes for a 9c1 car Empty rpo codes

    Post  TMCKERROW Tue Sep 13, 2016 5:38 pm

    Idk about anyone else, but Id love those RPO codes. Specifically, for a 96 9c1. I have almost came to the conclusion that NO one has them anymore, and its just a matter of hunting.
    Sweet Seventy9
    Sweet Seventy9
    *Senior Moderator*
    *Senior Moderator*
    Helpful and Responsive Member!
    Very active with responding and helping other members with questions and concerns.
    10th Year Anniversary
    10 years of being a member on our forum!


    Posts : 973
    Join date : 2013-11-03
    Location : Upstate NY

    RPO codes for a 9c1 car Empty Re: RPO codes for a 9c1 car

    Post  Sweet Seventy9 Tue Sep 13, 2016 11:56 pm

    avatar
    TMCKERROW
    Active Member (Tier 2)
    Active Member (Tier 2)
    5th Year Anniversary
    Celebrating 5 years of being our member!


    Posts : 28
    Join date : 2016-09-12
    Age : 41
    Location : Mattoon, IL

    RPO codes for a 9c1 car Empty Rpo

    Post  TMCKERROW Wed Sep 14, 2016 6:14 am

    Thank you! Now to do a control f search at work later and see what kinda 9c1 stuff i can come up with I guess. Btw, I have pics of my Beast, I guess I just cant post any links for a few more days since im a newb here.

    Sponsored content


    RPO codes for a 9c1 car Empty Re: RPO codes for a 9c1 car

    Post  Sponsored content


      Current date/time is Thu Mar 28, 2024 5:38 am