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6.0 or 5.3

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by drwdominance, Jun 4, 2010.

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  1. drwdominance

    drwdominance Rockstar

    i have an 07 sierra classic. how do i know if it is a 6 or a 5.3? my insurance says it's an HD.
  2. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    there is an emmissions sticker under the hood that has the motors displacement. Also if you pull the RPO codes in the glove box... And you should be able to do a vin decoding and that would tell you as well.
  3. ChelleCaz

    ChelleCaz New Member

    Another way to tell is to look at your tailpipe. If your pipe goes out the passenger side to the right then you have the 5.3 if it goes straight out the back on the passenger side then you have the 6.0.
    I beleive the 6.0 in those trucks was called the Vortec Max. Somewhere around 360 hp and 381 Tq. Relatively impressive power and crappy mileage compared to the 5.3.
  4. drwdominance

    drwdominance Rockstar

    there seems to be a couple of stickers missing from under the hood. what is an rpo code?
  5. drwdominance

    drwdominance Rockstar

    ok. figured it out. vin # has t in it which makes it a 5.3. if it had a u then it would be the 6.0.
  6. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    Sounds good.. and the PRO code is a 3 digit code. There is a list of them on a sheet that is stuck to your glove box liner.. The codes tell you basically everything that you truck came with.

    99'HEARTBEAT Epic Member Staff Member 5+ Years ROTM Winner 1000 Posts Platinum Contributor

    As Mentioned by Murdog94..[RPO Codes].....Are In your Glove Box....Enter your Trucks Vin # at the Site Below........It will show you what Engine you have...5.3 or 6.0.....Along with everything else your truck has on it...from the Factory.

    Last edited: Jun 4, 2010
  8. 1flyfisher

    1flyfisher Rockstar 4 Years 100 Posts

    I have a new 2010 GMC Savana. I don't see any RPO codes in my glove box. Where are the RPO codes for my vehicle? ARe they somewhere else?

    99'HEARTBEAT Epic Member Staff Member 5+ Years ROTM Winner 1000 Posts Platinum Contributor

    Hmm.....Being Van & a 2010....maybe G.M.did moved them to somewhere else on the Van's???.......:neutral:
  10. newsie23

    newsie23 New Member

    On my '03, the RPO numbers are on the rear surface of the front passenger door.

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