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Thread: 6.0 or 5.3

  1. #1
    Jr. Mechanic drwdominance's Avatar
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    Default 6.0 or 5.3

    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.
    07 Sierra Classic, 5.3L, 4X4, Crew Cab
    Volant CAI
    Leveling Kit
    305/55/20 LTZ
    Flowmaster muffler
    Diablo Predator



  2. #2
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    murdog94's Avatar
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    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.
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  3. #3

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    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.
    08, Suburban, 6.0, 4:10's 4L80E, factory 20's Still stock.

  4. #4
    Jr. Mechanic drwdominance's Avatar
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    Quote Originally Posted by murdog94 View Post
    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.

    there seems to be a couple of stickers missing from under the hood. what is an rpo code?
    07 Sierra Classic, 5.3L, 4X4, Crew Cab
    Volant CAI
    Leveling Kit
    305/55/20 LTZ
    Flowmaster muffler
    Diablo Predator



  5. #5
    Jr. Mechanic drwdominance's Avatar
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    Quote Originally Posted by drwdominance View Post
    there seems to be a couple of stickers missing from under the hood. what is an rpo code?

    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.
    07 Sierra Classic, 5.3L, 4X4, Crew Cab
    Volant CAI
    Leveling Kit
    305/55/20 LTZ
    Flowmaster muffler
    Diablo Predator



  6. #6
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    murdog94's Avatar
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    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.
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  7. #7

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    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.

    Link,
    http://www.compnine.com/vid.php
    Last edited by 99'HEARTBEAT; 06-04-2010 at 10:53 AM. Reason: Added Infor.

    MIKE


    99"SILVERADO
    5.3 l 3.73 l G80
    BLACK BEAR CUSTOM TUNE
    SNUGTOP l COLORMATCH l KATZKIN










  8. #8

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    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?

  9. #9

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    Quote Originally Posted by 1flyfisher View Post
    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?

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

    MIKE


    99"SILVERADO
    5.3 l 3.73 l G80
    BLACK BEAR CUSTOM TUNE
    SNUGTOP l COLORMATCH l KATZKIN










  10. #10

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

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