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  1. #1

    Default New Guy with a LR4 or LY2 question.

    Like most who join forums, I have a question right off the bat.

    I just got a sweet deal on a used 2007 Chevy Silverado Classic W/T w/h a 4.8L Vortec (Low Mileage). This was the year that Chevy rolled over to the NEXT Generation (IV) 4.8 LY2 from the Gen III LR4. The LY2 is rated at 295 hp (220 kW) and 305 ftlbf (414 Nm) of torque. I hope this is the engine it has but I can't figure out the codes under the hood or cross them anywhere. The Label only says 4.8L. The truck has many upgrades including the complete towing package. It has the original window sticker. I found it in the glove box. The sticker has no mention of the Generation of 4.8L either.

    Here's my question: How do I find out which engine my '07 has? LR4 or LY2? Is it embedded in the VIN number?

    BTW, my family has always been members of the Bow Tie Club. We've owned Chevy's going back three generations. I'm Chevy to the bone. I hope they can pull out of this situation they are in now. My fingers are crossed.

    Glad I found this group. As a professional electronics repair dude since 1971 and a fair shade tree wrench, maybe I can chime in with words of wisdom from time to time. Here's one - "Don't use crimps on wire connections - Solder everything then insulate with Heat Shrink tubing."

  2. #2
    Master Mechanic CarpenterGuy's Avatar
    Join Date
    Jul 2008
    Location
    Leeds, Alabama
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    994

    Default

    Did you check the code sticker in the glove box? look for one of those numbers on that big ole list if you haven't already. other than that, i dont know. maybe someone else can help a little more.

    welcome to the club! i'm a die hard chevy guy myself.
    2006 Silverado Z71 - 97,000 - totaled, RIP
    2006 Silverado Z71 - 122,000 (K&N 77 Series CAI, PowerAid TBS, Magnaflow dual rear exit, 33x12.50 Mickey Thompson MTZ, Tuff Country Torsion Keys, Tuff Country Add-A-Leafs)
    1966 C10 swb stepside (Gen I 350, Turbo 400 trans, dual cyl power brakes, front discs)
    I'll keep my money, guns, and freedom. You keep the Change.

  3. #3

    Default

    Welcome to the site! Like "Carpenter Guy" said, check the list on the glove box door. Good luck!


    2010 Z/71 Colorado C/C
    Black 4X4 w/5.3L V8
    ===============
    2007 Winnebago Adventurer
    w/8.1L Chevy & Allison 6spd.
    Canyon Lake, Texas

  4. #4
    Moderator

    dwill3015's Avatar
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    Jan 2007
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    Default

    Welcome to the site!
    Darcy
    Washington State
    2006 Silverado 2500HD LT3 4X4 CC SB Duramax LBZ
    Tuff Country 6" lift, 35" Toyo M/T's on 20" Ultra Peacemaker wheels, Quadzilla Stealth2 programmer, Diamond Eye 5" cat-back exhaust, factory Special order color Yellow.

  5. #5
    Legend bry2500's Avatar
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    Oct 2008
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    Gloucester, MA
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    Welcome to the site!!
    BRYAN

    "IF YOU DON'T TREAT IT LIKE A TRUCK IT'S JUST A REALLY BIG CAR"

    02' Avalanche 2500 Onyx Black
    8.1L Vortec
    43,000 miles

  6. #6

    Default

    Welcome to the site!
    Scott

    ΜΟΛΩΝ ΛΑΒΕ

    '94 Chevy Suburban K1500
    3" exhaust w/ aero turbine non-baffled muffler
    CFM Technologies TB spacer
    CB w/ 44" whip antenna


  7. #7

    Default

    welcome to the site

    2003 Z71 Silverado LS
    Access roll up cover
    Bed Rails
    Billet Grill insert
    Bed Rug
    CB with PA system
    Waiting to be installed
    Two 8in RF HX2 punch( would have 12s but they got stolen)

  8. #8

    Default

    If it's the New body style GMT-900 truck, then it should have the gen4 LY2 4.8l engine. I'd suggest calling your dealer, typically the service department and just have them check for ya. If they're cool, they'll even print out a build sheet for you with all of the RPO codes listed. Quite handy.

    And welcome to the forum!

    2009 GMC Sierra Denali AWD

  9. #9
    Legend cascott325's Avatar
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    Aug 2008
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    Lawrenceburg, Kentucky
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    welcome to the site
    2000 silverado with a 5.3l v8, shorty headers, upgraded plugs, 10 mil wires, magnaflow high flow cats, flowmaster 80 series muffler(2 in 2 out) w/ 18 inch stainless silverline tips. i have a k&n CIA. its a 4x4 z71 offroad package. Ls model.
    extended cab 160k miles, truxedo low profile bed cover, diablo sport predator tuner.
    reman tranny @ 130k miles
    Chris

  10. #10

    Default

    Welcome to the forum!
    Matt
    Hallsville, TX

    2005 Silverado 1500 LS Crew Cab 5.3L 2WD
    K&N FIPK II
    Magnaflow Exhaust
    Hypertech Max Energy Programmer
    Suspension Leveling Kit
    Putco Element Window Visors
    Carriage Works Billet Grille
    TruXedo TruXport Tonneau Cover


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