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  1. #1

    Default RPO Codes: One oddball in my list

    This question may be posted somewhere around, but I didn't see it in my searches:
    A few days ago I was watching a video linked from here regarding the G80 RPO Code indicating the Eaton Locking Rear Differential. I got curious and started looking up all my RPO Codes for fun. I've got a 2007 Silverado 1500. All my RPO codes seemed right / fine with the exception of "1LT". I have no idea what this one is, and I've only seen it noted on Malibu codes as the LT-I trim package. I've checked the sticker, it's not a wrong note on my end that I can see. I still have the original window sticker, and it's an LT-II Package on there.

    Anyone have any ideas on the "1LT" RPO Code? If not, it's no big deal, I was just wanting a complete list for fun.

    I'm using these two sites for my lookups:
    http://www.gm-trucks.com/rpo-code-lookup/?find=1lt
    http://www.c2e.info/rpocodes/gmrpocodes0through4.html

    Thanks all!
    2007 Silverado 1500 NBS - Work truck and daily driver
    2002 Malibu - The wife's car, for now. I smell a Suburban in my future
    1976 Stingray - The only one in this list with less than 100,000 miles

  2. #2

    Default

    Technically, since your truck is the LT2 pacakge, you have to thave the LT1 before you get to the LT2 package. As in, the LT1 has everything the LT2 has plus whatever extra options make it an LT2. Hence, they put both codes on the sticker. I have nothing to base this on; I'm just thinking out loud.
    Clint (TX) 2001 Silverado LS 4.8L auto 2wd ECSB [GARAGE]
    Gasoline or gunpowder: If you ain't burning one, you ain't having fun!
    NRA Endowment Member 5 24 48 88 - Hendrick Motorsports FTW!

  3. #3

    Default

    The 1LT code makes sense to me, the LT-II does not. All RPO codes are only 3 char/dig long and do not have any -

    I suspect the LT-II is a marketing/salesman code and not a build code. You need to figure out what comes in the LT-! package and then what is added by the LT-II package. Then you can probably answer your question.
    Ray

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  4. #4

    Default

    Just go to http://www.compnine.com/vid.php and do the free 24 hour demo. You put your vin in and they list all the RPO codes and explanations. I did it and then copy and pasted them into a word document and saved it so I will always have it. It will list everything from alternator to tire size

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  5. #5

    Default

    The link Pikey provided is a nice one but be sure to copy/past like he said, the first time you use it. As far as I can tell, if you try to use it again, it wants you to pay for the info and won't show you anything until you do.
    Clint (TX) 2001 Silverado LS 4.8L auto 2wd ECSB [GARAGE]
    Gasoline or gunpowder: If you ain't burning one, you ain't having fun!
    NRA Endowment Member 5 24 48 88 - Hendrick Motorsports FTW!

  6. #6

    Default

    Quote Originally Posted by BornAgainBiker55 View Post
    This question may be posted somewhere around, but I didn't see it in my searches:
    A few days ago I was watching a video linked from here regarding the G80 RPO Code indicating the Eaton Locking Rear Differential. I got curious and started looking up all my RPO Codes for fun. I've got a 2007 Silverado 1500. All my RPO codes seemed right / fine with the exception of "1LT". I have no idea what this one is, and I've only seen it noted on Malibu codes as the LT-I trim package. I've checked the sticker, it's not a wrong note on my end that I can see. I still have the original window sticker, and it's an LT-II Package on there.

    Anyone have any ideas on the "1LT" RPO Code? If not, it's no big deal, I was just wanting a complete list for fun.

    I'm using these two sites for my lookups:
    http://www.gm-trucks.com/rpo-code-lookup/?find=1lt
    http://www.c2e.info/rpocodes/gmrpocodes0through4.html

    Thanks all!
    So was the RPO code 1LT in the glove box on the RPO codes sticker?

    2013 Silverado LTZ White Diamond Crew Cab


    Mods:
    Advent OGM1 Navigation
    Husky Liners GearBox Underseat Storage
    Airaid MIT
    EGR Rail Caps
    K&N Air Filter
    Flowsound 40 Muffler
    Hypertech Max Energy Tune (only top end limiter removed and AFM disabled)
    Chrome Tailgate Handle Cover
    TonnoPro HF-155 Tonneau Cover
    WeatherTech Front and Rear Splash Guards
    Husky Liners X-Act Contour Floor Liners
    WeatherTech Side Window Deflectors

  7. #7

    Default

    Yes, the 1LT RPO Code is directly from the glove box sticker
    2007 Silverado 1500 NBS - Work truck and daily driver
    2002 Malibu - The wife's car, for now. I smell a Suburban in my future
    1976 Stingray - The only one in this list with less than 100,000 miles

  8. #8

    Default

    Pikey, Just went to the link for decoding, and it is no longer free for the total decode. you enter you vin, they confirm they found it, and the actual build date, but don't show the codes without payment.
    Las Vegas, NV...2001 Silverado 1500 LT Z71 Stepside X-cab, 171,000 miles, 5.3, cat-back duals, leveling kit, 3.73, 17" rims, more to come...

  9. #9

    Default

    That stinks. I used it last month and got the free demo. It used to be completely free.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  10. #10

    Default

    Found this link on another site... Not sure if it explains what your inquiring!?

    http://www.silveradosierra.com/uncat...te-t14926.html

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