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RPO Codes: One oddball in my list

11663 Views 11 Replies 7 Participants Last post by  BornAgainBiker55
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:

Thanks all!
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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.
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