Author Topic: RPO Codes  (Read 3126 times)

Offline 77 Scottsdale

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RPO Codes
« on: May 04, 2018, 11:25:33 am »
Hello Chevy truck people, on my RPO sheet there are 3 codes that I cant find anywhere and I don't understand what they mean. the codes are ZLB, XLB, and YLB. they all say"L78-15/B TBLS HWY BL" Thanks for your help!


Offline 77 Scottsdale

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  • Posts: 68
Re: RPO Codes
« Reply #2 on: May 04, 2018, 03:17:32 pm »
Huh, its for the tire size. Thank you for that. it says the tires are supposed to be 285/75R16 that looks like a pretty big tire. No wonder my speedometer is like 6 mph off :P

Offline Big Chip

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Re: RPO Codes
« Reply #3 on: May 04, 2018, 04:52:15 pm »
Huh, its for the tire size. Thank you for that. it says the tires are supposed to be 285/75R16 that looks like a pretty big tire. No wonder my speedometer is like 6 mph off :P
Where does it say that?  It’s a K10, right?


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