Help W/ RPO Codes

[MacA]

I found the RPO Code section here on GM-Trucks.com and I also found another site that helped as well, but I have a couple of codes that I cannot ID. These were taken off of the "Service Parts Identification" label in the glovebox.

 

1SZ, 6MT, 7MT, EVA, VXS, YD3, and YD6

 

There were also some RPOs that I identified, but wanted a little more clarification:

 

1SB - Option Package 02 - Is there a specific list of items for this package?

 

OSG - Oshawa Assembly - Is this good or bad or doesn't matter?

 

X88 - Chevrolet Conversion - What does this mean?

 

YE9 - Uplevel Decor - What is this?

[MacA]

OK, never mind the other items. Can someone at least explain these two for me?

 

X88 - Chevrolet Conversion - What does this mean?

 

YE9 - Uplevel Decor - What is this?

 

Thanks!

Mark