I did a search with your zip and the VIN and i can see it now. I saw the same thing a few days ago on a different car. Here's what I see:
Vehicle Details
- VIN: 1G1YL2D75E5300097
- MSRP Standard Vehicle Price $53,800.00
- Installed Options Total $20,965.00
- Laguna Blue Tintcoat $0.00
- Processing Option $12,960.00
- Z51 $8,005.00
- Brownstone, Leather seating surfaces with sueded microfiber inserts $0.00
- Destination Freight Charge $995.00
- Total MSRP $75,760.00
- Price* $75,760.00
From the above it looks like the $8000 for the Z51 might actually be the cost for the 3LT Brownstone. All the other options are probably bundled together in the "Processing Options". Chances are it's a fully loaded model for the options to add up to 13 grand. Or it could just be some dealer mark-up.
Maybe someone with more knowledge can comment on this.