I have the part number for the lights. I bought them from the dealer this afternoon.

The small bulb behind the CCU part number is:
0072601-012230 @ $3.81 a piece

This is according to my reciept and the number the tech wrote down that he pulled off the computer.

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1980 300D European
"The Red Fox"
200,000 miles

2003 Chevrolet Silverado

609 Certification