I'm sure it's just a label for the repair crew to fix a chink in the wall.
Could be! Though, I think there is a chink in that theory.
Maybe someone in a famous car company has a weird sense of humour. A search on Bing throws up:
Silver P15-023 CHINK Chevrolet Red Chalk Program Shanghai General Motor/ Red Chalk Program McCann Erickson Guangming Ltd. China
Red Chalk Program?
The whole supported by Shanghai General Motors Chevrolet 2006 Chevrolet red chalk Rural Education Program (Chevrolet Red Chalk of the Program), is the spirit of poverty, the powers of the mind "for the concept of large public events, by calling city business from traveling to remote rural areas for short-term support education, so that the children get fresh enlightenment unprecedented. Both its novel theme to fit the crowd reflects the brand characteristics of the Chevrolet close to the public, to be called a perfect corporate welfare activities . . .
I am still not sure what the connection is - but that that is normal for me ... and TIC