RepairPal Certified shops can diagnose and repair your 2001 Cadillac DeVille. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
just lots of driving in the city and on they hwy, Id say about 50-60 clicks
and if you mean you want to clear codes disconnect the battery for 10 minutes.
Then go for a 50-60k drive.