RepairPal Certified shops can diagnose and repair your 2007 Cadillac Escalade. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Just had the same problem with my 2007 Escalade EXT. I was told that my ignition modules are bad. Having both replaced now and due to this replacement you must have new keys programed. It's running me around $800 through a personal mechanic.