2000 Cadillac Deville Sensor light

Suspension problem
2000 Cadillac Deville V8 Front Wheel Drive 47,000 miles

I just had a Cadillac dealer repair broken motor mounts on Friday April 25. Car returned to me late in day. Driving home from the dealer at approximately ten miles away from them, the sensor warning light came on stating--service suspension system. I stopped at first available area to make a cell phone call and service manager would not agree they had done or not done "something" and I had to bring it back. They were ready to close and I have Monday appointment for body work to be done. I can turn off the warning, but comes back on when I start car. I read in some of your info that after a car repair has been done a technician may have neglected to plug in a sensor. Could this possible and can I drive the car until I can get back to dealer which is not close to home?

thank you for help--cyncere7221