Two problems related to catalytic convertor have been reported for the 1999 Oldsmobile Alero. The most recently reported issues are listed below.
The Oldsmobile Alero is a pile of crap. Since I have had it I have replaced almost everything in the front end. My catalytic converter went out at 70,000 miles, I had a warranty and they didn't fix it. My anti-lock brakes and traction control went out and my cruise control switch hasn't worked since about 60,000 miles. I'm just waiting for the day this car just bursts into flames.
While pulling out of parking lot vehicle commenced to smoke severely. Vehicle taken to a independent repair shop, and informed that catalytic converter had gone bad and needed to be replaced. Feel free to provide us with any further information concerning this matter.