One problem related to catalytic convertor has been reported for the 1997 Chevrolet Tahoe. The most recently reported issues are listed below.
While driving on the interstate at 65 mph rpm went up to 3000 and the vehicle started to slow down,pulled to the side of the road you could smell something that was burnt I made it to a garage had it checked out I was told that the converter was burnt it got hot and blew trans fluid out the overflow and that at the least the converter would need replaced.