One problem related to check engine light on has been reported for the 1999 GEO Tracker. The most recently reported issues are listed below.
Engine stalls at stop lights, lack of power in cold temp. Engine check light blinks on repeatedly. Both dealership and Chevrolet say they need to reprogram the computer but at this date they don't have one written to fix it, I've owned this car for less then 20 days and its been in for repair twice, is this considerd safe when a car stalls at traffic lights, also it has a very rough idle.