Other Fuel System Pump problems of the 2009 Chevrolet Traverse

I keep getting multiple random engine misfires that there seems to be no solution to fix the problem. The vehicle has been to the dealership several times. Runs for a while and starts acting up again. Stalls out when attempt to take off after coming to a stop or just starts to move and goes real slow, also has trouble getting up hills due to loss of power. Keep getting told it's catiloc converters and have replaced 3 times in last year. Have also replaced spark plugs and coil overs as well as fuel pump, mas airflow sensor, map sensor, oxygen sensors, and a few other things. Seems there is a lot of people with the same issues but no fix. . . .

2/12/2014:car would not start in driveway -towed to jpchevrolet: control module fuse blown;replaced fuel pump control module -engine started and ran properly per dealership. (all covered under warranty). 7/24/14-check engine light timing chain issues gaskets/seals all under warranty. Remote lock transmitter stopped working could not reprogram - had to buy new one 0n 1/19/15 at same time asked to check surge of vehicle when drivg 40-45 mph - could not diagnose. On or about 2/15/2015: check engine light on - next day car would not reverse -again in the driveway -pushed car to road drove to dealership. Needed a transmission-only 62780 mi. On car-no choice had to fix and no help from gm in michigan - "could not help me" car is not even 6 years old -bought in December 2009 and cost $3473. 19 to fix. Also again replaced fuel pump after exactly one year - under warranty. . . . . . Am very unhappy and dissatisfied with this car and feel it is unsafe to drive. Gm is aware of transmission problems due to wave plate broken & metal going thruout transmission causing damage which was indicated on my receipts. Lots of problems with 2009 thru 2011 Traverse. Am retired on social security and a pension not exorbitant - bought this car for me and my three young grandchildren and thought this would be my last car to purchase - was I ever wrong. . . . . .