Car is missing occassionly. more when using cruise control and going up incline. on 2009 Buick Enclave

Tried fuel inject treatment, gas treatment and premium gas

Yesterday, for first time engine light blinked off and on when it happened

Asked by for the 2009 Buick Enclave
You need to take your vehicle in to your local auto repair shop to have it scanned to find out what codes are affected. Goodluck