2009 GMC Acadia SLT AWD

Bad gas or maybe all your spark plugs are bad.

It could be a bad intake gasket or depending on the car coil pack

I have the same problem i change the engine coils n work fine like the next 3 months n now 1 misfire n then i change the coil n next month another one n i can't fine what is causing the problem but pay for a better gas is a good start let me know how u fix u problem

Has anyone found a solution to this?

I have been going back and forth with the dealership that I just bought a 2009 GMC Acadia from for 5 months now. Continuous misfires, replaced 4 coils, one of which was the same one twice. Then I had to replace the catalytic converter. Then a purge valve. And it's back in the shop again! They consulted GMC and said they now need to replace all of the coils and spark plugs and the engine control module. Luckily I got it put in my sell agreement to fix whatever the engine light issue was so I dont have to pay for all this because it's a few thousand dollars in repairs now.