My 2010 Buick Enclave Cxl acting funny want can I do..The dealership is retarded

What is your question?

My car first showed service traction control then it showed service traction control and Stabilitrak now it's showing those plus the engine symbol is on it's not blinking is just on and recently 2 days ago service airbag came on and then it went out it hasn't came back on I went into another form and I was told that the codes I had are unusual codes.. it also States engine reduce speed so I can go anywhere from 20 to 40 and where I live is Hills Hills Hills and more Hills with a little bit of extra Hills so when I'm going up the hill I'm going 5 miles per hour the dealership is giving me a hard time does anybody have any solutions to my problem out there

What makes this problem better or worse?

I don't know. Possibly speed and cold weather

How long has your 2010 Buick Enclave had this problem?

3 or so weeks