Re: Another "Service Stabilitrak / Service Traction Control" issue
A few posts were made on the Acadia forum stating that a bad Brake Position Sensor was their cause for this message. I do believe that it also had the brake lights staying on so you can check this easily. If this is your problem, a new sensor has to be calibrated with a Tech2 scanner.
The reduced engine power usually comes when it is really cold, in the teens.
My messages were caused by a bad MAF, cleaning it didn't cure it, it needed replacement.
Also since your throttle was dirty, how was the air intake snorkel?