Shifting Issue 07 Terraza

I have an 07 Terraza and seem to have a shift solenoid issue. Trans fluid level is fine. Seems to slip from a stop to go. Shifts fine from then on. Just from a stop. Am I thinking right, shift solenoid? I have replaced them in another vehicle. Same concept or did buick make it more difficult? Check engine light on. Haven't checked the code.

Best to check the codes. I thought it was odd it stuttered from the stop. Bad Gas cap.