The Frenchman's assist was straight from the top drawer.
Giroud cancelled out Sergio Aguero's seventh-minute opener with a bullet header two minutes later for what was his first Premier League goal in nearly four months.
After the break, Kevin De Bruyne wrestled the lead back by beating a questionable Petr Cech at his near post, before Alexis Sanchez latched on to a quite brilliant flick from the big Frenchman to slot past Joe Hart and level up at two goals apiece.
"Yes Giroud has a goal, but he needs to hold the ball up for Arsenal. It keeps bouncing off him back into City's possession," he said.
The Welshman later added: "Can I say, what an unbelievable touch from Giroud! He was tightly marked and had the ball fizzed into him, but it was a wonderful touch to lay the ball off to Sanchez.
"Absolutely sensational touch, and Sanchez was in and gave the keeper the eyes."
With Tottenham losing 2-1 to Southampton at White Hart Lane earlier, Arsenal will finish above their North London rivals in second if they beat Aston Villa on the final day and Spurs lose away at Newcastle United.
That would be a slight consolation for Arsenal fans in a season which has offered very little by way of celebration, with the exception of a top-four finish, but that was always expected of them.