Other City scorers on the night include Leroy Sane, Sergio Aguero (two goals), and Pablo Zabaleta.
Sergio Aguero is making the most of his reprieve at Manchester City.
The 20-year-old got the faintest touch on a cross to score City's last goal in stoppage time.
Sterling will be one of players that Guardiola will be hoping can make a difference.
Brazil striker Gabriel Jesus' arrival in January saw Aguero drop down to the bench until the starlet suffered a broken fifth metatarsal in his foot at Bournemouth last month. "I'm pretty sure he's coming back".
But the morning after the night before it emerged that Aguero was still waiting to be personally informed that he remains part of Guardiola's plans.
Ilyichev replaces Churkin as Russia's United Nations representative
Ambassador to the UN Nikki Haley said Tuesday that Churkin was quote "brilliant, wise, gracious and amusing ". General Assembly will schedule a special meeting to pay tribute to him.
Aguero has scored four goals in his last two games and after impressing towards the end of City's Champions League clash with Monaco last week he played sufficiently well against Huddersfield for Guardiola to hail his performance as "the best I have ever seen from Sergio".
Ultimately, Huddersfield was outclassed, which was to be predicted after making nine changes from its first-choice lineup.
A late strike from sub Kelechi Iheanacho would seal the deal for the Premier League side, which sets up a quarter-final tie between the teams of Barcelona legend Guardiola and ex-Real Madrid defender Aitor Karanka at the Riverside Stadium on March 11.
Harry Bunn gave the Championship side the lead in the 7th minute, to put them ahead on aggregate - the first leg ended goalless on February 18. There was sarcastic applause from some City fans when he saved Huddersfield's second shot on goal just before halftime.
Pep Guardiola has indicated that England goalkeeper Joe Hart's Manchester City career is over, regardless of how well he performs at Torino.