BURNLEY became the first team to succumb to Bristol City at Ashton Gate this season.
The Robins, who had not picked up a home win in seven previous league attempts, but under new boss Derek McInnes they took advantage of some wayward defending end their barren streak.
Ross Wallace became the first Burnley player since Garreth O'Connor in 2005 to score in four consecutive league games when he cancelled out debutant Stephen Pearson's first half opener in the 47th minute.
Pearson had bundled the ball in just before the break to give the struggling home side the edge.
Burnley would have been equally disappointed with the second goal they conceded on the hour.
The Clarets thought they had got away with it when Nicky Maynard broke the offside trap and cutbac for Albert Adomah, who fluffed his effort. But Pearson reacted quickest to the loose ball and crossed for Brett Pitman to finish from four yards.
Bristol City caught Burnley on the break from a free kick to wrap the game up in the 73rd minute.
Adomah sprinted forward after receiving Neil Kilkenny's excellent crossfield ball, and fired across Grant.