Trundle, who has been on loan at The Liberty Stadium since August, will remain on loan with The Swans until the end of the season when he hope's to secure a permanent contract.
"When I came here I had my mind set on extending the loan and now that's happened the next stage is to try to win a contract," he told the South Wales Echo.
"I'm going to do everything I can between now and the end of the season to make that happen.
"I want to finish my career with Swansea and if I look after myself, I can go on for a good few years.
"I left Swansea once because I had to for my career, but I realise going away was the wrong decision.
"Swansea are a club I love especially with the relationship I have with the fans and I want to stay.
"The last thing I wanted to do was go back to Bristol City because I wasn't enjoying training and I wasn't enjoying matches and that was killing me."