After a disappointing second half of the season for Kenny Jackett's Welsh side - they sneaked through to the play-offs having won just two of their last 14 League matches - the manager sought to revitalise his attack at the expense of Trundle.
The Liverpool-born frontman was a 67th-minute substitute in the first leg at the Liberty Stadium on Thursday, with Jackett preferring the diminutive Leon Knight, who last week struck a hat-trick at Chesterfield when Trundle was an unused substitute. Trundle's cameo, however, helped salvage a 1-1 draw for the Swans against 10-man Brentford, who led through Jay Tabb.
Full-back Sam Ricketts was Swansea's goalscorer with an 87th-minute deflected long-range shot but it was Trundle's direct running which posed the greatest threat to the Bees' defence.
Asked about his chances of gaining a starting spot in the make-or-break midday match at Griffin Park, Trundle was diplomatic. "It's up to the manager, all I can do is try my best," he said. "I'm not bad getting up in the morning so I'll be ready!"
While Jackett admitted home advantage made Brentford slight favourites for the second leg, his cult hero was in more bullish mood and used Leeds' semi-final play-off victory over Championship rivals Preston as inspiration. "We have got to go there thinking we can do a job," he said. "This is just like a cup final."