The 26-year-old recently moved to the Reebok Stadium on a short-term deal that is due to expire in January.
However, with his first-team chances having been limited at Palace during the past few years, Garvan admits that his time at the club could be over.
"There is a slim chance I'll be there next season. You never know, but I love being out there and getting the buzz on Saturday at 3pm. I want to continue that," he told the Bolton News.
Garvan and his Bolton teammates return to Championship action on Tuesday when they entertain Rotherham United.