Captain John Terry, midfielder Frank Lampard and defender Ashley Cole are all out of contract in the summer and are unsure whether they will be retained next season.
Cole, who has yet to be offered any deal by the club, broke down in tears on Saturday as he joined Terry and Lampard in saluting home fans following the goalless draw with Norwich which could be his final game home game for the club.
Terry has also been left in the dark after opening contract talks two months ago, while Lampard began negotiations over a one-year deal in February.
However, Grant, who guided the club to the Champions League final in 2008 after replacing Jose Mourinho, says Chelsea can be a better team next season with all three players.
"Chelsea have a good squad for next season," he told Sky Sports News. "If you can use those players Lampard, Terry and Cole, sometimes not even all of the season because of their age, but if you can use them it would be good.
"Especially if you want to buy and I know that Chelsea want to buy a young talented player, so the balance needs to be with an experienced player.
"I don't need to make a decision but I think all of these three can make a contribution, not for all the season, but they can make Chelsea better."