Since the infamous "Willis Reed Game" in Game 7 of the 1970 NBA Finals, the Los Angeles Lakers have been in 10 Game 7s. Their record in those games? 8-2. Their only two losses were in the 1984 NBA Finals against the Celtics and in 2006 against the Suns (when the Lakers weren't that good).
That includes the 1988 Game 7 against the Detroit Pistons ... the last time they won a Game 7 in the Finals. It also includes Western Conference Championship games against the Kings, Blazers and Mavericks.
L-@ Suns 2006
W-@ Kings 2002
L-@ Celtics 1984