After Bridgette Reyes made a steal, Neves connected again from beyond the arc to give the Lions (25-2) a 65-63 advantage with 1:06 remaining.
After senior reserve Nondi Johnson blocked a Westmont shot in the paint then collected the rebound, Vanguard cashed in the ensuing possession when senior Rachel Copeland sank a three ball from the left corner to ignite a deafening roar from the home fans.
Westmont (18-13), the tournament’s No. 6 seed, which was 9-11 in the conference regular season, finalized the scoring with a three-pointer by senior Jessica Case with 14 seconds left.
After Copeland missed the front end of a one-and-one free-throw opportunity with 12 seconds left, Case drove the lane only to miss an off-balance attempt from five feet that was rebounded by Reyes.
Reyes missed from the foul line with two seconds left, but the Warriors’ subsequent heave from three-quarters court was not even close, allowing the Lions to claim their 16th straight win and their second straight GSAC tournament crown.
The Lions, NAIA Division I champions two seasons ago, will make their ninth straight trip to Jackson, Tenn. for the NAIA Tournament March 17 through 23.
And they will make the trip a little less confident, after Westmont stopped a run of lopsided decisions.
The Warriors, who needed to win to advance to Tennessee, made nine of their first 12 field-goal tries and led by as many as 12 until Vanguard finished the final 5:05 of the first half on a 17-2 run to go up, 42-39, at intermission.
Vanguard opened the second half with a 6-0 spurt to make it 17 straight points, but Westmont mustered one final surge, eventually pulling even at 59 with 3:18 left.