5X115,...... I HAVE HEARD THAT A 5X114.5 WILL ALSO BUT IT DAMAGES YOUR WHEEL STUD AND COULD EVENTUALLY BREAK THEM OFF, SO THE ANSWER I HAVE FOUND IS 5X115MM
66 Impala bolt pattern is 5X4 3/4
No . Cavalier's bolt pattern is 5X100 & Impala's bolt pattern is 5X115 . Close but no cigar.
The bolt pattern is: 5 x 127
5x4.75
5x115
5x115
5x115
5x115
5x115 5x115
5-115 Bolt Pattern.....
Bolt pattern is a 5x 115mm. Many of the larger GM cars, and Equinox, use this pattern.
That bolt pattern is an 8 bolt pattern.