A 3/8" Allen wrench will remove that bolt on the front caliper.
9mm hex
.The 2000 Chevrolet Monte Carlo brake caliper bolt size is 9/16. The brake caliper bolt can be purchased at most auto-parts stores
Bolt pattern is 5x135
Bolt Pattern: 5-135
If memory serves, 18mm. That would be the bracket bolt. The caliper bolt has a 9mm thread.
t-45 torx
The size is 9mm hex. It needs to be long enough to reach the recessed caliper bolt.
Either 9mm hex or Torx T-45
To replace brake pads and rotor: Unbolt wheel, unbolt caliper, remove caliper, unbolt caliper bracket, remove rotor, replace rotor, bolt up bracket, compress caliper, replace pads, replace caliper, bolt up caliper, bolt up wheel, repeat whole thing on other side...
On the back of the caliper there should be a bolt its a 14mm you take it out and inside there is a bolt also its Allen key you use and Allen key and retract the caliper. it works on all 626 from 1994 till 2002
2000 ford expedition