it's a 3/8 wrench for both 2003 and 2004 caliper.
T-60
I'm sure it's 7mm Allen.
I believe that is a 3/8 Allen key.
What size alien wrench need to take off brake caliper 1996 Buick le sabra
You need a 3/8 Allen key to release the caliper.
7mm Allen wrench
All Cavaliers from '94 to '03 used 3/8 Allen key on calipers.
I believe that needs a 3/8 Allen or some models, 7mm Allen.
9mm Allen wrench
7mm Allen
You need a 3/8 Allen Wrench
Most likely a 15mm wrench. Unlikely to be Allen in that vehicle.