T55 TORX BIT ON THE FRONT 12MM SOCKET ON THE REAR!
55
You will need a T55 Torx bit to remove the front caliper of a 2001 Silverado 1500. A torx bit is a screw with a six point star shaped head. These come in different sizes.
T55
The 2004 Silverado HD uses a t-55 torx bit to remove the caliper. The torx can be found and most any auto parts.
T55
T - 55 TORX, Across the board for similar GM's.
Torx is a 50 and they are really tight.
t-45 torx
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A 1995 Beretta front brake caliper is not held on by a Torx bolt. Use a 3/8" Hex key.
t45
Caliper retaining bolts. Torx T-40 or T-45