Star bit on front brake 2000 chevy 1500 ?

The one that fits. You buy a set for 20 bucks! They are called Torx.

https://www.homedepot.ca/product/husky-1-4-and-3-8-inch-drive-torx-bit-socket-set-11-piece-/1000774379

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What size is the bolt? Could be rusted.

Probably is a T-50 bit that fits on your rachet...you can buy a set of star key bits...these are not allen wrenches...Hope this helps.

If its the cylinder for the rear drum brakes and not the caliper bolt it is a e6 female torx socket or wrench that will remove the two retaining bolts.

put the star bolt remover into its socket and hit the end hard after soaking it in wd40....you wont hurt the threads or the bolt....

yes there are all sizes and cheap to buy at the auto shop.adrian,,,

I just did my front brakes yesterday and it needed a star drive ( torx wrech ) bit, not an Allen wrench

You need two special tools 1. A T60 torx bit to remove the caliper bolts 2. A caliper piston compressor two large c-clamps will work but compress evenly and SLOW

Sealed unit needs special socket.

Jack up the tire you are working on then remove your wheel (13/16 socket?). Next, The Caliper is held on by two bolts, they will be tight and I'm pretty sure the head is a special star, M15 size maybe? Whichever one you can get loose, loosen it and remove. Then the caliper will pivot away from the rotor on the remaining bolt. You may have to stick a screwdriver in between the rotor and the caliper and pry up slightly. After the caliper and rotor are seperate from eachother, the brake pads will both slide out. Replace and put back together in reverse order. IMPORTANT- clean everything with brake parts cleaner including the back of the pad, but make sure you do not get cleaner on the rotor or the part of the pad that touches the rotor. It's important the back side of the pad is clean, however, because this prevents squeaking.