All vehicles have many Allen screws on them. The only sensible and economical thing to do is buy 2 sets of Allen keys, usually 1/32 up to 3/8 in SAE and 1-10mm in metric. They only cost about $ 12 per set and will save you a lot of hassle if working regularly on cars.
Just did this last week on my '97 suburban..... it was a 3/8 Allen wrench.
American cars never used Bristol keys. The Suburban most likely uses a 3/8 Allen key on calipers.
3/8 inch Allen wrench.
It would be either a 15 mm wrench or a 7mm Allen key.
I think that one is a 3/8 Allen.
7/32
3/32"
That is a 3/8 Allen.
Allen Screws.
7 mm. It isn't in most compact wrench kits.
Its not an Allen wrench its a specialty socket. Go to like autozone or a place like that. i got mine at carquest in las Vegas.
on a 2002 it is a 3/8 th Allen wrench Actually the proper ones are a 7mm and 10 mm for the bracket bolts