Longer Front Brake Caliper Bolt

[Ramblin Man]

Replacing the front brakes on 2001 GMC Yukon XL.  I was able to remove the Torx caliper bolts without any trouble (treated it as a two-man job, my dad manned the cheater bar while I crawled under and put pressure on the T55 adapter), and they still look good.  

 

The replacement bolts - AC Delco 18K1014 - are  .155 (9/64) inches longer.  There is one Amazon review indicating the bolts may have led to a stuck caliper six months later, but another hundred or so installed these longer bolts and left positive reviews.  These are also listed as a fit on Rockauto.

 

Does anyone know if GM has upgraded to a longer bolt, or if there is more than one setup for the front brakes?  

[davester]

Those could possibly be for the xl2500/xl1500 (the opposite of whatever you have)?  I know for the trucks, they have different brake setups for different trucks (at least JH6 and JH7, either of which could be on my 3500, needed to use the RPO code list to figure out which I had when I needed a replacement caliper).

[Ramblin Man]

I looked around a little more but could not find a definite answer one way or another - that the new length is an updated design to my JC5 brake setup, or that it actually belongs to a different setup. 

 

I've had issues with the wrong part being listed for my cars before - thankfully I was able to re-use the 20 year old originals with confidence (the heads are not stripped, threads looks perfect), but if anyone figures out please share.