This part worked as advertised. I suggest that you look carefully for the existence of the exhaust manifold gasket around the missing bolt before you purchase this. If the gasket is gone it will not seal your leak. My tip on a Tahoe 5.3 is that you do the bulk of the work from under the vehicle. Yes, to the removal of the front drive shaft and that heat shield. Also, this part seems to be balanced so that if you do the top bolt first and just let it hang loose, the bottom bolt hole will be right where the hole in the part is located. Of course the vehicle must be level, side to side. Yes, this is a pain to install but it saves a lot of money when the broken bolt is the left rear like mine. The alternative is to pull off the entire cylinder head. That is a thousand dollars most places and several hundred if you do it yourself. You will also break most of the exhaust bolts getting the manifolds off and have to do tricky extractions. This part is a deal!