What size bolt is this?

[LukeZ34]

I noticed I was missing a bolt on downpipe bracket. What size of bolt is this?

[R Dubya]

Same problem here.  Lost them during my rebuild.   :oops:

10mm bolt with a 1.50 thread pitch and 20 mm long.

Part # 11504595

All courtesy of Jeff M.   :D

[LukeZ34]

Yea, I think ours was lost when the engine was pulled to rebuild the tranny a few years ago.
That part number gives me a 10-pack of those bolts. I may just go to Home Depot and see if I can find a replacement that fits.
Thanks!

[R Dubya]

tell those bastards you don't want 10, you only want 2.  Shit I'll get you two and ship them to you.  They are supposed to be there to help not sell you what you don't need.

[LukeZ34]

I just did a Part # search on GMPartsdirect and that's what came up. Under 'Pack Qty' it says '10'. Though it IS only $1.15 for all 10 of them, I just don't want more little bolts sitting around that I'm never gonna have a use for.
If you have a spare sitting around you want to part with, let me know.

[R Dubya]

ah I thought you were talking about a local dealer.  They will get you what you need, list price is $2.04/ea.  It would cost more for me to get them to you.   :lol:

Any GM dealer will get them for ya.  Good luck.