I am obviously not in-the-know by asking this but if I want to replace my Thermostat-side Bleed Valve, how do I know what Part Number to tell Chevy? ...I'd rather *know* the P/N than allow the dealership the opportunity to screw things up and order a Water Pump-side Bleed Valve.

what year is your car, and what engine? I can get that part number for you.

what year is your car, and what engine? I can get that part number for you.

1996 3.1L

Is such information closed to the public?

Your part number for the thermostat side bleed valve is GM#10070107 (dealer retail is $8.72). Actually, both sides are the same part number, just for future reference.

Your part number for the thermostat side bleed valve is GM#10070107 (dealer retail is $8.72). Actually, both sides are the same part number, just for future reference.

My eyesight must be bad b/c the T-Stat valve looks larger. But I believe you over what my eyes told me. :D

I appreciate you doing this for me. Is there any means for the general public to look up such information online?

You can look up AC-Delco parts on line, because AC-Delco, even though it's owned by GM, is still an aftermarket parts company. The GM parts catalog is trademarked, and includes information GM doesn't want their competition to have, so you cannot post it on-line.