This is the part number that I'm finding for it. Gm part# 24502852. Can't find a pic for it though. Check a dealership for the part number, if they give you that part number, order it online. I think they charge $35 for it, and you can find it online for under $5. Im also seeing this part number GM pn# 24504768. Here is a forum that Im seeing the info:

Can anyone tell me what part this is? (3800 Engine) - Monte Carlo Forum - Monte Carlo Enthusiast Forums