This site lists the part numbers if you scroll down. Are they correct? idk, but i think they would be.
Current GM Part Number: 15051014
Previously issued Part Numbers: 15008008, 15008009
FCC ID: MYT3X6898B
They are available on Amazon - I think I paid $13 three years ago. Lately I found an OEM keyfob at the local PYP. I reprogrammed the system to accept both the chinese copy and the GM keyfob. Both work equally well.
When you find one make sure that the buttons are identical in configuration to yours and it should be OK.
Okay, thanks everyone for the quick replies. I have two key fobs for my trailblazer but they don’t work to well, you have to be within 10 feet for them to work. Also they both were the same part number and had the number two on the back, so I wasn’t sure if they were the correct ones or not. Thanks again!