did the MAF look clean or did you clean it with the appropriate cleaner..?? CRC makes a good MAF cleaner available at just about all auto supply stores. the can instructions say to let the MAF dry overnight before putting it back in service.............

 

If I could clear it, I would.

 

Do you know anyone with a code reader? I understand that many of the auto parts stores will read codes for you but they won't clear them for legality reasons. Can or will OnStar clear them?

 

I don't know anyone with a code reader, neithr OnStar nor O'Reilly would clear them.

BUT, the SEL went off last night, though I still have the shifter click.

 

The shifter click is normal - see a couple of the previous posts including post #6 which has a great explanation.

You can try clearing the code by disconnecting the battery for a few minutes. It might work.