MAF sensor & wiper delay circuit board location

I read the post from BlazerLT about the MAF sensor cleaning but I don't know where it's located. I would also like to know where is the wipers delay circuit board as I have troubles with the wipers delay and I want to check the solders. My truck is 2001 4x4 Sonoma SLS, if someone could help me locate theses two things, I would really appreciate!