I need to replace the MAF sensor on my '00 gtp and was a bit surprised to see it costs $135 from auto-zone. Are their any suggested alternate brands that would be cheaper than OEM?

actually, thast not even oem, yes its the same as the factory, but auto zone parts are aftermarket. if you call a dealer to get the actual oem part, it will be way more expensive.

There are always alternatives if you look hard enough. Beware, AZ MAFs are remanufactured and have a high failure rate. Here is one of he best deals around. It is a brand new OEM GM MAF sensor. $119.00.

http://www.zzperformance.com/grand_prix/products1.php?id=378

I have had luck looking on e-bay and forums. Alot of guys swap out for upgrades and such.
$119 for new one is a really good deal. I will say that most AZ parts come with a warranty though.
If you can't find a good used one I say go for the $119 one.
Peace,
Hallboy

In case anyone wanted to know, my dad called me up yesterday. He's got a friend at Napa who can get me the sensor for $70 with a lifetime warranty. Picking it up in a few hours.