Hey Chase, thanks for getting this type of information out there for us. I just looked and found a single letter "L" on mine so I now have to replace mine before my tune.
Do you know if there are multiple GM part numbers for the MAF sensor? Will one denote a "strong" vs a "weak" MAF sensor? From what I've read on this forum only the single letter denotes the type of sensor, "weak", correct? But are there multiple part numbers from GM for the MAF sensor? Thanks