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Q: I am getting a po102 code on my 96 GMC pickup up truck. I tried 3 Maf sensors. on 1996 GMC 1500 Pickup

Still get code PO 102. Each timeI reset the scan tool, start truck and book, the light comes on every time. Checked the connector. The dec says I'm suppose to have a min. of 1 lb of air, and it shows 0. I believe I have a wireing problem, or I also noticed that one of my o2 sensors have been vibrating on the cross over bar which holds the transmission. This has bugged me for two week or so, and would like to get it fixed. Can anyone out there lend a hand?
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