ok this morning on my way to work, the freeway was empty.. going along with a trailblazer SS on the lane next to me.. it was my turn to speed a lil to take the exist coming ahead to head to work.. that punk wont let me go in front of him.. so i put this baby on sport mode and gunned it which he couldnt catch up to me

at that point... but the time i get to the exist i looked how fast i was goin thn i releaized i was doing 120 on 65

so i slowed down and drove safly to work.. put when i stoped at a read light, the SES ( service engine soon) light came on

.. i didnt sweat it, i said ill check it out when i get off work...on my way home i stoped at auto zone to get it checked out for free.. they told me its the mass air flow sensor.. but i havent noticed anything different on my truck starting it or shutting it off or driving.. could it be true, or there readers are different thn the dealers

... so they want $285 for some after market MAF.. should i be concerned about changing it ASAP.. is it gonna cause any more problems to my baby X.. am gonna call the dealer 2mero and see how much it cost.. until then can u guys give me some feedbacks plz.. can it be cleaned or it has to be changed ASAP & wats the cause.. and if u guys know where i can get it cheaper too..
i would really appericate it.