I have a 2008 gmc canyon it keeps stalling out on me with no warning it is pulli

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it is pulling code P0601 i took to dealer they gave me an estimate over 600. dolars and said the ptm has to be replaced. my question isnt this covered under a recall that i just herd about please let me know i dont want to pay for something that is covered under this recall. it happens after truck is warmed up and sometimes at an idol i can restart after a couple of minutes but im afraid this will happen on the freeway