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im sorry to hear that. does the truck have AFM/DOD (active fuel management)? i have a 08 crew cab with 5.3L, great truck till 100k. got the same warning. then misfire in cyl 6, then a slight sqeaking sound. ended up being a lifter failed and chewed up my camshaft and lifter. its a huge problem with these 4 gen trucks. not so much on the 4.8L from what ive seen. I had to change the cam. and i deleted the afm crap so there is a lot more stuff to change out but i dont want that problem again. There are kits to delete the afm and while your in there might as well do some upgrades. Good luck, hope its still under warranty. Also there is a chevy tsp about this issue. do your homework, the dealer dont like rebuilding or replacing the motor.Report it
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