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  1. J

    Lifters gave error code

    My dad has owned the car for about 5 years now its a 1999 gmc suburban k2500 with the vortec 454. It made a sounbd once and my dad instantly pluged in the obd reader. The reader stated that something was wrong with a cylinder firing order (I belive it was cylinder 6 or 4). He told me I can have...
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