Wrong chain.... Did you keep the receipt from the dealer? What's the part number? I can tell you if it's right or wrong.
EDIT: a former GM tech here at work said that when you replaced the chain, you moved one of the cams by 1 tooth and now your ECM is trying time the motor and can't, thus giving you a cam off by a tooth. He said that move could have been ever so suttle that you wouldn't have even noticed. He said he did it on a Cobalt SS and drove him nuts for 3 days till another tech helped him with it. - OR - you have a bad cam gear.
Solo Street Race exhaust
ASAP T2 stripes and badging
Windrestrictor V2 lighted in white
Windrestrictor lighted door sills lighted in white
DDM Works IC Piping
Undercar LEDs in white to match Windrestrictor
ZZPerformance dyno tuned - 286HP, 317ft/lbs of torque at 23psi of boost.
Last edited by The_Ghost; 03-20-2017 at 10:41 AM.