Can see you haven't worked on a Colorado or Canyon, with the Atlas engines in them. I replaced the timing chain and sprockest last year and just last week it set a new code for the anti- vibration ones. Not going to pull the engine for that, Truck only has 10K miles on it. Only bought it because all of the good second gen s10's aren't for sale. I sure miss those 4.3 V6's.Much less complicated meaning they are less sensor dependent.