Tonycal

So I have a 2014 sierra 1500 with a 5.3 L. I put a super chip programmer on it so I can program it for a better fuel mileage I am getting around 22 mpg gallons to 24 mpg on the highway now . A few people have told me that the active fuel management when it goes into V4 mode it doesn’t put oil to the lifters on the cylinders that are not firing so it makes lifters collapse which ruins the whole cylinder head and sometimes can ruin the piston. I was wondering if anybody knows if any of this is true also I know my programmer turns off the active fuel management but I was wondering how much does it actually improve fuel mileage? Is it a good or bad idea to shut it off? Well my engine actually last a lot longer and will I be guaranteed do not have any lifter issues if I turn it off? Any advice would be greatly appreciated. The thing is I don’t want to ruin my engine but I also want to get the best mileage per gallon as possible.

Hello I have a 2014 sierra SLT fully loaded every option in the world that I just purchased a few months ago. It has the lane departure control and it also has the forward collision alert. I’m not quite sure if it is working correctly. When I turn on the departure control if I swerve a little towards the other lane the alarm goes off so that is all working fine however the seat does not vibrate. I’m not sure if it is supposed to or not but from what people tell me on my truck it is supposed to vibrate. Also the forward collision warning when I turn it on and I am far away from somebody the light is green as I get closer it turns yellow but then you have to almost hit the person in front of you for it to turn red and for the alarm to go off. I tried it on every different setting for variations of how far you wanted to go off and no matter what I do it does not turn red and the alarm go off until you are literally about to crash into the car in front of you. Again also with this the seat never vibrates and I am told that it is supposed to vibrate with this. I am hoping somebody has the same truck as mine with this option and can tell me why does he does not vibrate and also why does it not warn me on the forward collision until the second I’m about to hit someone. I have only turned it on to test it I have never used it to rely on it as obviously the way it works I would have crashed before it even told me the alarm that there was a car in front of me.Thank you.