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Discussion Starter #1
Hello I am experiencing some issues with my 2016 Silverado 5.3. having issues when. Climbing a hill and accelerating at lower RPM the truck starts to lag and jerk. Like misfiring or something. Also there's a noise that slightly screeches when RPM gets high and gears change. Truck runs fine at really high rpm and on flatter surfaces. But I haven't had any Check engine lights come on at all.
 

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Can you smell any gas when outside the truck?
 

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Discussion Starter #3
No I don't smell any gas but I had changed my spark plugs a few weeks back. Canadian Tire had sold me the wrong spark plugs (NGK plugs) I told them my make and model and everything. So I put those in and I had a flashing engine light. I brought to gm dealer and they said NGK plugs are no good so they installed ac Delco plugs and changed the wires as well. No more flashing or constant engine light but the truck runs bad now
 
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