04 Silverado

Asked by Oct 03, 2017 at 12:47 PM

Question type: Maintenance & Repair

Hello I'm new to any of this but I have an 04 Silverado 1500 4 by 4 with the 5-3 I bought the truck and had a spare truck to got wrecked and the new truck had a lot of stuff wrong with the motor so I pulled the motor out of my old truck and put it in my new truck and now the lights kind of got a flicker to it whenever it's running driving all over it just they just kind of like flicker a little bit and when it first starts up it kind of surges back and forth like a goes to 1500 RPMs back down to 5500 RPMs and then up I was wondering if anybody know what that could be if I didn't hook up a ground or ride or if I didn't hook up something if there's something that it could be but it runs good and drives good it's just that with the lights it kind of does that and then overnight the battery will go dead

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