All Interior and exterior lights flickering .

[Peppamint]

I have replaced the battery, Alternator, had the 1998 Tahoe tested at Advance. have checked for lose wires or ground. Please help I am missing too much fishing!!

 

[SunlitComet]

You have a loose or corroded wire somewhere or a loose fuse in the under hood block somewhere. Keep looking.

 

[GangstaCowboy]

I had a similar problem and it ended up being a bad connector on the ground cable to the battery. I turned the car on and all the lights and jiggled all the wires till I found it.

 

[DallasTahoe]

ive got the same problem but cant find where its coming from, when I wrecked my truck last month I went through it and cleaned all my ground and battery wires and still no luck

 

[YukonButICanToo]

Disconnect the battery and tighten all of your grounds and look for corrosion as well...you'll be fine!