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Re: 1998 Sierra 4x4, all 4x4 lights slowly blinking
You need to take the box with the control buttons out of the dash...open it up and resolder the small solder joints. Or, the dealer sells them for like $65.00. Mine did the same thing and that's how I fixed it. The joints are small and crack over time. I used one of the new battery operated Coleman ColdHeat soldering guns because it has a small tip but any good low wattage gun like from RadioShack will work fine. The hard part is getting the box open, I did it and I'm all thumbs.
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