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The lights came back on the next day when I started the truck to go to work. Still every now and again I start the truck and it is in auto 4WD or in 4HI or LO. Took the truck to a dealership(one that my buddy works at so I didn't get charged) had him hook up the Tech 2. I did not catch what...

UPDATE: Driving today and the lights on the 4 wheel drive switch have gone out. Now it just says service 4 wheel drive on the dash. Not sure where to go from here. Any ideas?

Hello all, Sorry if this has been posted before. I have a 2004 Tahoe Z71 with 190k on it. I started noticing that when I turn the truck on, it is in 4hi or 4lo. When I pushed the switch to put it back in 2hi, the switch would blink and then stay in either 4hi or lo. After multiple times it...