Blinking 2hi/4hi lights

while removing my transmission from my ZR2 4x4, I noticed the connector going to my transfer case was loose. The 8mm/ 5/16 bolt was loose. I have been having the same problem that many of the people in the forum have been complaining about their 2hi/4hi/4lo light blinking and not staying on. I think this could have been the reason the light doesn’t come on and stay on. The loose connection on the connector going to the transfer case. I won’t know for sure, until I put the tranny back in. But, I’ve been working in electronics for 30 + years and have seen my share of cold soldier joints (loose connections). If nothing else, it’s worth the time to tighten the bolt to see if that fixes the problem. This could also keep the vehicle from engaging into and out of 4 wheel drive.

Good luck! Let us know your findings!