Hello all. My 97 ZR2 4.3 5 speed Blazer has been keeping me very busy these last few weeks. While most thigs are getting fixed pretty smoothly some are not. My reverse lights do not work. I replaced the switch and still nothing. I tested the lights by pushing the little ball on the switch and they come on. But with the switch in the trans nothing. I went to GM to get a look at what works the switch but their brakedown doesn't show anything! Also the latest quark is the transfer case won't come out of 4wd. It will switch from 4 lo to 4 hi but not 2 hi. I will be replacing the vaccuume ball for the front rear with a 4x4 Posi Lok as that doesn't work either. I do hear 3 to 4 clicks coming from the transfer case as the 2 hi light blinks. But thats all it does. Any help would be great! This little ZR2 is trying to drive me crazy! But I won't let her win! Thanks, Steve