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  1. Technical Department
    Problem: 99 tahoe 4l60e 4wd -vibration only between 40-50 mph & only while cruising (very light gas). As soon as u let off gas or accelerate, vibration will stop. Rebuilt engine installed a couple mo ago (Vibration existed before engine swap).Trans was rebuilt about a year ago, transfer case was...
  2. General GM Discussions
    I want to diagnose the issue myself. I plugged the obd scanner and nothing about the 4wd service comes up. The lights on the selector switches come on when I start it up but go off immediately. Nothing happens when I press any of the switches. So far I know to: 1. check the selector switch- I...
  3. Lifted Suspension & Offroad
    Hello, I own a 1985 GMC Sierra with four wheel drive. The front wheels have manual locking hubs and I also have a 4x4 shifter in the cab to engage the transfercase. My question is what parts of 4-wheel drive do the hubs and shifter engage? To be in 4 wheel drive, do I need to lock the hubs and...
  4. Introduction
    Hey guys. New here. I joined in order to talk to people with like interests and get recommendations on my truck. I have a 1996 K1500 4 door 4wd non Z71 Centurion Conversion. 1 of maybe 6 in 1996. I know Centurion converted 30 or so trucks each year from around 1993 to 2000. Some were 4 door long...
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