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  1. big3500

    Clunk When Sudden Lift From Gas Pedal

    I have the parts to replace the U-joints and the driveshaft mount bracket. But I wanted to ask in case I am missing something. Thank you @wirlybird. Merry Xmas.
  2. big3500

    Clunk When Sudden Lift From Gas Pedal

    Hello, My ‘94 c3500 extended cab dually has a clunk jolt when I let go of the gas. No matter what gear or speed. I already replaced the motor and transmission mount. Can you think of anything else that might be producing this? Thank you in advance.
  3. big3500

    Light problems

    On the blue wire that goes to the radio name dim, to trigger a relay that will supply 12v signal, just not drawing it from the dimmer circuit itself. Let me know if I am off the path here.
  4. big3500

    Light problems

    Only the dimmer circuit is connected to the switch. And it draws more cuz of poor design I think. I like the relay idea. Thank you.
  5. big3500

    Light problems

    HU as in head unit(after market radio) with a screen. Only the dimmer circuit is by design attached to the light switch, so screen know when to dim at night. This is the source of all this evil.
  6. big3500

    Light problems

    Well, I seem to have found the root cause of my issue and solve the problem. The issue is in the light switch, which overheated from the amount of current that my new 7in HU screen draws. Good news is that all one needs to do in this cases is open the switch and clean the carbon out of the...
  7. big3500

    What transmission is in a manual 1994 C3500?

    Cannot stress this enough.
  8. big3500

    Hi y’all from Dallas, GA

    Thx, I think is a Harley combo of some sort. Lol
  9. big3500

    Hi y’all from Dallas, GA

    As requested.
  10. big3500

    Light problems

    Any luck with this. I am in the same boat. In my research, I have come to think it has to do with the aftermarket HU. Can you tell me if you solve this yet?
  11. big3500

    Temp gauge issue

    Hey there, I will monitor this thread as I am in the same boat.
  12. big3500

    Hi y’all from Dallas, GA

    Hello, I live in the beautiful State of GA and own a hard working GMT400 C3500 Extended Cab 5-speed Dually 6.5L. I come to learn and share knowledge and ideas.
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