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  1. A

    4x4 won't engage

    So turns out you were right, it was the actuator... I used the spacer trick I read about in another thread, pulled the actuator, put a short socket in there reinstalled actuator (wires disconnected) and presto, full time 4 wheel drive... Thanks for the help!
  2. A

    4x4 won't engage

    Thanks I will replace that and see if it works... I didn't know there was an electronic component on the front axle in this truck. Cheers
  3. A

    4x4 won't engage

    hey guys, I have been searching the net for some answers and came across this site... looks like a great resource for these trucks, I'm hoping someone can help me with this problem. I have a 1990 Sierra 1500 single cab longbed truck... for a while it was making a grinding noise going from 2hi...
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