4x4 problem 01 silverado 1500 series

When I engage the 4 wheel drive on my 01 4x4 1500 Silverado the light blinks but it will not engage in hi or low range. How do you troubleshoot it. In the two wheel mode the light stays solid Thank for you help in advance or any ideas

Reply to
Larry and a Cat named Dub
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Reply to
WILLIAM PLUMSTEAD

Replace the switch on the dash. gm has a servive bullitien out for that concern

Reply to
polarisracer15

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