Push button 4x4 not engaging

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Flywheel4390

Newbie
Joined
Oct 12, 2021
Messages
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Location
Fancy Gap, VA
My truck is a 98 gmc sierra sle ext cab the stock rear end has been replaced with one from a 96 suburban. Also the front axle is from a suburban i also have switched from the thermal to electric actuator/ changed the wiring harness and still my 4x4 doesnt engage? Im getting flashing lights on the switch. I need to know what all is needed to get 4x4 working in this swap? Help would be GREATLY APPRECIATED!!!
 
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