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i have 1999 chevy 4x4 z71.The 4wd wont engage in hi or lo lights just flash. on 1999 Chevrolet Silverado 1500

when i push the button light just flash dont know if it is the swicth or what

Asked by for the 1999 Chevrolet Silverado 1500
most likely the switch,scan codes and post so we can adv
2 more answers
most likely the switch,scan codes and post so we can adv
could be the switch or the shift solenoid