Chevrolet Repair: 4wd will not engage, chevy pickup, transfer case

Question
1989 chevy pickup 1500 when i shift transfer case into 4wd high or low front wheels do not engage there are no noises truck moves fine just no 4wd

Answer
Hi Rick.... what system do you have. is it electric or vacum. manual transfer case or electric. if it's electric check the 4x4 module. also check that electric motor at transfer case has power and engauging...check front actuator for power as wellwhen you try to engauge....if no power try a known good module... hope this helps