it is the push button type on the dash
my 4wd want go into 4wd when i try to put it into high the light keeps flashing on 2000 GMC Jimmy
The usual problem with the 4x4 in these vehicles is the push button switch being faulty or a faulty transfer case actuator. It is best to have this diagnosed first as there may be a problem with the wiring. If you don't mind throwing parts at your vehicle I would replace the push button switch assembly first.