my 99 chey silverado 1500 the two front wheel will not engae when the truck 4wd
on 1999 Chevrolet Silverado 1500

i notice when i push the button on the shifter it does not light up

Asked by for the 1999 Chevrolet Silverado 1500
This is a very common problem and is usually due to the selector switch. The one I mean is a three button switch located at the left of dash above headlight switch. Another cause may be the actuator on the transfer case. If you can swap out the switch with a freinds to check operation that would be cheapest. Then buy your own if this is the problem I suspect.
my truck does not have that swith does the button on the shifter work with the 4wd