i notice when i push the button on the shifter it does not light up
my 99 chey silverado 1500 the two front wheel will not engae when the truck 4wd
on 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