99 Jimmy/Blazer 4x4
Hello, The 4 wheel drive stopped working in my 1999 Jimmy (same car as a Chevy Blazer, just made by GMC). I got 103,000 miles on the car. I've had the car since it was new and always used the 4 wheel drive at the proper times (snow, ice..ect.). It'* always worked perfect. I've kept the fluid fresh. It has GMC auto trak 2 fluid in it. It'* got the so-called "automatic transfer case".
When I press the 4-hi button, the 4-hi light blinks like it'* supposed to, but normally, it only blinks for a few seconds, and then comes on steady. Now it just keeps blinking and the car stays in 2 wheel drive. When I press the 2-wheel drive button, the 2-hi light comes on steady as it should. I've already tried shifting into all gears and reverse while trying to get it to go into 4-hi. But it just won't go into 4-hi.
When i press the button'*, I can hear the accuator underneath the car making what seems to be the usual 3 to 4 second humming and click noises it'* always made, so I'm not sure where to start looking for the problem. I gotta have my 4 wheel drive working, thats one of the main reasons I got the car, cause I like having 4x4 for bad weather.
Does anybody have an idea where I should start looking to find the cause?