[KonaBurb]

My '97 K1500 Sub only shows a blinking light when I attempt to engage 4 hi or 4 low. Normally it would have blinked until fully engaged then turn solid. I can hear what sounds like a mechanical engagement, but the light keeps blinking. The transmission even goes into lo range, but the blinking continues. I don't believe the front wheels are pulling, but I haven't jacked all four to see.
Does this sound like the dreaded actuator? If so where do I find one?

Mahalo from Kona, Hawaii

 

[unplugged]

I believe the actuator changed from the thermal type in 1996. GM offered a retrofit to the new style for older burbs, but I just went to NAPA and put the original back in. Works fine so far. Your 97 uses a different style, but I imagine that it could fail. Maybe someone with more info will post a response.