2002 blazer 4wd light flashing.

Hi, I have 2002 blazer zr2 and when I push 4hi, 4lo, or 4auto it seems to engage but the light keeps flashing?

Hi, I have 2002 blazer zr2 and when I push 4hi, 4lo, or 4auto it seems to engage but the light keeps flashing?

Are you sure it is kicking into 4W?
Can you feel crow hop in 4W?

If light is on or flashing get it on a transfer case capable scanner and test shifting and get and post back codes.

How many miles and has the transfer case ever been serviced wit GM blue fluid?