99 chevy blazer

i am having problems with a 20 amp fuse blowing

I have replaced the tccm and the encoder motor and the fuse keeps blowing intermantly

what is it a fuse for?

Try a larger fuse?????

nooo a bigger fuse would be bad. that would cause an even bigger problem. i just replaced an encoder and module last week in a blazer and i learned thet they are a big problem with these trucks. do you have a check 4x4 light on when it blows? if you do then you can go to auto zone and see what the problem is and go from there.