Ive been having some problems with static on certain channels in my 01 blazer which has what i believe is the original Delco stereo unit and the bose premium sound pack. perhaps someone known a little trick to fix said problem. most people whom i consult about it says it could be a fault connection between the antennae and the rest of the system but i have really bad luck when it comes to electrical with this truck so i figured id ask here first before i pull a magellan on my wiring harnesses and break something.

 

First you have to define 'static'. Static can be defined as the white noise or atmospheric noise you get when you tune to a very distant or nonexistant in your area frequency. If it has a 'tonal' quality to it.. esp if it varies with engine speed that is a whole different thing.
Usual culprits for that:
Poor radio ground
Antenna connections corroded - very common in older cars.
Cheap/bad spark plug wires, worn cap/rotor
Worn brushes in alternator - primarily staticy with a whir tone background
Bad {partially shorted} diode in alternator - hum, howl or whirring sound
Poor electrical contact between hood and chassis. More common when hood has been off for a while

The above go away when you shut off the engine of course. One thing to do when you are going to ask for help with such a problem would have been to determine whether or not it was only with engine running.
You dont need to be an electrical genius to figure that out.

Then there's radio problems themselves. Only FM, Only AM or Both. If both then CD, too?
also some stations no problem, others distorted or hear 'crosstalk'. Problem in Radio Freq section of tuner. OR Antenna OR ground connection to chassis. Worst when near a high power transmitter tower - TV or FM.

Only happens certain places. Power line problems. There's several places in my little burg where even strong AM is drowned out. I suspect from data over power line installations. Sounds sorta like a dial up modem trying to sync up

 

some channels are fine, some have tonal issues which DO remain when engine is turned off

 

Everywhere or in certain locations? Thinking FM or TV tower nearby.
Anyone else or other car have same issues at same place?

If that condition's 'everywhere', usually tuner issues if all else is equal {picks up distant stations okay, etc}

- BTW. forgot to mention heater blower which also is a big noise source.
And poor ground dash cluster and/or auto climate control. Digital circuits make really good RF noise generators.