Check the wheel bearing. Make sure it is full of grease. Check the tie rod ends and ball joints as well.
engine noise coming thru the radio is caused by a bad ground somewhere so instead of chasing that you go to a car stereo shop and buy a noise filter that hooks up to the ground wire coming off the radio.
an ostrich
If the dash lights go on and off and the heat won't turn off and electrical noise is coming from the heater, there could be a short in the wiring on a 1998 Blazer. This is also possible if the ground wire for these items is not longer attached.
possibly brake pads worn down
It could be an axel bearing but noises have to be heard to be correctly diagnoised.
Perhaps brake pads need replacement or bad wheel bearing
There is no valve adjustment on that engine. If you have noise coming from the valve train you probably have worn parts such as camshaft, lifters, pushrods, rocker arms and valves.
The most likely cause of the whistling noise is loose or worn weather stripping around the door. If this is the case, the sound heard is the wind.
I have a `00 blazer and recently my car started making a loud winding noise also. Come to find out I had to have a whole new transmission due to that noise! The repair shop said that the noise is the first sign of the transmission going out!
If im right about the noise, its your cv joints. You can tell which one it is on hearing which side its coming from. Well I believe its coming from both sides.however i did change the passenger side cv axle but not the driver side.and it only does it when im making a u turn.
wheel bearing or it could be the carrier bearing as was in my case
sounds like your brake caliper is sticking. This would cause the pads to be in constant contact with the rotor.