bad clutch bearing
Haynes makes a manual with the wiring schematic for the O2 sensor on a 1991 Chevy Blazer S10. The manual can be found at most book stores.
Loud noise is not a good description. If its a loud squeal turn the air conditioner or defroster off. If the squeals goes away the compressor or the clutch for the air conditioner compressor is locked up.
Need to know what year it is, it makes a difference.
What makes a supercharger squeal like a bearing is going out
sounds like the belt. one of your pulleys might be loose also. so check your belt and everything it touches.
Could be a plugged fuel filter or a bad fuel pump.
the blazer was stoped being produced in 2005
Yes. it is the same as S10. Alston Cassis Works, makes a kit, with everything you need, from mounts, to headers.
There are three models of the Chevy Trailblazer. The standard model, the EXT which has a 3rd row seat and makes it a 7 passenger and the SS which is super sport.
Your 1983 Chevy S10 Blazer might stall when the accelerator pedal is depressed because of a clogged or dirty fuel filter. Gas that is mixed with water or condensation from the tank can also cause this issue.
There are no new 1990 cars since this is 2017 and that makes a 1990 car very old.
The belt will not generally squeal, but the water pump often makes a "Scrapy-scrapy-scrapy" sound.