Is it an automatic or manual if it's an automatic you may have a bad u joints and same for manual, as well as synchronizing gears may cause it to be hard to shift. Otherwise i'd say it's your u-joints
First thing to check is fluid level. The vehicle is getting older may just be wear, try adding "Lucas Transmission Conditioner" But be sure to first remove enough fluid to keep from overfilling.
Sounds like the front pump in the transmission is tired.
Battery first. Main Power fuse second. Bad Ground connection third. Ignition switch fourth.
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!
I believe that the first digital cluster on a S-10 Blazer was in 1989.
It has been awhile, but I think it was 1971.
check ground first
1993 was the first year the automatics used the electronic 4L60E transmission. Any 1993 - up Blazer/Bravada/Jimmy/S10/S15 automatic transmission should do.
2004 Chevy Blazer has two catalytic converters. One up close to the engine just after the pipes from the exhaust manifolds come together, and one down closer to the middle of the vehicle. The first one is sort of round, and the second is more flat and wide.
My first guess would be the fuel pump is at fault.
In 1969. It was also called the "GMC Jimmy".
I thought I could remove and replace the transmission in my Blazer, I did get it out but I didn't want to put it back in so I paid a local shop to come and get the blazer, transmission, and all the parts that had to be removed to get the transmission out and finish the job. I would suggest that since you are asking this question, maybe you would be better off going to a transmission shop in the first place. Mine is an automatic, a standard transmission would be much easier.