Hi
I just bought a 1999 chevy blazer 4wd with 170000 kms(about 100k miles)
The guy I bought it from told me that the right hand side wheel bearing is done for. The symptoms are as follows:
1. Pulsing sound from the passenger side, starting at around 50kph till around 80kph where it becomes more continuous
2. No steering wheel vibration
3. At low speed, no issues at all

It does look like that the wheel bearing needs to be replaced on the front passenger side, but if I am wrong I would be ever so grateful if you let me know
I also have couple of questions:
If I am to replace the wheel bearings, should I replace both front ones? Only the passenger side? or all four?
Also, are the wheel bearings different between the 2wd and 4wd models?

Thank you very much

 

very well could be the bearing

bad bearing growl, and the noise will become quieter when the bearing is unloaded and louder when loaded... try high speed left then right sweeping turns to test this

 

Thank you very much
After driving it for a bit, I am more convinced that it is the wheel bearings, I tried sweeping left and right at a bit higher speed, and when the weight shifts, I can clearly hear it, and it starts fading when going the other direction. I think I am going to replace both since I can also hear the left side going bad, it is just hard to hear over the other side's noise.

Now I googled wheel bearings for blazer, and I got a lot of results, which brand is the best? I've been mostly a Japanese car kinda guy lol
I bought this car at a very good price for the mileage(900CAD) and I am kinda using it to slowly build an off road vehicle, and to learn

I found these very informative videos online, I am mechanically inclined, so I think I am going to attempt it myself, what do you think?

 

sure go for it. if live in the rust belt...you won't be able to pry the hub assembly of like the first video...bfh