So I bought a 2001 blazer zr2. It's got just under 129k. Got it for $2650. I had them down to 1900 but it needed upper and lower ball joints, the idler arm and the driver wheel bearing so I paid the seller to do it since he owned an auto body shop.. I had them do both driver and passenger wheel bearings. Now I've got a check engine light on saying bad o2 sensor. So that's next on my to do list. It runs pretty well so I can't complain. The only thing it has that I'm unsure about is a cold air intake. I've had probably 15 cars but I've never had anything other then the regular stock air setup. So I might change it back. Anything else I should check and replace?

 

i would change the fluids, as for the o2 sensor i suggest amazon i got 2 for $26.00 each a few months ago good luck with the new blazer

 

Differential fluids were changed by the previous owner as well as he put a new radiator in about 6 months ago. They had put in hid headlights. I'm going to switch it back to the regular lights. Ill check eBay out and get those o/ sensors. Thanks!

 

Nice score man. Pics?
Check the filler hose on the gas tank, my 97's is starting to rust out according to my uncle. Gas gauge works correctly. If you SES is on have them fools at Autozone run a scan and print out the codes for you.

 

May as well change the transfer case fluid if they did the diffs. If you have. 4hi/lo and 2hi the transfer case takes ATF, if you have those three plus "auto 4x4" the transfer case takes auto track II available at any chevy/gm dealer for $7/liter up here in Canada.