RE: O2 codes
 

the two o2 sensors with taxes cost roughly $140
http://www.autozone.com/N,16000117//...eResultSet.htm

that was with a 10% discount from autozone for buying two..
The wife says today when it started running poorly the SES was flashing and once it started to run normally it quit flashing.
I'll have her stop by autozone tomorrow and get some codes.

RE: O2 codes
 

http://www.autopartswarehouse.com/se...98%20Chevrolet

this is more like the cost i bought mine for. i think i was at an orielleys or something like that. i just know i didnt spend no $70 each :D

RE: O2 codes
 

she finally went and got a code....
PO101

RE: O2 codes
 

P0101 - Mass Air Flow (MAF) Sensor Performance

You may try cleaning it and seeing if that helps any. Otherwise you may have to replace it.