im gettin 12 mpg and the code i got was o2 sensors and im not sure which to get, im choosing from these http://store.summitracing.com/egnsea...115+4294859014

 

I personally would only buy AC Delco which is factory.

 

i was thinking the ngks on there would be fine, but i have heard the acdelcos are good...

 

Just about everyone says that you should only use genuine AC Delco o2 sensors...

I think the part # is 25312184

They should run about $35 each plus shipping

 

alrite, is there an online site i can get em from or the dealers or what?

 

I've purchased GM stuff from their online store:

http://www.gmpartsdirect.com/

It usually comes from some dealership on the East Coast. Don't get too excited about the "low" price, because they really nail you for shipping and handling. You just need to check if their cost with shipping and handling is cheaper than going directly to a dealership where you pay sales tax, but no additional shipping.

As for part numbers, check Shoebox's website:

http://shbox.com/1/Parts.htm

Depending on how old your O2s are you..you might consider replacing all 4 or 2..depending on which year you have.

 

so this is it http://www.gmpartsdirect.com/results.cfm ?

 

http://cgi.ebay.com/ebaymotors/AFS75...spagenameZWD1V I found some 3 months ago for $35 on Ebay with the S&H included. I check back once in a while for another deal if there cheap. The GM dealer in Spokane is $70.