O2 Sensors

[baleman]

Hey Guys,

I have an 06 Sierra 5.3 T-Code. Have any of you had issues running aftermarket O2 sensors? I know that the 5.3l are kind of picky when it comes to things like spark plugs, plug wires, and knock sensors. So I was wondering if 02 sensors fall into that category also? GM wants $117ea for the upstream and $119ea for the downstream. I can get all 4 for about $60 on Amazon. 

[davester]

I would buy ACDelco branded ones from a major retailer, such as rockauto.  amazon/ebay, you are more likely to get knockoffs or factory rejects.  If the part is that much cheaper, they have to skimp on the part somewhere...

[CamGTP]

New denso/delco sensor from Napa should be like $40-50 each.

 

You will be complete garbage if you are able to buy all 4 sensors for $60 on amazon.

 

I'd replace the upstreams before I did the downstreams if you have no codes and are just doing them based on mileage/wear. The rear sensors only job is to monitor the cat, the front o2 sensors monitor the fueling and are far more important.

[chem_man]

Either Denso or ACDelco as CamGTP said.  Fairly affordable from rockauto.com. 

[sefiroxx]

AC Delco had become a sourcing rather than mfg arm for gm. Go with Denso or Bosch.