GMC O2 sensor failure

[Uturn]

Ouch, for $200ish you could have bought your own OBD11 code reader.

 

[camarogreg]

I have two 2005 gmc with the 5.3. Each has 160+ km. I have changed four o2 in one truck, one in the other truck. Not sure why one truck is good and the other not. I also had to change the y pipe, did it myself at about 700 bucks plus two sensors (about 150 each). Other than that, the truck has been awesome. I bought a scanner for 250 bucks and it has paid for itself about four times over now. I have changed the ypipe in a 2005 ford at work at a parts cost of 2100. I look at my GMC and don't complain about parts prices anymore...