I think I got snookered. Just bought a used 2006 1500 silverado with a V6. Ran great during the test drive but it was already up to temp. SES light was on and owner said it needed an O2 sensor. Issue 1, hard to put in fuel. Gas Pump kicks off easily and multiple times. # 2, Hard to start cold(in Fla) it's not cold. Crank and crank. # 3 when started runs rough till up to operating temp.. # 4 While checking out the downstream O2 sensor, noticed that someone has cut open the catalytic converter and welded it back up. Took to autozone and got codes P0056,P0060, 0161,and Po300. As I was told the first 3 are the second or downstream O2 sensor. PO300 is misfire which it does plenty of.
With the Cat cut into and who knows what they did, will replacing the sensor even help? Previously I have read about the fuel vent issue and it's seeming intense fix.
Any order to attacking this mess? Thanks, Jerry
PS, I have already replaced the cabin blower resistor board and harness to bet the blower to run.