Let me know if you need some help. Shoot me a PM and I can look up the wiring schematic to let you know what pins in the PCMs you need to go from to the sensor. You can probably rent a meter from auto zone or orielly's.

 

Checked continuity and everything was good, also got ahold of a Tech II scanner and did a little playing. Found a 0 volt output, and resulting 0 volt input from the computer, leading me to believe that that is where the problem is coming from. I left a message with Nelson Performance, so hopefully it can get straightened out here in the near future.

 

Sweet. Glad you are getting it Figured out. Keep us updated. Very curious as to where the problem is?

 

As am I. I'm just hoping it won't hurt the truck any driving it an hour back home for the holiday break. Hopefully Monday Nelson gets back to me and sends out a new ecm.

 

i've seen a lot of problems with o2 sensor harnesses rubbing on the front driveshaft might be worth looking into

 

Thanks for the tip. Mines a 2wd though, so I can rule that out. I'll keep it in mind for any of my 4x4 friends who may encounter the problem.

 

that makes sense lol

 

Just an update, was out today doing a few more checks and jiggling wires, cleared the codes out and so far they have not come back, so who knows, I may have inadvertently fixed something. Hopefully I did, but just wanted to say big thanks for everyone who helped me with this.

 

Well, went out and fired up the truck the other day and the light came back on. Same heater codes as before (PO135, PO155) so the problem is still there. Think my next step will be to return these o2's and get a set of GM sensors. Otherwise I'm lost as to were the problem is.

 

Did you get your replacment PCM yet??? You mentioned 0 input and 0 output