maxfli11

I'm calling it the plenum. It's the large plastic piece that clamps directly to the throttle body. It's between the throttle body and the and the breather and hose. Found out it was the coil pack on #5. Did get MAF sensor faults along with half dozen others but it did run.

So if i'm reading this right i need three 50ohm resitors in each circuit tied to ground for our LED lights.? Come on GM, you can do better. We have to jury rig out trailer wiring to adapt for engineering short commings.

2022 2500HD: Beyond frustrated with this over engineered mess. Rewired my utility trailer this winter, with new LED's and wire. Couldn't get it to work. Took several hours before i made a profile for it and told the truck what exactly it had. Worked fine. Fast forward 3 mo. I hook to it today and got nothing. No trailer. I like my stuff to work when I need it to, and I really don't have the time for this crap every time I hook up. Anyone come up with a fix?

I've read several posts on different forums about this issue, but my sons 2014 sierra 1500, 5.3 is giving that code, and the Stabilitrac light comes on with it. Now get this. We took the air plenum off so we could inspect the throttle body, and when we cranked it up, with the plenum off, the code is gone and the miss is either gone or not nearly as noticeable. Can't smell raw gas anymore. Got mass air flow codes and several others but not the misfire code. Stabilitrac light is gone. Drove it a couple miles and it never threw that misfire code again. Put the plenum back on and it's back to P0305 and stabilitrac light. There are a lot of threads on this and most have resulted in replacing the throttle body, some times the TPS. What in the world is going on to make just #5 misfire? We replaced all the plug wires and the plugs, so that is ruled out. It needed it anyway. At idle the TPS is reading about 20%. Is that what it should be?

I'm a little late to the party on this, but my sons 2014 sierra 1500, 5.3 is giving that code, and the Stabilitrac light comes on with it. Now get this. We took the air plenum off so we could inspect the throttle body, and when we cranked it up, with the plenum off, the code is gone and the miss is either gone or not nearly as noticeable. Can't smell raw gas anymore. Got mass air flow codes and several others but not those. Stabilitrac is gone. Put the plenum back on and it's back to P0305 and stabilitrac. There are a lot of threads on this and most have resulted in replacing the throttle body, some times the TPS. What in the world is going on to make just #5 misfire?

I know this is an old post, but I'm having the same issues. 4 DTC's P0192; P0641: P127C: P2228 Besides the Baro sensor, APP sensor, and fuel rail psi sensor, are there any others on that "A" reference voltage circuit that i need to look into. I'm an electronic tech by trade so I'm familiar with these types of circuits, but i usually have good prints to work off of. GM is quite stingy with their info. 2015 GMC Sierra 1500