2020 Silverado 1500 Custom 4.3L V6 - HELP

Titan2004 · September 22, 2020

New member and not sure if this post is in the correct section but I NEED HELP PLEASE!!!

I have a new '20 Silverado 4.3L V6. Love the truck. At 3300 miles it started to run rough with trouble shifting. Next day while driving light came on indicating "Reduced Engine Power". Kind of ironic coming from a V6 but whatever. Immediately took to dealer. They found codes P0106 (00) and P16F3 (00) as history codes. They found documents related to codes. Inspected wiring harness from ECM to MAP sensor, all good. Wiggled harness with engine running, all good. All inline connectors inspected. Test drove 100 miles, no issues found and truck was released. Dealer stated GM is aware of an issue but no fix available?

At 4800 miles the radio went black, then truck started running rough again. I had to intermittently put in neutral while driving since shifting was so erratic. Then radio and cluster went dark and truck completely shut down while driving. Put in neutral, coasted to side of road. Removed key and restarted. Truck went dark again and had to pull over. Started back up and immediately dropped off at dealer with CEL on. Got notification from GM that engine/transmission fault detected.

Dealer installed new manifold sensor and was ready to release back to me. No, I'm not convinced that sensor would cause gauge cluster and radio to go dark in addition to truck shutting down completely while driving.

Does anyone have any input or advice for me please? Brand new truck and I'm very frustrated with what is going on. Thank you

greco2003 · September 23, 2020

Sounds like something electrical bad connection, ground, battery. It has had 2 trips to dealer for same issue one more and you can Lemmon it.

bshort · September 23, 2020

You probably won't get any descent help from GM. Trade 'er in.

Titan2004 · September 23, 2020

Thanks for replies. Manifold sensor still tripped history code. They ordered new ECM. Got lucky and ran into tech. He said he'll try ECM but suspects its likely a wire rubbing somewhere and will have to trace it.

Lemon Law in PA is pretty clear and actually effective. Yes, they have one more visit after this one to fix or I get refund or replacement. Won't be easy or fun but I'm prepared if it comes to this.

If anyone else has had wiring issues on new Silverados please chime in. Thanks again