2017 Chevrolet Silverado 2500

SOLVED my U029E with "Exhaust Fluid Service" and "Reduced Speed". For the past month I have been working on this issue on my 2017 Silverado 2500HD LT 6.6L. Tonight I purchased my 3rd NOX2 (downstream) sensor and IMMEDIATELY EVERYTHING WAS FIXED. So, what happened? Why did the previous 2 NOX sensors NOT work? A clue came from GM Parts Direct as the original part number was listed as "DISCONTINUED". Previously we had purchased 2 numbers matching NOX2 sensors 12676706. So why did these sensors not work when the one see image below immediately worked? CHEVY! They programmed out part number 12676706 from the computer and programmed in 12718676. 12718676 CURED OUR U029E and "Exhaust Fluid Service" and "Reduced Speed" issues. Companies are still selling NOX2 part number 12676706 because it was the original device DO NOT PURCHASE THE DISCONTINUED NOX2 SENSOR 12676706. INSTEAD PURCHASE THE 12718676 PART NUMBER.

2017 CHEVY SILVERADO 2500HD LT 6.6L It all started on June 15, 2024 with a TRAILER BRAKE CONTROLLER (chafing wire that was grounding and shorting against the frame and bumper) resulted in a barrage of issues. Our truck being down over a month and throwing (so far) 16 codes just on the first 2 scanners. It has also taken out the TPMS too. U0137 Trailer Brake Control Module P1050 Reductant Level Sensor P11DB NOX SENOR 1 U0076 CONTROL MODULE COMMUNICATION POWERTRAIN SENSOR U101E LOST COMMUNICATIONS WITH DEDUCTANT CONTROL MODULE U029D LOST COMMUNICATIONS WITH NOX SENSOR 1 U029E LOST COMMUNICATIONS WITH NOX SENSOR 2 U02A3 LOST COMMUNICTIONS WITH PARTICULATE MATTER SENSOR U18A2 LOST COMMUNICATIONS WITH FUEL PUMP P203C REDUCTANT LEVEL SENSOR CIRCUIT LOW P204C REDUCTANT PRESSURE SENSOR CIRCUIT LOW U029E LOST COMMUNICATION WITH NOX SENSOR 2 P20B9 REDUCTANT HEATER 1 CONTROL CIRCUIT OPEN P0307 CYLENDER 7 MISFIRE P1488 TP MOTOR CONTROL CIRCUIT P0097 INSTAKE AIR TEMPORATURE (IAT) SENSOR 2 Upon having an advanced system scan there was an ADDITIONAL 128 CODES. Most of the codes referring to voltage to high and voltage to low. The entire truck is shutting down electrically and we can only assume that this will result in one of two options. First is that the vehicle will catch fire because of the system wide KNOWN WIRE CHAFING electrical issues. Second is that the vehicle is totaled / junked since Chevy will neither recall the KNOWN issues and is too busy changing customers for FRAUDULENT repairs that their vehicles do not need. Take for example P0307 which Chevy wanted $165 for the diagnostic fee and over $650 to replace cylinder 7 injector along with time for the repairs (over $1,000) for a $14 KNOWN wire connector issue that Chevy is performing fraudulently. Chevy CANNOT continue to lock the center information screen. That information is vital to our driving.

Another day another code. P11DB (NOX upstream). Now I am at NOX downstream, NOX upstream, DEF pump, cylinder 7 wire connector, Trailer Brake Controller wire harness, temperature sensor, and a dozen chafing wire harnesses because they are pulled to tight, have extreme bends in them or are rubbing against the frame, bumper, etc. Chevy recommended that I replace the cylinder 7 injector which was not the issue. At this rate if I paid Chevy to diagnose and repair this vehicle I would easily be $5,000+ in repairs since Chevy wants to do cab-off maintenance on everything now. This is manufacturer defects and consumer fraud and NTHSA is not holding Chevy accountable for. My Dad has a 1978 Pinto that he can start up and run to town but my 2017 Silverado can't even leave the farm.

This is my 3rd complaint within 6 days. The entire electrical system in this 2017 Silverado 2500HD LT 6.6L appears to be committing suicide. First it was the Brake Controller Unit, Diesel Injector Connector (cylinder 7), P1050 DEF Level Sensor, U029E NOX Sensor Module 2 Communication Lost, U02A3 Lost Communication With Particulate Matter Sensor Module, and now P018B Code: Fuel Pressure Sensor "B". At what point will the manufacturer be held accountable for manufacturer defects on this vehicle (including the Dorman 603-009 Coolant Reservoir)? Every pump and sensor on the truck is failing within a week of the trailer brake controller failure? WHY is every wire harness on this vehicle (like so many others) failing? I cannot trust that I can even drive this vehicle without either STABILITRAC shutting it down or the defective wire harnesses catching fire.

Engine wiring harness failure on my 2017 Silverado 2500HD LT 6.6. This time it is the cylinder 7 connector which is a very common complaint by Chevy owners. The wiring harness was installed with wires that were to short for the rear cylinders causing them to fail prematurely. This connector is snapped into position forcing the wires to bend at a tight 90 degree angle. Chevy is trying to force owners to replace the entire wiring harness instead of replacing just the defective connectors (GM 19368140, ACD PT3739). This failure causes the engine to idle and operate so rough that it engages STABILITRAC and forces reduced power mode.

I was driving with my front and rear motoried window defrost on because its cold outside right now when I started smelling something burning. I turned down the defrost knob. I opened the driver side window to air our the smell when suddenly the rear motorized window defrost sparked up into flames while I was driving. It was in full on burning up in flames. I pulled over and luckily I was able to put out the fire. I have contacted GM because when I google this issue it states GM put out a recall on 2014-2019 Silverado HD trucks but upon speaking with a GM customer representative my truck there is no such recall on these trucks. I could have been killed or worse killed someone else on the road. I am considering getting a lawyer involved with this issue.

When transiting between airport and home in very remote area in subzero temps the DEF warning system suddenly came on limiting vehicle speed progressively. No services were available both at this time of day and in this very remote area. There needs to be some way to override this system in the case of potential life and death. There were no warnings that this system was going to activate, it simply came on. The system had plenty of fluid but it appears the DEF heater failed. A vehicle should have an override for life and safety matters. Vehicle is going to a diesel mechanic for service now.