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.

- Vinton, OH, USA

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.

- Vinton, OH, USA

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.

- Vinton, OH, USA

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.

- Vinton, OH, USA

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.

- Vinton, OH, USA

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.

- Sunbright, TN, USA

The contact owns a 2017 Chevrolet Silverado. The contact stated that while driving at various speeds, the vehicle shut off and the entire instrument panel started flickering. In addition, the wheel would independently turn itself. The ABS warning light was illuminated. The vehicle was towed to a lot. The vehicle had not been diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure and confirmed that the vehicle was not included in a recall. The failure mileage was approximately 70,000.

- Ortonville, MI, USA

The engine glow plugs keep failing, I have replaced 4 already and 2 more are now failed. The vehicle only has 66K miles on it currently and the failures started around 50K. I do not understand why this hasn't been recalled like the 2018 trucks, they share the exact same engine.

- Collinsville, OK, USA

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.

- Kasilof, AK, USA

I recently began getting -??service trailer brakes-?? on my screen. This only occurs when towing trailers and not a single trailer. These trailer do not cause the alarm on similar vehicles either. I took it to the shop who didn-??t look at my vehicle for a week. During this time my cell booster was plugged in the whole time, which drained the battery. The tech called and said it was a low voltage issue. I told him to disconnect the cell booster and charge the battery. He did and no more low voltage. Then he stated that there was no problem with the trailer brakes. I asked how that system was tested and he said they didn-??t ave a way to test it. Hmmm. There are number of these complaints all over the internet with the same -??code-?? and GM is not able to, and unwilling to diagnose it and correct it.

- Carlsbad, NM, USA

I went to push the button for side mirror and rear window defrost and my daughter was in back seat said she smelled something and heard a buzzing noise. I didnt know what it was until today and I realized my rear defrost is not working but the mirrors do.

- Toronto, OH, USA

I received a recall notice #N182206311-04: Safety recall - diesel engine block heater cord. The notice says that I need to get the cord and heater replaced with part number 19419326 as I risk an electrical short damaging engine components or an engine compartment fire. I do not want to risk that. I first received the notice in January, 2020. I was told then that the parts are on back order and that they would call me when they get the part in. No return call. I had another recall notice since and took it in to the Chevy dealer today and was reminded of the prior recall notice regarding the block heater. I asked to have it replaced per recall notice. The dealership in henderson, nv can't get the part because GM will not ship it to Nevada. I called GM today, 4/16/20, and spoke to [xxx], and then to her supervisor, [xxx]. I explained that my wife and I are retired and drive this vehicle in states and areas that are extremely cold, I.e., we have a cabin at panguitch lake, ut (mountain lake) where winter temps. Get below zero. We go there every month, year round. We go to Idaho to visit children where temps approach single digits. I go hunting in Nevada and Colorado mountains where temps. Get below zero (I use a generator to provide the power to heat the engine block). I need to have this recall problem taken care of for the safety of my truck, myself and family, and others who may be in close proximity to me should a problem flare up while driving. [xxx], a supervisor at GM, is adamant that I will not be able to get a new engine heater cord and heater. I was told it's their policy to only send units/parts to cold weather states. So if I lived in reno, nv where wintertime temps. Are consistently below 20 degrees, I would not get an engine block replacement heater and cord. I paid to have a working engine block heater and cord when I bought the truck. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Henderson, NV, USA

The contact owns a 2017 Chevrolet Silverado 1500. The contact stated that the air conditioner blew hot air when turned on. The vehicle was taken to the Chevrolet of boise located at (12300 w fairview ave, boise, id 83713), where it was diagnosed that the condenser was cracked. The dealer stated that it was a recurring failure from 2015 and 2016 models. The manufacturer was made aware of the failure and provided a case number. The dealer also stated that the forward drive engagement switch should not be left on auto, to avoid automatic switch from two to four drive. The vehicle was not repaired. The failure mileage was approximately 81,000.

- Boise, ID, USA

Transmission shifts hard into gear when slowing down and extremely hard when towing 2,000lb empty trailer, currently at dealership to have new torque converter and pump installed. Dealership stated no metal shavings in transmission they believe. When accelerating engine rpms increase while vehicle speed decreases. Stereo constantly disconnects from wifi when streaming music. Wifi will continue to work for other devices. Voice commands work 80%ish of the time.

- Chesapeake, VA, USA

As I was driving on a city street high speed limit all the sudden all the warning dash lights came on although the engine is running, I didn't understand it tried to slow down and had to apply a lot of pressure to the brake pedal. I did not understand it. When I stopped the lights went out. I turned off the vehicle with the key and started it again. A couple days later I remotely started my vehicle but when I got in and turn the key on the lights did not go off immediately as they normally do.

- Crestline, CA, USA

Feb 5th 2019 my truck was parked in my driveway and the blockheater eas plugged into my electrical outlet on my garage and at 1:00 a.M. I was awakened to a loud explosion. When I finally figured out the cause my truck and garage were on fire. 3 months later found out GM had recalled almost 400,000 trucks my same year, make and model due to engineblock heater cords shorting out apparently. I have yet to receive a notice on my truck. The accident was a total loss and there was damage done to my garage. ## VIN passed ## Chevy Silverado 2500 hd 2017 ##

- Havre, MT, USA

Describe what happened - insd arrived at work and plugged in his block heater as he always does during the winter. Insd then went into work at about 6:30pm. At approx 7:30pm insd was notified that there was a fire in his truck, fire dept was called. Did the fire burn to the interior, extent of damage- total burn, full interior, engine bay. Fire is not sure where the fire started but thinks it was in the engine bay. The fire started in the engine compartment did the fire cause damage to anyone else's property- Ford F150 nathan alvarado damage: Whole passenger side (wheels, tires, paint front fender, mirror), Dodge ram2500 doug shelton damages: Headlights driver side, fender, bumper. All 3 cars parked in a row in angled parking allstate claim 0487873291 cody shipley registered owner

- Bothell, WA, USA

The ambient temperature sensor doesn't work. It does not read the correct temperature outside. This impacts the A/C, which does not work properly when the sensor is not reading the correct external temperature. The fairfield Chevrolet service department refuses to acknowledge the issue, let alone fix or replace the sensor. I use my truck on ranches and logging properties where it is literally impossible for me to drive over 20mph for 5 minutes. And when it is 105 degrees and the A/C thinks it is only 65 outside, the A/C does not engage. The service department keeps telling me that they cannot replicate the problem so it must not be real. This is the equivalent of calling me a liar in order to avoid honoring the warranty.

- Richmond, CA, USA

Interior driver side front driver window button not always working. At times when this happens the door ajar is lit, while the door may be shut, it doesn't latch completely. This happens when the vehicle is in motion or in park. This causes the interior lamps to stay on and drain out the battery. I did have it serviced under warranty. Problem was solved, until today 08/10/2018.

- Granite City, IL, USA

When driving at night and shifting into reverse the tailgate camera activates on the dash display at full brightness effectively blinding the driver from seeing anything/any person outside the vehicle as he tries to back up. There is no way to disable or dim the touchscreen during reversing.

- Hedgesville, WV, USA