In this thread https://www.duramaxforum.com/forum/g...80178-wow.html
I was praising my new-to-me Duramax Silverado.
In another post in my history somewhere, I also mentioned where the only vehicle to ever leave my family and I stranded, was a GM...well, it happened again.
Two weeks ago, we towed our trailer through the Canyon, without a hiccup. On the Sunday of that weekend, we towed it further because we would be visiting some friends of ours the following weekend (this weekend just past). We dropped the trailer at their property and went home; it was after that ride home that I extolled the beauty and power of my new truck.
On Friday, June 1st we left home just after 5:00 pm. There were four of us in the truck...no trailer...and maybe 200 # of food, clothing and gear in the back. We were doing just fine along the lower stretches...about 65 or 70 mph with the Cruise Control engaged and I meant to place it into Tow/Haul mode before getting to the snowshed, but forgot.
When we hit the snowshed, the Engine light came on and she started to push a lot of black smoke. I made it to the exit a few miles further along and checked under the hood for anything obvious but couldn't find anything obvious.
I looked through the glovebox manual and it said that if the light is on steady, it is an EMISSION CONTROL issue, so seeing nothing obvious, I figured it might be the EGR valve got stuck or something along those lines....anything to do with EMISSIONS shouldn't be a big deal.
We carried on...every time I would exceed 1800 RPM, she would push black smoke, so I stayed light on the foot.
When we arrived to our destination, our friend had his code-reader with him (I forgot mine at home....along with ALL my tools!!!) and we discovered a P0299 Turbocharger underboost condition.
We cleared the code, thinking it might "reset" whatever set it off in the first place, but when we drove to town the following day, she still smoked if I exceeded 1800 RPM under load (going uphill).
When it came time to leave today, we hooked the trailer back up and started on our return journey home. We got 2 miles from their place when the ENGINE light came on again, and I assumed it was the same issue.
I took it VERY easily along the highway, doing my best to be as gentle as possible...but she still smoked like a locomotive whenever any pedal is applied. We got past the turnoff and started climbing another hill. As the engine speed dropped I put a bit more foot into it to get her to downshift and she just died.
I couldn't get over 2000 RPM out of her and as many MPH's as that engine speed will give. I assumed she had gone into Limp mode
but there was no indication anywhere that this had happened.
We came to a stop at a trucker's brake check, and called BCAA to get us a tow truck....for the truck, our RV and 4 adults.....we waited about 3 hours before the truck arrived and he drove us all the way home, with all of our gear and stuff.
When home, I connected my Reader and discovered that along with the P0299 underboost condition....I now also have a P0087 fuel rail/system pressure too low bank 1
alarm as well.
So....how much/what am I looking at to repair all of this....will this happen every time we encounter a hill....and more importantly, should I cancel the sale of my Powerstroke?
Sorry for that last one....but surely you can imagine how pi$$ed I am, forsaking a vehicle that was rock-steady and reliable, for this one that $hit the bed the second time I used it.