I purchased these two 6 quart boxes of Mobil 1 Synthetic LV ATF HP for my 2018 GMC Sierra with the intent to change the fluid, but I never got a chance as I sold the truck in 2021. Both boxes have been in my garage ever since and are new and have not been opened. Asking $50 for local pickup/meet in the Western PA area. I can probably ship, but that would be at the buyer's expense.
Unfortunately the most I can speak to how everything was reassembled is that I have used Joe quite a bit and he's always proven knowledgable, capable and honest. As to individual things he did I just can't say. I do know that he was under a time crunch to get all of this done and personally if I were in that situation I know I would be more susceptible to making minor mistakes. Though he did tell me he took the truck on an extended test drive after buttoning everything up and it did not throw a code for him.
With everything I know about the situation and as a layman, if I had to hazard a guess I'd say there's a non-trivial chance something minor that was overlooked. I was kind of hoping to narrow it down to a smaller subset of possibilities so I could have a more useful conversation with him.
A DOD-delete cam did come with the kit and the pictures Joe provided of the job indicate it was installed.
To my knowledge all O2 sensors are OEM. I purchased the truck at 75k miles about a year ago and the sensors were never replaced under my ownership.
On the intake gaskets, I supplied the parts and I did specifically purchase and give Joe all new gaskets to install. Anything that was indicated to be one time use, I purchased a new one of and supplied to him.
Double trust, huh?
I hear ya.
Side note, one can get trust off the internet. I belong to a Pontiac message board such as this. I sold a complete running Pontiac 455 that I built in the late `80`s. Most won`t touch a complete engine. Especially an older one. The dude offered me $500 more than I was asking. He paid the truck freight to Lubbock TX. All I did was build a crate for it.
I told the dude he was ballsy. He says, "I trust you".
Lets throw the tune out the window for a second.
Was everything installed correctly during the delete? All of the injectors are plugged in? Intake gaskets were replaced with new ones? You did replace the stock cam with a DOD delete cam, correct?
Oxygen sensors. Do you have OEM sensors on the truck at all 4 locations? Are any of them aftermarket?
Texas Speed sells a DOD tuner as an option with their kit, but all it does is turn off AFM. Its states that its for use with the stock profile non DOD cams, and any other cams require proper tuning and not just DOD disabling.
So to me, that throws that part out the window, and you've got a sensor, electrical or mechanical cause for the P219B.
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