Doesn't hurt to try. It's my understanding that you have to run it at least 4 or 5 oil changes for things to get clean. Think about it, your engine didn't get dirty in just an oil change so over time it will slowly clean. It's the safest way to do it and not have seal issues.
I remember a product that came out a long time ago, AutoRX, it was an additive you put in the oil and then drove for 3k miles. Some saw improvements and some didn't. It was suggested to use a non synthetic with it at the time. Same observation, use a couple oil changes and give it time to work. It also stated it worked best if you could drive on trips to keep the oil hot. I'm sure if you ask AI it could tell you all about it.
The part # is 84520447, mine does not have the cooled seats but I'm willing to possibly change the cover and foam if needed.
I tried that site and a few others, added to cart and then paid. About an hout later I received a refund stating it has been discontinued.
Thought I would add to what Bruce answered, not only do the HD models use the torsion bar system, there are I believe 5 different torsion bar spring ratings that are all physically interchangeable with all the HD trucks going from a two wheel drive 2500 all the way up to the duramax or a gas engine truck with a snow plow prep package front end weight capacity that use the maximum sized torsion bar. It starts from a 4400 lb rated set in 400 lb increments up to 6000 lb. If one wants to fine tune the ride for a certain truck application they can swap out the torsion bars.
First off pay close attention to what Newdude pasted as he is a GM tech !.
I have a couple of questions which might cross off some questions others on this forum would be wondering about as well. So when was the engine oil changed prior to this trip, was it almost brand new oil or did it already have a fair bit of use on it before you started the trip.
Did you check the oil level on flat ground and was it at the full mark just before leaving on this trip which I gather from google map is about 700 miles or so. Why I ask and this is not the first time in history that has happened, that either a dealer or some other shop changed the oil on the vehicle and the vehicle left the shop and the owner ( you ) assumed the engine oil was full but in reality the person who changed the oil simply did not put enough oil into the engine .. it happens !. Also that a shop put the wrong viscosity oil in and an engine was not happy with that thinner viscosity and oil got past the rings at a higher rate than the proper viscosity. Not to mention if there was any leaking out of a drain plug or the filter gasket etc.
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