The engine hrs are stored in the cluster. For sure on the 14+ also whiteautoandmedia.com can reprogram the engine hrs. They offer that when you are getting a cluster programed by them.
Here's a few options. If the thermostat is the issue and you want to run a cooler temp and not have to do ecm tuning.
https://katechengines.com/i-30497645-katech-174-degree-gen-5-lt-thermostat.html
If you want to get away from this generation of thermostat you can get this housing and run the...
I'm pretty sure Rotella 15w-40 still has zinc in it. But I definitely agree there's no need to run it in the Tahoe or any modern gas engine for that matter.
The vent for the evap system could be plugged. As said above, newer vehicles don't have a cap unless it has the flex fuel option on it. Then it has a yellow cap Like you already have.
The NV4500 can for sure handle 400hp. That's what I put in my 91 gmc with 4.88 gears and 37's. If you do go with the NV4500 try and find the one from the mid/ late 90's, they used the same case for the gm and dodge trucks in the mid 90's
They didn't do away with the manual transmission till 06. I imagine you can get the parts from a pickup in those years. Or retrofit a tremic transmission in there if it's a 2wd.
You need to change the radio module and the hmi module out with ones from a newer vehicle also your gauge cluster needs reprogrammed for the steering wheel buttons to function. Or you can upgrade to the denali cluster. It's easier to just get everything from whiteautoandmedia.com they can...
In my experience it's any of these.
1.Bad ball joints
2. Broken sway bar link
3. The U- bolts that hold the lower control arm are loose
4. Bad cv joint binding up in the turn
I had repeat Offenses of the first 3
On my 2013 Sierra with leveling kit on it. I also ran the dog crap out of the truck...
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