The Suburban is great the 2026 is good except for the wind noise and rattles I had a 2024 RST 3.0 no rattles or wind noise the 2015 Suburban was also great. Just tired of trying to get this problem fixed. MY 2016 Silverado was great the 2008 Suburban was great the 2004 GM SLT was great.
I had a 1970 Javelin MDS SST 390 4 speed with the go pack. It was a bullet for its time. A guy a work with a 72 GTX called it a rambler. After a chance meeting at a traffic light. He said no more. It was during my stupid time when I traded often. I traded it for a 67 California special Mustang.
I know from past four wheel drive vehicles and if not using the front axle that much with power flowing through it, the oil tends to stay very clean ( certainly after the initial wear and oil change ). The rear is often very different though just because its being worked all the time but would depend how hard the vehicle gets worked and todays synthetic oils stay cleaner longer vs the regular oil that breaks down quicker.
The High Country automatically comes with the 4 auto/high/low transfer case where as I think the LTZ can be had with ether transfer case. The idea seems nice and yes it does indeed work good but long term reliability with a lot of use of that feature while on icy roads causing it to work the crap out of those clutches is definitely questionable so I had been told by a local tranny shop.
Fortunately it sounds like the 6L90 trans in the gas truck can have the pan dropped without some major ordeal with the exhaust system, that is a real downside of the L8T with the 10 speed due to the exhaust routing vs the Duramax to service the transmission.
I put the rears on yesterday morning. I think the old wheels look good despite being 12 years old, and a little crusty. Re-torqued the fronts after 10-15 miles after I put on the rears. Re-torqued the rears today after about 30 miles or so yesterday. I've ordered what I believe are GM 13542523 TPMS sensors/valves from Partzilla. My googling/research on this part has again been, not clear. My manual for the new truck does not appear to show a manual TPMS relearn mode. I have an older device that appears to be exacly the same as what still sells now for putting on new wheels, or even rotating. I used to use it twice a year. I was impressed that I was able to use it to calibrate the originals wheels/tires I put on before trading it in a couple weeks ago.
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