Bringing this thread back from the dead...
I hate the leather seats in my 1999 Suburban LT (the fancy ones with seat heaters that stop working within minutes of driving off the dealer lot). Regardless of how I adjust them, they create a pressure line right below my shoulder blades that absolutely wrecks my back for days if I spend more than a couple hours sitting in them.
15 years ago, I discovered GMT400 Escalade seats. Those OG Escalades were only in production for a couple of years, and not many of them were sold because they were really just gussied-up 4-door Tahoes. But OMG those seats are a huge step up from even the fanciest Chevy/GMC seats from the era. And they bolt right in, with a matching electrical connector. I had them in our 1998 K2500 F-code diesel since 2007 and we put over 330k miles on that before we retired it.
Today I remembered that I still had those seats, and I swapped them into the Suburban that's been destroying my back. WHAT A DIFFERENCE! They're supportive, comfortable and provide the perfect level of adjustment. Still can't get the seat heaters to work, but that's a minor inconvenience.
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Now if only I could find a fold-down center seat that bolts in so I can have a proper armrest...