Found it by doing a search.
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It also says it has a problem with the rear suspension. Probably the rear air bags or the compressor. It can be easily and cheaply fixed by replacing them with springs.
Says it's running despite that CEL. Could be something simple and in any case, should be repairable with proper diagnosis. However, the BIG problem looking closely at the hood is that it's rusted through. And they are made of unobtainium. The front bumper is also sagging which means the inner structure is letting go. That could be corrected but it is a common problem with these along with the rusting hoods so used ones won't likely be any better.
These trucks have absolutely nothing in common with its Swedish cousins except the funky center ignition switch and usually broken dash cup holder. It's a USA built GMT360 truck. Mechanical parts are interchangeable with the TB and Envoy. Almost all body parts are exclusive to this truck though.