GM uses diesels in south america in the S-truck chassis, maybe you could get one of those? This is why the Isuzu Hombre has the longer nose, for the front mount intercooler.

There was a 800 series Tahoe on ebay with a MB OM603 (Inline 6 turbo diesel) in it, but it had tranny problems cuz he was using the stock (gas) tranny so it wouldnt shift by itself.

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2002 VW Golf TDI-169,000 miles B20