I've got someone wanting to trade for my Mercedes 300 S class diesel. They want to trade an '04 Buick Ranier. It has the 4.2 inline 6 cylinder. I know the car is basically a Buick version of the Tahoe. If it was the 4.3 V-6 I'd pass as the intake and fuel system problems they had are more than I want to fight. How good is this drivetrain and the vehicle overall. It's a bit battered but I want something to drive if we have a bad winter with lots of snow.