The only major problems I have experienced with the Jimmy has been electrical - had to replace ignition switch which caused "CHECK ENGINE" light to stay on and the transmission to shift erratic. I also had an over heating problem that required me to replace the Radiator pluseI had a minor transmission leak where the shift lever enters the transmission body.
The vehicle has an excellent FIRM ride, it is a truck and it rides like one. The rear entry (lift the window and lower the tailgate) provides for excellent hauling and access to the cargo area. The various storage compartment within the truck where GM attempted to utlize all the space.
The electrical system and cooling system should be revisited for potential imporvements.