Brakes cause rumbling and jumping at approx 15000 miles.
Crankshaft position sensor replaced at approx 4000 miles.
Front left window regulator cable snapped at 20000 miles.
Front right window regulator cable snapped at 25000 miles.
Rear left window regulator cable snapped at 85000 miles.
Emergency brake cable snapped at 30000 miles.
Radiator fan and relay and cable replaced at 40000 miles.
Radiator fan relay replaced again at 85000 miles. Dealer improperly installed it per the service manual.
Turn signals work intermittently. Dealer claims it needs $1000 worth of repairs. The subsystem specified in their report does not appear to be related, so the verdict is that they don't know what they are doing and/or are bilking the customer.
Throttle valve position sensor replaced approx 70000 miles.
Vacuum system leaks reoccur and make good money for the dealers. Charged $135 to "diagnose" and replace a gas cap. Problem re-occurred after the OBDII computer had a chance to determine that it was not resolved. Questionable dealer service department.
Dealers in my area areas replace too many parts and don't get to the real cause of problems. At least one repair was performed using a shortcut and the part (fan relay) failed again -- most likely to to overheating because of improper installation.
The 2003 Jeep Grand Cherokee Laredo is a solid vehicle with a truck feel rather than a gooshy granny suspension. The automatic transmission appears to use actual clutch plates, which provides a rugged shift with some sacrifice of smooth shifting. Again, think truck.