Among the parts of your 1999 Jeep Grand Cherokee that requires proper maintenance is the cooling system, most particularly the GMB Water Pump. Even though your Jeep Grand Cherokee is designed with a high-quality water pump, after burning thousands of miles down the road, dirt, dust, and other contaminants could have already corroded its performance. And without the existence of an effective water pump, the engine will produce huge quantities of heat enough to damage it. Thus, making a painstaking check-up of the water pump prior to driving can save you a lot of money in replacements and repairs. If you are planning on a long trip, better check your water pump first to be certain that it will be capable of enduring the severe heat and stress along the way. Inspect that the pump is properly aligned with the drive pulleys. Be certain that the hoses are correctly fitted and sealed. Be aware of strange noises that would indicate problems with the hearing. If there is extreme vibration, then inspect on the internal parts to determine what makes the pulsations. Inspect the whole cooling system as much as possible and not just the water pump to be guarantee that everything is working correctly. If there are problems with the other parts of the cooling system, you better deal with it straight away. We have loads of high-quality replacement auto parts and accessories like GMB G3000-163085 available here in our shop. Just look for the part you want in our online catalog, it’s all that simple.