Aftermarket brands include Alliance, FleetCharge , Quaker State Antifreeze. These coolants may be used in virtually any vehicle. Almost every truck and coach manufacturer in North America uses them as factory-fill. Make sure you are using acceptable quality water. Yes, this requires a lab test.
Most cities water is acceptable, but purified water is better.
Well water is not usually acceptable. Hard water scale and other chemicals used to make good drinking water don t always contribute to good coolant make-up water. These are the best coolants to use. The antifreeze was formulated with this ratio as the standard when the calculations were made for inhibitor concentrations. A few high-end coolant recyclers offer these services.