I have a 95 Islander that I tow 90 miles 2 times per year with an 04 1500 Silverado extended cab. When I hook up the trailer, the truck drops about 2 inches and it is very bouncy. For the sum of $120 a pair, I installed Monroe SensaTrac shocks. It has a coil in addition to the shock to increase load capacity by 1000 lbs. What a difference when I hook up the trailer now. The truck is level and the ride is much improved. Probably more noticeable due to the 77K mile old shocks removed but the ride is remarkable. I am more than happy with this set up. It does not effect the ride without a load as well. I just wanted to pass along a very reasonable improvement for towing near the max.