I have a '06 Tahoe 4x4 Z71...trying to pull a 20' metal car trailer..rear end dips way down..need advice..how to upgrade
We have two options for you that will both give your Tahoe extra support, the first and best is the Airlift 1000 airbag kit. This works in addition to your existing spring and shock and needs to be manually inflated, either with an onboard kit that we sell or an external air compressor (not hard to do, but some people don't want to reach under the truck every time they tow a large load.
The second option is the Monroe Loadeveler, which is a standard shock with a strong coil spring added to it. The Loadleveler installs in place of your factory rear shocks and never needs to be adjusted, but will give you harsher ride when the truck is empty.
You can see those here:
Airlift 1000 -
Air Lift 60769 Rear Air Lift 1000 Air Spring
Monroe Loadleveler -
Monroe 58639 Rear Load Adjusting Shock Absorber and Coil Spring Assembly