If the faucet is turned off the wand should not dribble after a minute or so. A small amount of water should dribble when pressure is released by the vacuum breaker where the hose connects at the shower wall. If it is leaking more than this, the problem is in the faucet, not the wand.
The wand is supposed to dribble when the faucet is turned on and the thumb button is in the no flow position. This features is to let you know when the faucet is left on accidently. Leaving pressure on the shower wand hose for extended time might damage it.
2014 Silverado 1500 5.3L maximum trailering package (yes, I'm towing the 34')