Also, after a few days of driving, I noticed a switch labeled with a pictograph showing a wheel going over a bump, next to the 4-wheel steering system's on/off switch at the dash's center. Hmmm, what's this? Although GM's Electronic Adjustable Ride control system is especially meant for firming up the suspension when towing or carrying heavy payloads, when activated the bouncing sensation was reduced considerably, but unfortunately so was the ride quality. 
The rather pricy $6,935 Quadrasteer option itself is a dream in a parking lot, but make sure the truck's 4-wheel drive system isn't engaged as tight turns become nothing less than ponderous. Fortunately the ease of the Autotrac automatic 4x4 system's dash-mounted button actuation makes swapping from 4WD HI to 2WD a non-issue, something I did regularly throughout my rather wet test week depending on the condition of road surfaces. But why does the 4-wheel steering system cost so much? Added to the package is a 4WS selector switch that allows you to turn off the feature, attractive roof marker lamps, HD trailering special equipment, a 130 amp alternator, fender flares on the pickup box, extended rear track width, power heated mirrors with integrated turn signals, hard tonneau cover and more. Incidentally, if 4WD isn't needed a 2WD 1500 HD Crew Cab is also available. Both models incorporate large, ventilated 4-wheel disc brakes with ABS and Dynamic Rear Proportioning. The brakes on my 4x4 test vehicle proved more than adequate during panic stops, even upon repeated use.