By Ralph on
2006 GMC Sierra 1500 SLE2 4dr Extended Cab 6.5 ft. SB (5.3L 8cyl 4A)
It may be too soon to truly evaluate. As of now only 800 miles on it. The alternator whines. The dealer says this is normal with new pulsating alternators, there is a slight seat of your pant vibration at all speeds. Brakes pulse as if disc or drum is out of round. The overall ride is smooth and comfortable. Gas mileage is not bad for 5.3, average 16.4 city. It tows my boat as if it were not behind me. So far, so good! Just some kinks to be worked out.
Impressed with the smooth ride and towing capabilities. Not bad fuel economy either.
Rearview mirror is distracting with the air bag indicator always in your face. Alternator whines with a slight vibration while driving. If it's as good as GM says it is, then enhance your mediocre warranty.