One problem related to brake disc caliper has been reported for the 2006 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 GMC Sierra 1500 based on all problems reported for the 2006 Sierra 1500.
I purchased my pickup new in Jan. 2007 and use it to tow an 8x16 trailer w/electric brakes for a part time business throughout the summer. The trailer weighs approx. 6000 lbs. Loaded and the truck is rated for 8,000 lbs. Approximate towing mileage is 3 to 4,000 miles per year. After towing the trailer 200 miles on sept. 14, 2012 my wife noticed several oil leaks on the asphalt nearby. I suspected something in the differential area and drove to the nearest GMC dealership several miles away. They diagnosed it as a rear brake line and ended up replacing 6' of it along with both rotors and calipers and a brake system flush for a total of $958. 76. I'm 66 yrs. Old and have never had a brake line go in any vehicle I've ever owned and I've lived in massachusetts all my life. My local mechanic just told me this week that the rest of the brake lines are badly coroded and should be replaced ASAP. This will add another $900 to the entire cost. There is no question in my mind that gm has allowed quality in workmanship on its brake lines to fall through the cracks. . . And at the public's expense.