Overview & Reviews

For 2006, the Duramax diesel engine receives a host of power and refinement upgrades, as well as reduced emissions. The Allison automatic transmission is now a six-speed, and features a tap-shift range selection mode. The camper-style mirrors have been replaced by a folding and extending design with a built-in convex spotter glass. Trim levels and packaging have also been juggled.

• Multiple drivetrain configurations, substantial towing and hauling capacities, compliant ride quality.

• Interior design is showing its age, spotty build quality, cheap interior materials.

User Reviews:

Showing 1 through 6 of 6.00

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  A Truck that puts a smile on your face! - 2006 GMC Sierra 3500
  By don lewis - September 3 - 5:36 pm

  I have owned this truck since 2006 and now have 56000 miles on it. The Duramax/Allison combo outshines the rest. I have hauled volleyball teams, 15000lbs 5th wheel up the Cascades, to work everyday and a multiple runs crosscounty and I smile everytime I start this truck up. Do I have complaints? One, the roof liner fit and finish leaves alot to be desired :( I have drove the rest and this is hands down the best. A Quiet diesel that can smoke the tires. I laugh when the Toyota boys try to pull something heavy up the mountains, they just dont have it. It will be the last truck I own.

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  Great Truck - 2006 GMC Sierra 3500
  By rick - March 7 - 3:43 am

  Excellent drivability. This truck has more power than the comparable Ford or Dodge, better mileage, and is MUCH quieter! (Im a Dodge man) Mileage varies from 22 (cruise at 55mph, no load) to 12 (90mph with truck loaded and 14,000lb trailer). Plently of room in the cab and a full length bed too! Only problem with the truck is the moonroof has stuck open 3 times and lots of wind noise when open. The moonroof cover is designed more like a screen - the sun sure gets hot at an angle that directly shines on driver. The original tires had sidewall integrity problems at 55K. Goodyear great with warranty issues. The fuel gage takes a while to show that the tank is actually full (10min - 1hour).

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  My retirement truck that I love !! - 2006 GMC Sierra 3500
  By my86gmc - October 6 - 5:40 am

  Best truck I have ever owned, period. Not sure what these other bad reviews are about? I have had no major problems. This truck pulls my 5th wheel better than anything on the road. Many Diesel magazines have given this truck its best in class award, and for good reason. Its a very comfortable truck to drive and loves to be hot rodded around. Im at 45000 miles looking forward to many years of driving and towing with this. I added a Delco navigation unit plus a Delco 6 cd changer, it was well worth the price.

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  Best vehicle i have owned - 2006 GMC Sierra 3500
  By mark mcrae - October 26 - 7:26 am

  Bought deisel truck for camper and boat. this truck goes over mountain passes like the load isnt there, 15,000lbs. I bought an aftermarket engine program to increase performance, and with this chip I get 20mpg empty, 15mpg with boat or camper, 13mpg with boat and camper. Programer takes 5 minutes and allows me to program for specific loads or to put it back to stock settings, recommend this. There has not been 1 problem with truck and have already put on 12,000 miles in the first 4 months. Very happy customer.

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  A disaster - 2006 GMC Sierra 3500
  By MyGMCLemon - August 8 - 4:26 pm

  I am absoultely horrified that I have a brand new vehicle that actually just shuts itself off while I am driving. It has now been into the dealership twice with only 1200 miles on it. Since they can not get codes out of the computer they can not isolate the problem and fix it. This truck has been a nightmare. It has been to the dealership twice now for repair. I still do not have it back and they still can not figure out what is wrong.

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  2007 GMC 3500 carbon monoxide in cab. - 2006 GMC Sierra 3500
  By daveo08 - May 4 - 8:10 pm

  Having driven this truck only a short distance, 2400 miles, problems are already evident. The worst being a diagnosis, from a blood sample test, of carbon monoxide poisoning due to cab infilteration. This is caused by the missfiring of the injection electronics package and the poor cab fit and finish allowing the engine exhaust to get into the cab unless the recirculate mode is used on the heating system. Recirculate is defeated by the controller which will not allow the recirculate mode to be engaged except on max ac. The engine has very poor throttle response and smokes excessively under heavy acceleration. The engine has a propensity to consume oil.