Overview & Reviews

The Sierra gets a revised look this year that includes a new front fascia, revised side moldings and an additional wheel design. Top-of-the-line models get power-folding heated mirrors with puddle lamps and turn signal indicators. Inside, the Sierra now offers a Bose stereo system and XM Satellite Radio. The instrument panel and center console have been redesigned, and GMC has added new seats, a more comprehensive driver information center, optional satellite steering wheel controls and a dual-zone climate control system. For increased safety, Sierras now feature a standard front-passenger-sensing system and dual-stage airbags. All 4.3-liter V6-equipped Sierras and California-emission V8s are now ULEV certified, while electronic throttle control is now standard on all V8 engines. Finally, the Autotrac four-wheel-drive system has been modified for less intrusiveness at low speeds, and the brake system received upgrades that provide better pedal feel and improved overall performance.

• Roomy extended-cab models, strong V8 engines, innovative features.

• Spotty fit-and-finish concerns, low-grade interior materials.

User Reviews:

Showing 41 through 50 of 65.00

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  Best vehicle I have ever owned - 2003 GMC Sierra 1500
  By Michigan Bill - July 27 - 1:16 am

  I bought this truck new and have enjoyed over 3 1/2 years of trouble free utility. Ive hauled, towed, 4- wheeled, pulled, and just plain driven this truck to great delight and it has met or exceeded expectations all around. Mileage is better than most others trucks averaging 17-18 MPG even with 5.3L, 4WD, SLT luxury package, hard tonneau, running boards, Z71 off- road pkg, and more. Going GMC gives a hiher level of luxury and customer care than you get from Chevrolet. The seat and mirror memory is very useful for getting kids in and out of the back seat. I use the exit position button to bring seat forward enough so they can enter and exit the back easily.

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  03 GMC Z71 REVIEW - 2003 GMC Sierra 1500
  By 03 Z71 - April 12 - 2:00 am

  It has had too many problems for a truck that costs as much as it does, with only 6000miles. First the tailgate had to be replaced b/c it had holes in it, not sure from what. Next the mirror display(comp.& temp.)went out, had to be replaced, then I found that the passenger side a/c gets stuck on hot when you turn it all the way up, still working on it, now the front axle housing is leaking oil. This truck has never been in the mud, or ragged. What a waste of my time and money, I will never buy again or recomend a GMC product to anyone.

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  GMC - They are professional grade! - 2003 GMC Sierra 1500
  By fireman bill - February 28 - 2:00 am

  I have the quad door, with the 5.3 engine, and I love it. The Bose stereo rocks, its a nice looking rig, pulls my 21 boat with ease. Im 44 years old, and this is the finest truck Ive ever owned.

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  WAS FORD DRIVER FOR 15 YEARS - 2003 GMC Sierra 1500
  By RAD1959 - January 6 - 10:00 am

  I have been a loyal Ford man for 15 years. I shopped around this time, great incentives abound. The Sierra was so damn solid and quite, I could stop thinking about it. Fords windnoise was the convincer. GMC is a great drive, quiet truck, super performer and looks great too. Sign me, A Ford Use To Be.......

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  What a truck should be. - 2003 GMC Sierra 1500
  By GTJ - December 13 - 10:00 am

  Overall, an excellent truck. Very quiet and plush on long trips. Excellent truck-like ergonomics, unlike the car- like feel and look of other manufacturers. Great audio (Bose) and Automatic climate controls. My wife and I share time behind the wheel so the seat and mirror memory is great to have. Very solid build quality, which translates into a quite, squeak (silicon lube on the weather striping) and rattle free ride. Front suspension is on the soft side in comparison to the rear. Only evident at slow speed at "bumps" perpendicular to the direction of travel, otherwise a very nice balance.

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  Silervado to GMC - 2003 GMC Sierra 1500
  By wrench1 - July 4 - 7:10 am

  Traded in a 2002 Silverado for this 2003 Sierra. Got the color and options that I really wanted, plus improved performance with 2003 trucks. Build quality was poor with lots of visits to dealer for minor warranty repairs, but now the truck has been terrific. Looking now to downsize for a smaller truckk with almost same towing for fish/ski boat. Fuel mileage has been 21-23 with 5.3L and 3.42 rear, synthetic oil, tires pumped up to 44 lbs always.

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  Averaging one repair a year - 2003 GMC Sierra 1500
  By irishlager - March 27 - 7:36 pm

  This is poor quality truck. In five years I have had five repairs and one recall. My repairs have included a cracked transmission case, bad steering mid-shaft, bad seatbelt, bad water pump, and bad wiper switch. In addition, I am currently losing lights in my dash and have lost most of my fan. GM likes to advertise this as professional grade. However, no professional in his right mind should buy this truck. Please save yourself and buy something else.

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  2003 GMC 1500HD - 2003 GMC Sierra 1500
  By GM 1500HD - December 20 - 2:50 pm

  Great truck, only 1 issue. With a little over a thousand miles, sounded like loose sheet metal under the truck. Ended up going back to the dealer 6 times before I went to another dealer. Found out it was the A/C compressor. Mechanic stated that it would build up too much pressure. Thank goodness I didnt put it off. Over $2500 in parts & labor. Not a single problem since. For such a big truck, get wonderful gas mileage. Only one thing I would change... get better viewing side mirrors. Lots of blind spots with the OEM mirrors.

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  Love my truck... so far - 2003 GMC Sierra 1500
  By Jim Talley - November 4 - 2:00 am

  In January I bought a 2003 GMC Sierra 1500 SLE with the trailering package and the Z71 off-road package. The truck is quite as a church mouse on the inside and runs beautifully. The ride is firm, like a truck, but not so stiff that you have to visit your dentist and have your fillings put back in weekly. Visability is very good and the inside is extremely comfortable (including the back seat). Transmission shift isnt always smooth as GM silk and there is some growl from the front end in 4WD... time will tell if these are normal or not.

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  So far So Good - 2003 GMC Sierra 1500
  By Joe - November 2 - 10:26 pm

  Bought used for 10,500. Low miles 56k. My first real truck. I didnt want to afford a Tundra so this fell in my exact range of price. Drives like a truck and runs like a truck. Its been strong for the couple months of ownership. The seatbelt squeked but some wd-40 after taking off the plastic clip cleaned it right up. BEWARE of installing aftermarket cd players in here. I had to pay 120 dollars for a wire harness do my air bags and door chime worked! The truck is roomy and fits side and rear passengers very well. The spare tire holder under the truck wont work but hey, for the price could not beat it. Looking forward to 4wd this winter and owning a nice big truck.