2003 GMC Sierra 3500 Review | Edmunds.com

2003 GMC Sierra 3500

Certified Pre-Owned (CPO) is a category of used car. Often late-model vehicles, they have been inspected, refurbished, if necessary, and are under warranty by the manufacturer.
GMC Sierra 3500 Features and Specs

Features & Specs

  • Engine 6.0 L V 8-cylinder
  • Drivetrain Four Wheel Drive
  • Transmission 5-speed Manual
  • Horse Power 300 hp @ 4400 rpm
  • Fuel Economy 0/0 mpg
  • Bluetooth No
  • Navigation No
  • Heated Seats No

Review of the 2003 GMC Sierra 3500

  • One of the biggest, most powerful pickups you can drive without going to trucking school.

  • Safety
  • Pros

    Powerful drivetrains, roomy interiors, numerous available amenities.

  • Cons

    Spotty build quality, cheap interior materials.

  • What's New for 2003

    The Sierra gets a revised look this year that includes a new front fascia, revised side moldings and optional multifunction, fold-away mirrors. On the inside, GMC has added new seats, a more comprehensive driver information center, a redesigned instrument panel and optional dual-zone climate control and satellite steering wheel controls. On the hardware side, the standard 6.0-liter V8 gets electronic throttle control as well as the ability to run exclusively on compressed natural gas (CNG) or a mix of CNG and gasoline. Other upgrades include an improved Insta-Trac part-time four-wheel-drive system for reduced service costs, a more efficient starter for the 8.1-liter V8 and a revised headlight switch that allows drivers to turn off the daytime running lamps.

Full 2003 GMC Sierra 3500 Review

What's New for 2003

The Sierra gets a revised look this year that includes a new front fascia, revised side moldings and optional multifunction, fold-away mirrors. On the inside, GMC has added new seats, a more comprehensive driver information center, a redesigned instrument panel and optional dual-zone climate control and satellite steering wheel controls. On the hardware side, the standard 6.0-liter V8 gets electronic throttle control as well as the ability to run exclusively on compressed natural gas (CNG) or a mix of CNG and gasoline. Other upgrades include an improved Insta-Trac part-time four-wheel-drive system for reduced service costs, a more efficient starter for the 8.1-liter V8 and a revised headlight switch that allows drivers to turn off the daytime running lamps.

What Others Are Saying

Customer Reviews



Great truck

by on
Vehicle: 2003 GMC Sierra 3500 4dr Crew Cab 4WD LB DRW (6.0L 8cyl 4A)

Hauling hay and horses has never been so easy, power to spare, better on fuel mileage that I would have though. Pulling a small 2-horse slant load trailer with two 1200 lb. horses or a twenty-foot trailer loaded with three round bails of hay, I get an average of 18 miles per gallon. Without pulling, I get between 21 and 25 miles per Gallon. (Highway)




What can you say....?

by on
Vehicle: 2003 GMC Sierra 3500 4dr Crew Cab SLE Rwd LB DRW (6.0L 8cyl 4A)

Extremely Satisfied with Fllet Manager Diane Ford, Ironic working for GM with that Name. Excellent Truck! 230K MILES On the Last One and going for 430k On the Duramax/Allison Combonation.




Shoulda kept my ford

by on
Vehicle: 2003 GMC Sierra 3500 4dr Extended Cab 4WD LB DRW (6.0L 8cyl 4A)

Truck looks great! Fuel mileage (non towing) is not bad for a ton dually at 13 mpg. Towing is another story. Six (6) miles per gallon is the average for this 6.0L engine. Tow mileage is terrible and the truck is at its maximum performance on the interstate at 70mph. It absolutely has no power left.




Proffessional truck!!!!

by on
Vehicle: 2003 GMC Sierra 3500 4dr Crew Cab 4WD LB DRW (6.0L 8cyl 4A)

I love the tramendous performance of my sierra at a ropping 325hp and 370foot lbs. of tourque.I also love the way it steers with my camper hooeked to the back,anyone who likes trucks should deffinetly at least check it out.



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Gas Mileage

EPA-Rated MPG

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  • cty
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  • Not Available
  • highway
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