Sierra 1500 vs. 2500 HD vs. 3500 HD at a glance
All three are in stock at Brotherton Buick GMC. The half-ton Sierra 1500 starts lowest, and each step up adds towing and payload.
Sierra 1500
Sierra 2500 HD
Sierra 3500 HD
MSRP is the lowest among new 2026 trucks in our Renton inventory on October 5, 2026, including installed options, and excludes tax, title, license and dealer fees. Towing and payload are GMC’s maximum available ratings for 2026 and depend on cab, bed, engine and equipment.
Which Sierra do you need for your trailer?
Start with the loaded weight of what you tow. Each step up the ladder is the lightest Sierra that GMC rates for that weight.
9,400
lbs or less
Sierra 1500
With the standard 2.7L TurboMax engine.
13,300
lbs or less
Sierra 1500
With the available 3.0L Duramax turbo-diesel.
22,390
lbs or less
Sierra 2500 HD
The three-quarter-ton step for large fifth wheels and equipment trailers.
36,000
lbs or less
Sierra 3500 HD
The one-ton, at its maximum with the 6.6L Duramax.
These are maximum available ratings. The rating for a specific truck is on its trailering label and depends on its cab, bed, axle and hitch. Bring us your trailer’s weight and we’ll match it to a truck on the lot.
Sierra 1500 and Sierra HD engines compared
Torque is what moves a trailer. The Sierra HD’s 6.6L Duramax makes 975 lb-ft, nearly double the strongest Sierra 1500 engine.
Sierra 1500 Sierra HD Bars show torque.
Every Sierra HD uses an Allison 10-speed automatic. More on the diesel: Duramax diesel trucks in Renton.
Is a Sierra 2500 HD too big for daily driving around Seattle?
It is noticeably longer. A Crew Cab Sierra 1500 with the standard bed is about 20 feet long, while a Crew Cab Sierra 2500 HD with the long bed is about 22 feet 3 inches.
241.5 in
Sierra 1500 Crew Cab, standard bed
266.8 in
Sierra 2500 HD Crew Cab, long bed
96.6 in
Sierra 3500 HD width with dual rear wheels
That matters on the ferry. Washington State Ferries charges its standard vehicle fare under 22 feet, so the long-bed Crew Cab HD moves into the length-based fare, while the Sierra 1500 does not. It also matters in parking garages in Seattle and Bellevue and in a standard home garage.
If you tow a few weekends a year and drive to work the rest, the Sierra 1500 is the easier truck. If the trailer is your work, the HD earns its size.
How much do the Sierra 1500 and 2500 HD cost in Renton?
On our lot today, new 2026 Sierra 1500 trucks start at $56,395 MSRP and new 2026 Sierra 2500 HD trucks start at $60,625. Duramax-powered HD trucks start at $89,270.
Sierra 1500
2026 models, lowest MSRP by trim
Sierra 2500 HD
2026 models, lowest MSRP by trim
Sierra 3500 HD
2026 models, lowest MSRP by trim
Lowest MSRP by trim among new in-stock vehicles in our Renton inventory on October 5, 2026, including installed options. Excludes tax, title, license and dealer fees. Inventory changes daily, so check current listings and ask about offers.
What about the 2027 Sierra 1500?
GMC has announced a next-generation 2027 Sierra 1500, with the first trucks expected at dealerships before the end of 2026. It brings new engines, including a 5.7L V8 rated to tow up to 13,500 lbs. The 2026 Sierra 1500 trucks on this page are in stock now.
Should you buy a Sierra 1500 or a Sierra 2500 HD?
Buy the Sierra 1500 if you
- tow 13,300 lbs or less
- carry up to 2,230 lbs in the bed
- drive it every day and park in garages
- want the widest choice of trims on our lot
- want the lower starting price, from $56,395 in Renton
Buy the Sierra 2500 HD if you
- tow more than 13,300 lbs, up to 22,390 lbs
- pull a large fifth wheel or gooseneck trailer
- carry heavy loads, up to 4,049 lbs of payload
- want the 975 lb-ft Duramax and Allison 10-speed
- need more still: the Sierra 3500 HD tows up to 36,000 lbs
Where can you test drive a GMC Sierra near Seattle?
At Brotherton Buick GMC in Renton, just off I-405. Drive a Sierra 1500 and a Sierra 2500 HD back to back, and bring your trailer details.
Brotherton Buick GMC
215 SW 12th St, Renton, WA 98057
Sales: (425) 336-4655
Monday to Friday 9 am to 8 pm, Saturday 9 am to 7 pm, Sunday 11 am to 6 pm.
Schedule a test driveGet directionsWe serve truck buyers from Renton, Seattle, Bellevue, Kent, Tukwila, Burien, SeaTac, Newcastle, Maple Valley, Covington, Auburn, Federal Way and Des Moines. Have a truck to trade? Value your trade.
GMC Sierra 1500 and Sierra HD questions
What is the difference between the GMC Sierra 1500 and the Sierra 2500 HD?
The Sierra 1500 is a half-ton pickup that tows up to 13,300 lbs and carries up to 2,230 lbs of payload. The Sierra 2500 HD is a three-quarter-ton heavy-duty pickup that tows up to 22,390 lbs and carries up to 4,049 lbs, with a 6.6L gas V8 or a 6.6L Duramax turbo-diesel making 470 horsepower and 975 lb-ft of torque.
How much can a GMC Sierra 1500 tow?
The 2026 GMC Sierra 1500 has a maximum available towing capacity of 13,300 lbs with the 3.0L Duramax turbo-diesel. With the standard 2.7L TurboMax engine, the maximum available is 9,400 lbs. The rating for a specific truck depends on its cab, bed, axle and equipment.
How much can a GMC Sierra 2500 HD tow?
The 2026 GMC Sierra 2500 HD has a maximum available towing capacity of 22,390 lbs. The Sierra 3500 HD has a maximum available towing capacity of 36,000 lbs.
How much does a GMC Sierra 2500 HD cost in Renton?
At Brotherton Buick GMC in Renton, new 2026 Sierra 2500 HD trucks start at $60,625 MSRP for an SLE with the 6.6L gas V8, and Duramax diesel models start at $89,270, based on our inventory on October 5, 2026. New 2026 Sierra 1500 trucks start at $56,395. Prices include installed options and exclude tax, title, license and dealer fees.
Which Sierra engine has the most torque?
The 6.6L Duramax turbo-diesel V8 in the Sierra HD makes 470 horsepower and 975 lb-ft of torque. In the Sierra 1500, the 3.0L Duramax turbo-diesel makes the most torque at 495 lb-ft, and the 6.2L V8 makes the most horsepower at 420.
Does a GMC Sierra 2500 HD fit the standard Washington State Ferries fare?
It depends on the configuration. Washington State Ferries charges its standard vehicle fare for vehicles under 22 feet long. A Sierra 2500 HD Crew Cab with the long bed is 266.77 inches, about 22 feet 3 inches, so it falls into the length-based fare. A Sierra 1500 Crew Cab with the standard bed is 241.45 inches, about 20 feet 1 inch, which is under the limit. A trailer counts toward total length.
Where can I buy a GMC Sierra near Seattle?
Brotherton Buick GMC at 215 SW 12th St in Renton has new Sierra 1500, Sierra 2500 HD and Sierra 3500 HD trucks in stock. We are open Monday through Friday 9 am to 8 pm, Saturday 9 am to 7 pm and Sunday 11 am to 6 pm. Call (425) 336-4655 to schedule a test drive.
Sources: MSRPs are from new vehicles in our Renton inventory on October 5, 2026. Towing, payload, engine and size figures are GMC’s published figures: 2026 Sierra 1500, 2026 Sierra HD, Sierra truck sizes and GMC engines, retrieved October 2026. 2027 Sierra 1500 details: GMC newsroom. Ferry fare categories: Washington State Ferries. Maximum ratings require specific equipment. Confirm features, ratings and pricing with our team.