The 2026 GMC Sierra 1500 has a base curb weight of 4,290 lbs for Regular Cab models with Standard Bed and a base payload capacity of 2,410 lbs. Curb weight is 4,359 lbs for Regular Cab with Long Bed, and payload increases a smidge as well at 2,441 lbs. Base curb weight is 4,596 lbs for Sierra 1500 Double Cab with Standard Bed, and base payload capacity comes out to 2,204 lbs. Sierra 1500’s Crew Cab with Short Bed has a curb weight of 4,614 lbs and payload of 2,286 lbs. Crew Cab with Standard Bed has a curb weight of 4,885 lbs and up to 2,315 lbs of payload capacity.

• Base Curb Weight (Regular Cab, Standard Bed): 4,290 lbs
• Base Curb Weight (Regular Cab, Long Bed): 4,359 lbs
• Base Curb Weight (Double Cab, Standard Bed): 4,596 lbs
• Base Curb Weight (Crew Cab, Short Bed): 4,614 lbs
• Base Curb Weight (Crew Cab, Standard Bed): 4,885 lbs

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The 2026 GMC Sierra 1500 has an overall length of 231.94 inches for Double Cab models with Standard Bed and a wheelbase of 147.44 inches. Sierra 1500’s Crew Cab with Short Bed has generally the same dimensions, including an overall length of 231.92 inches with a wheelbase of 147.44 inches. Crew Cab with Standard Bed has an overall length of 242.45 inches and a wheelbase of 157.04 inches. Sierra 1500 Regular Cab with Standard Bed has an overall length of 210.97 inches and a wheelbase of 126.49 inches. Regular Cab with Long Bed includes an overall length of 229.73 inches and a 139.56-inch wheelbase.

• (Double Cab, Standard Bed) Length, Overall: 231.94 in
• (Double Cab, Standard Bed) Wheelbase: 147.44 in
• (Crew Cab, Standard Bed) Length, Overall: 242.45 in
• (Crew Cab, Standard Bed) Wheelbase: 157.04 in
• (Crew Cab, Short Bed) Length, Overall: 231.92 in
• (Crew Cab, Short Bed) Wheelbase: 147.44 in
• (Regular Cab, Standard Bed) Length, Overall: 210.97 in
• (Regular Cab, Standard Bed) Wheelbase: 126.49 in
• (Regular Cab, Long Bed) Length, Overall: 229.73 in
• (Regular Cab, Long Bed) Wheelbase: 139.56 in

Finance Center

The 2026 GMC Sierra 1500 has a max width of 81.24 inches without the mirrors for Double Cab with Standard Bed and Crew Cab with Short Bed or Standard Bed. Overall vehicle width varies only slightly for Regular Cab models. For example, Sierra 1500 has a max width of 81.15 inches without mirrors for Regular Cab with Standard Bed or Long Bed. Sierra 1500 includes a cargo box width of 71.40 inches at the floor and a cargo box width of 50.63 inches at the wheelhousings.

• Width, Max w/o mirrors: 81.24 in (Double Cab and Crew Cab)
• Width, Max w/o mirrors: 81.15 in (Regular Cab)
• Cargo Box Width @ Floor: 71.40 in
• Cargo Box Width @ Wheelhousings: 50.63 in

New Inventory

The 2026 GMC Sierra 1500 has a 3-passenger capacity for Regular Cab models with the Standard Bed or Long Bed. The 2026 Sierra 1500 offers a 6-passenger capacity for Double Cab with Standard Bed or Crew Cab with Short Bed or Standard Bed. Inside, Sierra 1500 offers best-in-class front head- and legroom to make sure you have plenty of space to get comfortable, including 43.03 inches of front head room and 44.53 inches of front legroom. Most models offer 40.12 inches of second row head room and 43.40 inches of second legroom, while Double Cab includes 39.88 inches of head room and 35.24 inches of legroom in the second row.

• 3- or 6-passenger capacity
• Front head room: 43.03 in
• Front legroom: 44.53 in
• Second head room: 40.12 in
• Second legroom: 43.40 in

Used Inventory