Used 2018 GMC Sierra 3500 HD Double Cab SLT Pickup 4D 8 Ft
Pricing
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Values and Prices
Fair Purchase Price is determined by collecting thousands of actual consumer vehicle purchase prices, plus data from national vehicle registration databases and several other reliable third-party sources.
Estimated Values
Condition | Trade-In Value | Private Party Value | ||
|---|---|---|---|---|
Excellent | $30,410 | $35,910 | ||
Very Good | $29,510 | $34,910 | ||
Good | $28,610 | $33,810 | ||
Fair | $26,210 | $31,110 |
Estimated Trade-In Values for the 2018 GMC Sierra 3500 HD Double Cab SLT Pickup 4D 8 ft range from about $26,210 to $30,410 depending on vehicle condition. Estimated Private Party Values range from about $31,110 to $35,910 depending on vehicle condition. Valid for ZIP Code 77019 through 3/21/2026.
Specifications
Dimensions, Weights & Capacities
Curb Weight | 6708 lbs. | ||
|---|---|---|---|
Fuel Capacity | 36.0 gallons | ||
Front Head Room | 42.8 inches | ||
Front Leg Room | 45.3 inches | ||
Max Seating Capacity | 6 | ||
Minimum Ground Clearance | 8.8 inches | ||
Overall Length | 248.9 inches | ||
Front Shoulder Room | 64.8 inches | ||
Towing Capacity, Maximum | 13900 lbs. | ||
Turning Diameter | 53.1 feet | ||
Wheel Base | 158.1 inches | ||
Truck Bed Volume | 76 cu.ft. | ||
Bed Length | 8.00 feet | ||
Gross Vehicle Weight Rating (GVWR) | 11600 lbs. | ||
Payload Capacity | 4267 lbs. |
Exterior
Fog Lights | Available | ||
|---|---|---|---|
HID Headlights | Available | ||
Number of Doors | 4 doors | ||
Privacy Glass | Available |
Mechanical
Drivetrain | 4WD | ||
|---|---|---|---|
Transmission Type | Automatic | ||
6 speed | Available | ||
Recommended Fuel | Regular | ||
Hill Descent Control | Available | ||
Hill Start Assist | Available | ||
Parking Assist System | Available |
Performance
Horsepower | 360 @ 5400 RPM | ||
|---|---|---|---|
Torque | 380 @ 4200 rpm | ||
Engine | V8, Flex Fuel, 6.0 Liter |
Warranty
Basic | 3 years / 36000 miles | ||
|---|---|---|---|
Powertrain | 5 years / 60000 miles | ||
Corrosion | 6 years / 100000 miles |
2018 GMC Sierra 3500 HD Double Cab SLT Pickup 4D 8 ft Standard Features
2018 GMC Sierra 3500 HD Double Cab
KBB.com Review
Kbb.com Expert Rating
If your next heavy-duty pickup needs to be as sophisticated as it is competent, the 2018 GMC Sierra HD has the power and technology to tow and haul like a champ. Denali models offer unsurpassed levels of luxury, while the All Terrain X model is the most off-road-capable Sierra to date.
A number of half-tons now offer an oil-burner under the hood, including the Ram 1500 and Nissan Titan XD. The midsize Chevy Colorado and GMC Canyon are also options. If you need maximum towing, you’ll find better numbers from the heavy-duty F-Series and Ram trucks.
2018 GMC Sierra 3500 HD Double Cab
KBB.com Consumer Reviews
Consumer Rating
2018 GMC Sierra 3500 HD Double Cab SLT Pickup 4D 8 ft Safety
Safety Features & Technology
Compare to Similar Vehicles
 Used 2018 GMC Sierra 3500 HD Double Cab SLT Pickup 4D 8 ft |  New 2026 Nissan Frontier King Cab |  Used 2025 Honda Ridgeline |  New 2026 Toyota Tacoma XtraCab | ||
|---|---|---|---|---|---|
| Price | $36,800 | $33,845 | $33,600 | $33,840 | |
| KBB.com Rating | 4.0 | 4.0 | 4.3 | 4.8 | |
| Consumer Rating | 4.1 | 3.7 | 4.6 | 3.8 | |
| Fuel Economy | N/A | City 19/Hwy 24/Comb 21 MPG | City 18/Hwy 24/Comb 21 MPG | N/A | |
| Fuel Type | Flexible Fuel | Gas | Gas | Gas | |
| Safety Rating | N/A | N/A | 5.0 | N/A | |
| Seating Capacity | 6 | 4 | 5 | 2 | |
| Basic Warranty | 3 years or 36000 miles | 3 years or 36000 miles | 3 years or 36000 miles | 3 years or 36000 miles | |
| Horsepower | 360 @ 5400 RPM | 310 @ 6400 RPM | 280 @ 6000 RPM | 228 @ 6000 RPM | |
| Engine | V8, Flex Fuel, 6.0 Liter | V6, 3.8 Liter | V6, i-VTEC, 3.5 Liter | 4-Cyl, i-FORCE, Turbo, 2.4 Liter | |
| Drivetrain | 4WD | 2WD | AWD | 2WD |