2021 GMC Sierra 1500 AT4 vs. Denali
iSeeCars' unbiased and data-driven comparison of the 2021 GMC Sierra 1500 AT4 and 2021 GMC Sierra 1500 Denali contrasts the two cars across a broad spectrum of vehicle specifications to determine which car is better. In addition to comparing pricing and specs, iSeeCars uses all the ratings, rankings, and insights from its comprehensive analyses of each vehicle model, including calculations of reliability, safety, depreciation, value retention, and the vehicle's projected lifetime recalls (based on analyzing over 25 billion data points). This in-depth evaluation is used to identify which vehicle represents a better overall choice for shoppers who are considering both the 2021 GMC Sierra 1500 AT4 and the 2021 GMC Sierra 1500 Denali.
When we compare the 2021 GMC Sierra 1500 AT4's and the 2021 GMC Sierra 1500 Denali's specifications and ratings, the 2021 GMC Sierra 1500 AT4 has the advantage in the area of typical lower range of pricing for used cars. The 2021 GMC Sierra 1500 AT4 and 2021 GMC Sierra 1500 Denali have the same fuel efficiency, overall quality score and base engine power. Based on this comparison of the 2021 GMC Sierra 1500 AT4's and the 2021 GMC Sierra 1500 Denali's specifications and ratings, the 2021 GMC Sierra 1500 AT4 is a better car than the 2021 GMC Sierra 1500 Denali.
Pricing: A used 2021 GMC Sierra 1500 AT4 ranges from $34,753 to $49,999 while a used 2021 GMC Sierra 1500 Denali is priced between $35,900 to $52,454.
Resale/Retained Value: Looking at the 5-year depreciation rate, the 2021 GMC Sierra 1500 AT4 and the 2021 GMC Sierra 1500 Denali both lose 42.1 percent of their value.
Quality Rating: The iSeeCars Overall Quality rating for the GMC Sierra 1500 is 8.0 out of 10. GMC Sierra 1500 is ranked 3 out of 10 Best Full-Size Trucks based on its reliability, retained value, and safety ratings.
Reliability Rating: iSeeCars' Reliability Rating for the GMC Sierra 1500 is 7.9 out of 10.
Engine Power and Fuel Efficiency Comparison: For engine performance, the base engine of both the 2021 GMC Sierra 1500 AT4 and the 2021 GMC Sierra 1500 Denali makes 355 horsepower. Both the AT4 and the Denali are rated to deliver an average of 17 miles per gallon, with highway ranges of 504 and 528 miles respectively. Both models use regular unleaded.
Available Cab Types and Bed Lengths: Both the 2021 GMC Sierra 1500 AT4 and the 2021 GMC Sierra 1500 Denali are available in Crew Cab configuration. Both the 2021 GMC Sierra 1500 AT4 and the 2021 GMC Sierra 1500 Denali offer bed lengths of 69.9, 79.4, and 98.2 inches.
Safety Ratings: The GMC Sierra 1500 has an average safety rating of 4.69 out of 5 Stars based on NHTSA's crash test ratings.
New Car Pricing
Asking Price:
-
Starting MSRP:
54700
Category Avg Starting MSRP:
(Full-Size Pickup Trucks)
33666
Category Starting MSRP Range:
(Full-Size Pickup Trucks)
29290 - 45430
New Car Pricing
Asking Price:
-
Starting MSRP:
55800
Category Avg Starting MSRP:
(Full-Size Pickup Trucks)
33666
Category Starting MSRP Range:
(Full-Size Pickup Trucks)
29290 - 45430
Used Car Pricing
Avg Used Car Price:
42582
Price Range:
34753 - 49999
Category Avg Price:
(Full-Size Pickup Trucks)
35718
Category Avg Price Range:
(Full-Size Pickup Trucks)
27297 - 41484
# Used Cars for Sale Nationally:
706
Avg Mileage of Used Cars for Sale:
86546
# Good or Great Deals:
419
Used Car Pricing
Avg Used Car Price:
44026
Price Range:
35900 - 52454
Category Avg Price:
(Full-Size Pickup Trucks)
35718
Category Avg Price Range:
(Full-Size Pickup Trucks)
27297 - 41484
# Used Cars for Sale Nationally:
490
Avg Mileage of Used Cars for Sale:
79860
# Good or Great Deals:
276
GMC Sierra 1500 Scores & Rankings
Overall Score:
8.0 / 10
Reliability:
7.9 / 10
Retained Value:
8.3 / 10
Safety:
7.7 / 10
GMC Sierra 1500 Scores & Rankings
Overall Score:
8.0 / 10
Reliability:
7.9 / 10
Retained Value:
8.3 / 10
Safety:
7.7 / 10
iSeeCars Reliability Insights for 2021 GMC Sierra 1500 AT4
Remaining Life Expectancy (years):
8.3
Typical Category Remaining Life Expectancy:
(Full-Size Pickup Trucks)
8.4
Category Remaining Life Expectancy Range:
(Full-Size Pickup Trucks)
6.6 - 11.4
Chance of Reaching 200k Miles for a New Car:
0.349
iSeeCars Reliability Insights for 2021 GMC Sierra 1500 Denali
Remaining Life Expectancy (years):
8.3
Typical Category Remaining Life Expectancy:
(Full-Size Pickup Trucks)
8.4
Category Remaining Life Expectancy Range:
(Full-Size Pickup Trucks)
6.6 - 11.4
Chance of Reaching 200k Miles for a New Car:
0.349
Expected 30-year Lifetime Recalls
Expected Lifetime Recalls:
5.666472708218369
Typical Category Recalls:
(Full-Size Pickup Trucks)
6.3
Category Range for Recalls:
(Full-Size Pickup Trucks)
1.5 - 30.2
Expected 30-year Lifetime Recalls
Expected Lifetime Recalls:
5.666472708218369
Typical Category Recalls:
(Full-Size Pickup Trucks)
6.3
Category Range for Recalls:
(Full-Size Pickup Trucks)
1.5 - 30.2
GMC Sierra 1500 Rankings
Ranking
1 out of / 10Ranking
1 out of / 10Ranking
1 out of / 4Ranking
2 out of / 10Ranking
2 out of / 10Ranking
2 out of / 10Ranking
2 out of / 4Ranking
3 out of / 10Ranking
3 out of / 10Ranking
3 out of / 10Ranking
3 out of / 10Ranking
3 out of / 5Ranking
3 out of / 5Ranking
5 out of / 10GMC Sierra 1500 Rankings
Ranking
1 out of / 10Ranking
1 out of / 10Ranking
1 out of / 4Ranking
2 out of / 10Ranking
2 out of / 10Ranking
2 out of / 10Ranking
2 out of / 4Ranking
3 out of / 10Ranking
3 out of / 10Ranking
3 out of / 10Ranking
3 out of / 10Ranking
3 out of / 5Ranking
3 out of / 5Ranking
5 out of / 10Available Body Styles
Pickup Truck
Available Body Styles
Pickup Truck
Available Cab Types
Crew Cab
Available Cab Types
Crew Cab
Available Bed Length(s)
69.9 inches, 79.4 inches, 98.2 inches
Available Bed Length(s)
69.9 inches, 79.4 inches, 98.2 inches
Available Drivetrain Options
Diesel, Gasoline
Available Drivetrain Options
Diesel, Gasoline
Other GMC Sierra 1500 Trim Levels
Base, Denali, Elevation, Elevation Standard, SLE, SLT
Other GMC Sierra 1500 Trim Levels
AT4, Base, Elevation, Elevation Standard, SLE, SLT
Warranty Information
Warranty, Bumper-to-Bumper:
3 years / 36000 miles
Warranty, Powertrain:
5 years / 100000 miles
Warranty, Roadside Assistance:
5 years / 60000 miles
Warranty Information
Warranty, Bumper-to-Bumper:
3 years / 36000 miles
Warranty, Powertrain:
5 years / 100000 miles
Warranty, Roadside Assistance:
5 years / 60000 miles
Safety Ratings
NHTSA Safety Rating (last 5 year average):
4.69 out of 5 Stars
2026 NHTSA Overall Rating:
4 out of 5 Stars
2026 NHTSA Front Crash Overall Rating:
4 out of 5 Stars
2026 NHTSA Side Crash Overall Rating:
5 out of 5 Stars
2026 NHTSA Rollover Rating:
4 out of 5 Stars
IIHS Safety Rating:
Not yet available
Safety Ratings
NHTSA Safety Rating (last 5 year average):
4.69 out of 5 Stars
2026 NHTSA Overall Rating:
4 out of 5 Stars
2026 NHTSA Front Crash Overall Rating:
4 out of 5 Stars
2026 NHTSA Side Crash Overall Rating:
5 out of 5 Stars
2026 NHTSA Rollover Rating:
4 out of 5 Stars
IIHS Safety Rating:
Not yet available
Base Drivetrain Specs
Horsepower:
355 hp @ 5600 rpm
Torque:
383 foot-lbs @ 4100 rpm
Power-to-Weight Ratio (higher is better):
0.069 hp per pound
Towing capacity:
9200 lbs
Max Payload:
2080 lbs
Base Drivetrain Specs
Horsepower:
355 hp @ 5600 rpm
Torque:
383 foot-lbs @ 4100 rpm
Power-to-Weight Ratio (higher is better):
0.074 hp per pound
Towing capacity:
9700 lbs
Max Payload:
2040 lbs
Engine Specifications
Engine Size:
5.3 liters
Engine Configuration:
V
Number of Cylinders:
8
Transmission:
Automatic
Standard/Optional Drivetrain Type:
4X4
EPA Fuel Economy
(City/Highway/Combined MPG):
15 / 21 / 17
Range (city/hwy):
360 / 504 miles
Recommended Fuel Type:
Regular Unleaded
Engine Specifications
Engine Size:
5.3 liters
Engine Configuration:
V
Number of Cylinders:
8
Transmission:
Automatic
Standard/Optional Drivetrain Type:
4X2 / 4X4
EPA Fuel Economy
(City/Highway/Combined MPG):
15 / 22 / 17
Range (city/hwy):
360 / 528 miles
Recommended Fuel Type:
Regular Unleaded
Standard/Optional Features
Alloy wheels:
Standard
Android Auto:
Standard
Apple CarPlay:
Standard
Bench Seats:
Standard
Bluetooth:
Standard
Cooled/Ventilated Seats:
Standard
Heated Seats
Standard
Heated Steering Wheel:
Standard
Keyless Entry:
Standard
Keyless Ignition:
Standard
Leather Upholstery:
Standard
Navigation System:
Standard
Power outlet:
Standard
Roadside assistance:
Standard
Satellite radio:
Standard
Trailer Hitch:
Standard
Voice Recognition:
Standard
Wifi:
Standard
Adaptive Cruise Control:
Available
Parking Sensors:
Available
Sunroof/Moonroof:
Available
Wireless Smartphone Charging:
Available
Air Suspension:
N/A
Automatic Parking:
N/A
Captain's seat:
N/A
Front Bench Seats:
N/A
Internet Radio:
N/A
Massage Seats:
N/A
Paddle Shifters:
N/A
Panoramic Sunroof/Moonroof
N/A
Power Lift Gate:
N/A
Quad Seats:
N/A
Roof Rack:
N/A
Standard/Optional Features
Alloy wheels:
Standard
Android Auto:
Standard
Apple CarPlay:
Standard
Bench Seats:
Standard
Bluetooth:
Standard
Cooled/Ventilated Seats:
Standard
Heated Seats
Standard
Heated Steering Wheel:
Standard
Keyless Entry:
Standard
Keyless Ignition:
Standard
Leather Upholstery:
Standard
Navigation System:
Standard
Power outlet:
Standard
Roadside assistance:
Standard
Satellite radio:
Standard
Trailer Hitch:
Standard
Voice Recognition:
Standard
Wifi:
Standard
Adaptive Cruise Control:
Available
Parking Sensors:
Standard
Sunroof/Moonroof:
Available
Wireless Smartphone Charging:
Standard
Air Suspension:
N/A
Automatic Parking:
N/A
Captain's seat:
N/A
Front Bench Seats:
N/A
Internet Radio:
N/A
Massage Seats:
N/A
Paddle Shifters:
N/A
Panoramic Sunroof/Moonroof
N/A
Power Lift Gate:
N/A
Quad Seats:
N/A
Roof Rack:
N/A
Safety Features
Backup camera:
Standard
Rear Seat Reminder:
Standard
360-Degree Camera:
N/A
Blind Spot Monitoring:
N/A
Driver Attention Monitoring:
N/A
Forward Collision Warning:
N/A
Lane Departure Warning:
N/A
Lane Keeping Assist:
N/A
Pedestrian Detection:
N/A
Rear Cross-Traffic Alert:
N/A
Safety Features
Backup camera:
Standard
Rear Seat Reminder:
Standard
360-Degree Camera:
N/A
Blind Spot Monitoring:
Standard
Driver Attention Monitoring:
N/A
Forward Collision Warning:
Standard
Lane Departure Warning:
N/A
Lane Keeping Assist:
N/A
Pedestrian Detection:
N/A
Rear Cross-Traffic Alert:
Standard
Interior Dimensions
Front Head Room:
43 inches
Front Leg Room:
44.5 inches
Front Shoulder Room:
66 inches
Rear Head Room:
40.1 inches
Rear Leg Room:
43.4 inches
Rear Shoulder Room:
65.2 inches
Cargo Space:
Not yet available
Overall Interior Volume:
Not yet available
Interior Dimensions
Front Head Room:
43 inches
Front Leg Room:
44.5 inches
Front Shoulder Room:
66 inches
Rear Head Room:
40.1 inches
Rear Leg Room:
43.4 inches
Rear Shoulder Room:
65.2 inches
Cargo Space:
Not yet available
Overall Interior Volume:
Not yet available
Exterior Dimensions
Curb Weight:
5140 lbs
Width:
81.2 inches
Height:
78.4 inches
Length:
231.7 inches
Wheelbase:
147.5 inches
Ground Clearance:
10.9 inches
Exterior Dimensions
Curb Weight:
4820 lbs
Width:
81.2 inches
Height:
75.5 inches
Length:
231.7 inches
Wheelbase:
147.4 inches
Ground Clearance:
7.9 inches
Standard Wheel/Tire Information
Wheel Size:
18.0 x 8.5 inches
Wheel Type:
aluminum alloy with painted accents
Tire Size:
265/65R18
Standard Wheel/Tire Information
Wheel Size:
20.0 x 9.0 inches
Wheel Type:
polished aluminum alloy
Tire Size:
275/60R20
