2021 GMC Sierra 1500 Regular Cab
The 2021 GMC Sierra 1500 Regular Cab is a 285-hp pickup truck with a 6l80 six-speed automatic / 8l90 eight-speed automatic / 10l80 ten-speed automatic and four-wheel drive.
| Spec | Value |
|---|---|
| Engine | |
| Engine Type | 4.3L V-6 VVT DI with Active Fuel Management (std); 5.3L V-8 VVT DI with Active Fuel Management (opt); cast aluminum block and heads |
| Horsepower | 285 hp @ 5,300 rpm |
| Torque | 305 lb-ft @ 3900 rpm (4.3L SAE) / 383 lb-ft @ 4100 rpm (5.3L SAE) rpm |
| Valvetrain | OHV, 2 valves/cyl, VVT with Active Fuel Management |
| Bore and Stroke | 99.6 x 92.0 (4.3L) / 96.0 x 92.0 (5.3L) |
| Injection Type | Direct high-pressure fuel injection with Active Fuel Management |
| Drivetrain | |
| Drive Type | 2WD or 4WD |
| Transmission | |
| Transmission | 6L80 six-speed automatic (4.3L; 5.3L L82 w/AFM) / 8L90 eight-speed automatic (2.7L; 5.3L L84 w/DFM) / 10L80 ten-speed automatic (3.0L diesel; 5.3L L84 10-spd; 6.2L) |
| 1st Gear | 4.7 |
| 2nd Gear | 2.99 |
| 3rd Gear | 2.15 |
| 4th Gear | 1.77 |
| 5th Gear | 1.52 |
| 6th Gear | 1.28 |
| 7th Gear | 1 |
| 8th Gear | 0.85 |
| 9th Gear | 0.69 |
| 10th Gear | 0.64 |
| Reverse | 4.87 |
| Final Drive | 3.23 |
| Fuel Economy | |
| City | 16 MPG |
| Highway | 21 MPG |
| Recommended Fuel | Regular unleaded (4.3L / 2.7L / 5.3L); Premium recommended (6.2L); Ultra-low-sulfur diesel (3.0L) |
| Suspension | |
| Front Suspension | Independent coil-over-shock with twin-tube shock absorbers; Rancho shocks standard with AT4/X31 package; two-speed transfer case or AutoTrac automatic transfer case (4WD) |
| Rear Suspension | Solid axle with semi-elliptic variable-rate two-stage multileaf springs; splayed twin-tube shock absorbers; Rancho shocks standard with AT4/X31 package |
| Brakes | |
| Front Brake Disc | 13.0 x 1.18 in / 330 x 30 mm (Duralife vented) |
| Rear Brake Disc | 13.6 x 0.79 in / 345 x 20 mm (Duralife vented) |
| Tires & Wheels | |
| Wheels Front | 17 x 8-in. steel (std); 17 x 8-in. aluminum (avail); 18 x 8.5-in. aluminum (avail); 20 x 9-in. aluminum (avail); 22 x 9-in. aluminum (avail on Denali) |
| Wheels Rear | 17 x 8-in. steel (std); 17 x 8-in. aluminum (avail); 18 x 8.5-in. aluminum (avail); 20 x 9-in. aluminum (avail); 22 x 9-in. aluminum (avail on Denali) |
| Tires Front | P255/70R17 all-season; P265/70R17 all-season; LT265/70R17 all-terrain; P265/65R18 all-season or all-terrain; LT275/65R18 Goodyear Wrangler DuraTrac; LT265/60R20 Goodyear Wrangler Territory; P275/60R20 all-season or all-terrain; P275/50R22 all-season |
| Tires Rear | P255/70R17 all-season; P265/70R17 all-season; LT265/70R17 all-terrain; P265/65R18 all-season or all-terrain; LT275/65R18 Goodyear Wrangler DuraTrac; LT265/60R20 Goodyear Wrangler Territory; P275/60R20 all-season or all-terrain; P275/50R22 all-season |
| Dimensions & Weight | |
| Length | 229.6 in |
| Width | 81.2 in |
| Height | 75.6 in |
| Wheelbase | 139.5 in |
| Curb Weight | 4,430 lbs |
| Interior | |
| Headroom Front | 43.1 in |
| Legroom Front | 44.5 in |
| Shoulder Room Front | 66.1 in |
| Hip Room Front | 60.9 in |