These instructions apply to the GMC Sierra 1500 Mk3 (K2XX) 2014-2018.
For other models, please choose your vehicle here.
Full specifications for the third-generation GMC Sierra 1500 (K2XX, 2014-2018), laid out by gasoline engine — the 4.3L V6, 5.3L V8 and 6.2L V8. Engine output, towing, economy and dimensions are compiled from manufacturer figures and cross-checked US sources; fluids, capacities and torques are from the owner manual. Dimensions shown are for the common Crew Cab short box. Confirm anything critical against your own truck.
Each column is one specific vehicle — a single engine or motor and, where shown, body style. Dimensions and several weights are specific to that body and drivetrain; other body or powertrain versions differ, so match the column to your own vehicle.
| 4.3L EcoTec3 V6 (LV3) · Crew CabUS | 5.3L EcoTec3 V8 (L83) · Crew CabUS | 6.2L EcoTec3 V8 (L86) · Crew CabUS | |
|---|---|---|---|
| Length | 229.6 in (5,829 mm) mm | 229.6 in (5,829 mm) mm | 229.6 in (5,829 mm) mm |
| Width (excl. mirrors) | 80.0 in (2,032 mm) mm | 80.0 in (2,032 mm) mm | 80.0 in (2,032 mm) mm |
| Height | 74.0 in (1,879 mm) mm | 74.0 in (1,879 mm) mm | 74.0 in (1,879 mm) mm |
| Wheelbase | 143.5 in (3,645 mm) mm | 143.5 in (3,645 mm) mm | 143.5 in (3,645 mm) mm |
| Track (front / rear) | — | — | — |
| Ground clearance | — | — | — |
| 4.3L EcoTec3 V6 (LV3) · Crew CabUS | 5.3L EcoTec3 V8 (L83) · Crew CabUS | 6.2L EcoTec3 V8 (L86) · Crew CabUS | |
|---|---|---|---|
| Kerb weight | approx 4,520-5,350 lb (config-dependent) kg | approx 4,520-5,350 lb (config-dependent) kg | approx 5,276 lb (Crew 4WD) kg |
| Gross vehicle weight | 7,000-7,600 lb kg | 7,000-7,600 lb kg | 7,000-7,600 lb kg |
| Payload (approx.) | — | — | — |
| Max axle load, front | — | — | — |
| Max axle load, rear | — | — | — |
| Towing (braked trailer) | Up to ~7,200 lb (config-dependent) | Up to 11,200 lb (Max Trailering) | Up to 12,000 lb (Max Trailering) |
| Gross combined weight (GCWR) | — | — | — |
| Hitch / trailer class | — | — | — |
| 4.3L EcoTec3 V6 (LV3) · Crew CabUS | 5.3L EcoTec3 V8 (L83) · Crew CabUS | 6.2L EcoTec3 V8 (L86) · Crew CabUS | |
|---|---|---|---|
| Cab configurations | Regular / Double / Crew Cab | Regular / Double / Crew Cab | Regular / Double / Crew Cab |
| Bed length options | Short (5'8"), Standard (6'6"), Long (8') box | Short (5'8"), Standard (6'6"), Long (8') box | Short (5'8"), Standard (6'6"), Long (8') box |
| Bed / cargo volume | — | — | — |
| Approach / departure angle | — | — | — |
| 4.3L EcoTec3 V6 (LV3) · Crew CabUS | 5.3L EcoTec3 V8 (L83) · Crew CabUS | 6.2L EcoTec3 V8 (L86) · Crew CabUS | |
|---|---|---|---|
| Engine code | LV3 | L83 | L86 |
| Fuel | Petrol | Petrol | Petrol |
| Cylinders / layout | 6, V | 8, V | 8, V |
| Displacement | 4,300 cc (4.3 L) cc | 5,328 cc (5.3 L) cc | 6,162 cc (6.2 L) cc |
| Max power | 285 hp (213 kW) @ 5,300 rpm | 355 hp (265 kW) @ 5,600 rpm | 420 hp (313 kW) @ 5,600 rpm |
| Max torque | 305 lb-ft (413 Nm) @ 3,900 rpm | 383 lb-ft (519 Nm) @ 4,100 rpm | 460 lb-ft (624 Nm) @ 4,100 rpm |
| Aspiration | Naturally aspirated | Naturally aspirated | Naturally aspirated |
| Emission standard | — | — | — |
| 4.3L EcoTec3 V6 (LV3) · Crew CabUS | 5.3L EcoTec3 V8 (L83) · Crew CabUS | 6.2L EcoTec3 V8 (L86) · Crew CabUS | |
|---|---|---|---|
| 0–100 km/h (0–60 mph) | — | — | — |
| Top speed | — | — | — |
| Drive | Rear- or four-wheel drive | Rear- or four-wheel drive | Rear- or four-wheel drive |
| Transmission | 6-speed automatic (6L80) | 6-speed automatic (later 8-speed on some trims) | 6-speed auto (2014); 8-speed auto (8L90) from 2015 |
| 4.3L EcoTec3 V6 (LV3) · Crew CabUS | 5.3L EcoTec3 V8 (L83) · Crew CabUS | 6.2L EcoTec3 V8 (L86) · Crew CabUS | |
|---|---|---|---|
| Fuel consumption (combined) | RWD 20 / 4WD 19 mpg (EPA combined) | RWD 19 / 4WD 18 mpg (EPA combined) | 17 mpg (EPA combined) |
| Urban / extra-urban | — | — | — |
| CO₂ (combined) | — | — | — |
| Fuel tank | 98 L (26 US gal) std; 24 gal on some short-box | 98 L (26 US gal) std | 98 L (26 US gal) std |
| Drive-by noise | — | — | — |
| 4.3L EcoTec3 V6 (LV3) · Crew CabUS | 5.3L EcoTec3 V8 (L83) · Crew CabUS | 6.2L EcoTec3 V8 (L86) · Crew CabUS | |
|---|---|---|---|
| Front brakes | — | — | — |
| Rear brakes | — | — | — |
| Tyre sizes | 255/70R17, 265/70R17, 265/65R18 | 265/65R18, 275/55R20 | 275/55R20 |
| Rim sizes | — | — | — |
| Tyre pressures, normal (front / rear) | 35 psi front & rear (17-18 in); verify door-pillar placard | 35 psi (18 in) / 32 psi (20 in); verify placard | 32 psi (20 in); verify door-pillar placard |
| Tyre pressures, laden (front / rear) | — | — | — |
| Wheel-nut torque | 190 Nm (140 lb-ft) | 190 Nm (140 lb-ft) | 190 Nm (140 lb-ft) |
| 4.3L EcoTec3 V6 (LV3) · Crew CabUS | 5.3L EcoTec3 V8 (L83) · Crew CabUS | 6.2L EcoTec3 V8 (L86) · Crew CabUS | |
|---|---|---|---|
| Engine oil (with filter) | 5.7 L (6.0 qt) · SAE 5W-30 (dexos1) | 7.6 L (8.0 qt) · SAE 0W-20 (dexos1; 5W-30 for 2014-15) | 7.6 L (8.0 qt) · SAE 0W-20 (dexos1; 5W-30 for 2014-15) |
| Coolant | 15.1 L · DEX-COOL (50/50) | 15.7 L · DEX-COOL (50/50) | 15.7 L · DEX-COOL (50/50) |
| Gearbox oil (manual) | — | — | — |
| 12 V battery | Engine bay, driver side · maintenance-free (see OE label for group/CCA) | Engine bay, driver side · maintenance-free (see OE label for group/CCA) | Engine bay, driver side · maintenance-free (see OE label for group/CCA) |
| Air-con refrigerant | — | — | — |
| Spark plugs | — | — | — |
| Spark-plug gap | 0.95-1.10 mm (0.037-0.043 in) | 0.95-1.10 mm (0.037-0.043 in) | 0.95-1.10 mm (0.037-0.043 in) |
Sources: Owner's manual · Workshop data. Where an owner’s manual or homologation figure exists it takes precedence; workshop data fills only what those omit.
A dash (—) means we haven’t verified that figure for that variant yet, not that it doesn’t exist. Figures are US-market. Towing, payload and weights are best-case/config-dependent — your door-jamb label is the authority.
Frequently Asked Questions
Which engine does my Sierra 1500 have?
The K2XX offered three gas engines: a 285 hp 4.3L V6, a 355 hp 5.3L V8, and a 420 hp 6.2L V8. The 6.2L gained an 8-speed automatic from 2015.
How much can the 2014-2018 Sierra 1500 tow?
Up to about 7,200 lb with the V6, up to 11,200 lb with the 5.3L and up to 12,000 lb with the 6.2L, when equipped with the Max Trailering Package. Real figures depend on cab, axle and trim.
What oil does it take?
5.7 L (6.0 qt) of 5W-30 on the 4.3L V6, and 7.6 L (8.0 qt) on the V8s — 0W-20 for 2016 and later, 5W-30 on 2014-2015. All dexos1.
What size tires and pressures?
Common fitments run 265/70R17 and 265/65R18 at 35 psi, or 20-inch wheels at 32 psi. Your door-pillar label is the authority.
Disclaimer: Specifications vary by model year, trim, cab, bed and options. Always confirm critical figures (towing, payload, weights, tire sizes) against your own vehicle’s door label and documents.
Servicing your GMC Sierra 1500? Browse the GMC Sierra 1500 guides, and decode any fault code on autodtcs.com.
Independent guide — not affiliated with GMC. Always follow your official service manual and safety precautions. Read our full disclaimer.