2020 GMC Sierra SLT 2.7L Turbo I-4 4x4 Towing Capacity: 9,500 lbs (Verified Specs)
The 2020 GMC Sierra SLT 2.7L Turbo I-4 4x4 has a maximum towing capacity of 9,500 lbs, a payload rating of 2,280 lbs, a gross combined weight rating (GCWR) of 13,900 lbs, and a maximum tongue weight of 950 lbs. It uses a Class IV receiver hitch when properly equipped.
All 2020 trims compared
| Trim | Max Tow | Payload | GCWR | Tongue | Hitch |
|---|---|---|---|---|---|
| Base 4.3L EcoTec3 V6 4x2 | 7,900 lbs | 2,000 lbs | 12,500 lbs | 790 lbs | IV |
| SLT 2.7L Turbo I-4 4x4 | 9,500 lbs | 2,280 lbs | 13,900 lbs | 950 lbs | IV |
| Denali 3.0L Duramax I-6 Diesel 4x4 | 9,300 lbs | 1,870 lbs | 14,000 lbs | 930 lbs | V |
| AT4 6.2L EcoTec3 V8 4x4 Max Trailering | 12,100 lbs | 1,690 lbs | 17,000 lbs | 1,210 lbs | V |
What can the 2020 GMC Sierra SLT 2.7L Turbo I-4 4x4 tow?
With its 9,500 lbs max tow rating, the 2020 GMC Sierra SLT 2.7L Turbo I-4 4x4 can pull these typical trailer types when properly equipped:
- Pop-up tent campers (typically 1,000–3,000 lbs)
- Small travel trailers up to 22 feet (typical dry weight 3,500–4,500 lbs)
- Mid-size travel trailers up to 26 feet (5,000–7,000 lbs)
- Single-jet-ski / two-PWC trailers (1,500–2,500 lbs)
- Boats up to 22 ft on a trailer (4,000–5,500 lbs total)
- Boats up to 28 ft (7,500–8,500 lbs total)
- Two-horse straight-load horse trailers (5,500–6,800 lbs loaded)
Required equipment
For maximum capacity towing on the 2020 GMC Sierra SLT 2.7L Turbo I-4 4x4 you need: a Class IV receiver hitch, a proportional brake controller (legally required on trailers over 3,000 lbs in most US states), trailer wiring harness, and — for trailers above 5,000 lbs — a weight-distribution hitch.
5 common towing mistakes with the GMC Sierra
- Loading the trailer past the manufacturer's max tow rating without verifying GCWR margin
- Ignoring tongue weight: keep it 10–15% of total trailer weight or the trailer will sway
- Skipping a brake controller on trailers over 3,000 lbs — most US states require trailer brakes above this weight
- Forgetting to redistribute payload from cargo when carrying passengers; payload includes occupants
- Running stock tires beyond their D/E load rating when towing near the max — upgrade if towing weekly
Compare with similar vehicles
Frequently asked questions
What is the towing capacity of a 2020 GMC Sierra SLT 2.7L Turbo I-4 4x4? ▾
The 2020 GMC Sierra SLT 2.7L Turbo I-4 4x4 has a maximum towing capacity of 9,500 lbs when properly equipped with the manufacturer's tow package.
Can a 2020 GMC Sierra tow a 30-foot travel trailer? ▾
Yes — a 30-foot travel trailer typically weighs 7,500–9,000 lbs loaded, which is within this trim's 9,500 lbs rating. Verify your specific trailer's GVWR and stay under 80% of max tow for comfortable towing.
Can a 2020 GMC Sierra tow a fifth-wheel? ▾
Not recommended. Most fifth-wheels start at 8,000 lbs and exceed this trim's 9,500 lbs capacity. Step up to a heavy-duty model.
What hitch class does the 2020 GMC Sierra use? ▾
The 2020 GMC Sierra SLT 2.7L Turbo I-4 4x4 is rated for a Class IV receiver hitch.
What is the payload of the 2020 GMC Sierra SLT 2.7L Turbo I-4 4x4? ▾
Payload is rated at 2,280 lbs. Remember payload includes passengers, cargo, hitch tongue weight, and any aftermarket equipment.
What is GCWR and why does it matter? ▾
Gross Combined Weight Rating (GCWR) is the max combined weight of the loaded vehicle and trailer. The 2020 GMC Sierra SLT 2.7L Turbo I-4 4x4 is rated at 13,900 lbs. Exceeding GCWR is a leading cause of brake and transmission failure.
Do I need a weight-distribution hitch? ▾
For trailers above 5,000 lbs, Ford/GM/Ram/Toyota all recommend a weight-distribution hitch. It transfers tongue weight back across both axles, restoring proper steering and braking.
Do I need a brake controller for this trim? ▾
Yes, when towing a trailer over 3,000 lbs (most US states legally require trailer brakes above this weight). The 2020 GMC Sierra typically supports a proportional integrated brake controller — confirm trim availability.
What is tongue weight on the 2020 GMC Sierra SLT 2.7L Turbo I-4 4x4? ▾
Maximum tongue weight is 950 lbs (industry-standard 10% of max tow rating). Aim for 10–15% of actual trailer weight to avoid sway.
Is the 2020 GMC Sierra better than its competitors for towing? ▾
Within its capacity bracket, the 2020 GMC Sierra SLT 2.7L Turbo I-4 4x4 is competitive at 9,500 lbs. See the "Compare with" section below for direct comparisons against same-class alternatives.