1999 GMC Sonoma towing capacity
The 1999 GMC Sonoma is published in 10 configurations, with tow ratings ranging from 2,000 to 5,500 lb depending on cab, bed, drivetrain, and hitch class. The peak figure (5,500 lb) sits in mid-size SUV / pickup territory.
The table below lists every trim of the 1999 GMC Sonoma with the engine, drivetrain, axle ratio, horsepower, torque, GVWR, curb weight, and payload that go with that trim's headline tow rating. Manufacturers often publish more than one tow figure per truck — a conventional bumper-hitch rating, a weight-distributing rating, and a gooseneck or fifth-wheel rating — so the highest number here is the maximum across all hitch classes the source carries for the trim.
Per-trim breakdown
| Configuration | Engine | HP | Torque | Axle | Tow (lb) | GVWR | Curb | Payload |
|---|---|---|---|---|---|---|---|---|
| SL 4x2 Regular Cab 108.3 in. WB | — | 120 | 140 | 3.73 | 2,000 | 4,200 | 3,031 | 1,169 |
| SLS 4x2 Regular Cab 108.3 in. WB | — | 120 | 140 | 3.73 | 2,000 | 4,200 | 3,031 | 1,169 |
| SL 4x2 Regular Cab 117.9 in. WB | — | 120 | 140 | 3.73 | 2,000 | 4,600 | 3,058 | 1,542 |
| SLS 4x2 Regular Cab 117.9 in. WB | — | 120 | 140 | 3.73 | 2,000 | 4,600 | 3,058 | 1,542 |
| SLS 4x2 Extended Cab 122.9 in. WB | — | 120 | 140 | 4.1 | 2,000 | 4,600 | 3,240 | 1,360 |
| SL 4x4 Regular Cab 108.3 in. WB | — | 180 | 240 | 3.08 | 5,500 | 4,650 | 3,564 | 1,086 |
| SLS 4x4 Regular Cab 108.3 in. WB | — | 180 | 240 | 3.08 | 5,500 | 4,650 | 3,564 | 1,086 |
| SL 4x4 Regular Cab 117.9 in. WB | — | 180 | 240 | 3.42 | 5,500 | 5,150 | 4,053 | 1,097 |
| SLS 4x4 Regular Cab 117.9 in. WB | — | 180 | 240 | 3.42 | 5,500 | 5,150 | 4,053 | 1,097 |
| SLS 4x4 Extended Cab 122.9 in. WB | — | 180 | 240 | 3.08 | 5,500 | 4,650 | 3,757 | 893 |
How to interpret the headline tow figure
Tow ratings at this level are normally achievable with a conventional Class II or Class III receiver hitch. Always verify your vehicle has the manufacturer's tow package installed if you intend to tow at the upper end of the rating, and inspect the door-jamb sticker for the actual maximum permitted on your specific configuration.
How this year compares to 1998
The 1998 GMC Sonoma carried a maximum tow rating of 5,500 lb. The 1999 model carries the same headline figure — manufacturers usually leave the rating alone year-over-year unless there's a powertrain or hitch change. See the 1998 GMC Sonoma page for the full per-trim breakdown of the prior year.
Other 1999 GMC models
The rest of GMC's 1999 lineup, ranked by maximum tow rating. Click through for the per-trim breakdown of any of these.
| Model | Max tow (lb) |
|---|---|
| 1999 GMC Sierra 2500 Extended CAB | 10,500 |
| 1999 GMC Sierra 2500 HD Extended CAB | 10,500 |
| 1999 GMC Sierra 2500 HD Regular CAB | 10,500 |
| 1999 GMC Sierra 2500 Regular CAB | 10,500 |
| 1999 GMC Savana 3500 Cargo | 10,000 |
| 1999 GMC Savana 3500 Passenger | 10,000 |
All figures sourced from manufacturer documentation. See our methodology for how the dataset is compiled. Always confirm against your vehicle's door-jamb sticker before towing.