The 1998 GMC Sonoma with the 4.3-liter V6 typically produced 190 horsepower, along with about 260 pound-feet of torque. This is the standard figure cited for that model year and engine family.
In this article, we break down the official numbers for the 4.3-liter V6 used in the Sonoma, explain what those figures mean for everyday driving, and place the engine in the broader context of GM’s Vortec family from the late 1990s.
Engine at a glance
Below are the core specifications commonly cited for the 4.3-liter V6 used in the 1998 Sonoma. These figures come from GM's Vortec 4300 family and are reflected in dealer literature and owner manuals of the era.
Key figures
- Displacement: 4.3 L (262 cu in)
- Configuration: 90-degree V6
- Engine family: Vortec 4300
- Horsepower: 190 hp
- Torque: 260 lb-ft
Note: Real-world output can vary with emissions equipment, altitude, wear, exhaust and intake conditions, and diagnostic status. The numbers above reflect typical factory specifications for the era.
What horsepower means for the Sonoma’s performance
horsepower is only part of the story. In the Sonoma, torque plays a major role in daily driving—especially during initial acceleration and while carrying payloads. The 190-horsepower rating pairs with roughly 260 lb-ft of torque to deliver usable mid-range grunt, which helps with highway merging and towing limits for a compact pickup of its era. Vehicle weight, gearing, and drivetrain configuration also shape how this power translates to real-world performance.
Summary
For a 1998 GMC Sonoma equipped with the 4.3-liter V6, the factory rating sits around 190 horsepower and about 260 lb-ft of torque. These figures come from GM’s Vortec 4300 family and are widely cited in period documentation. If you’re evaluating a used Sonoma today, expect some variation due to wear, modifications, and differing emission controls, and consider verifying the exact VIN-build data or performing a current performance check for precise numbers.