6.2 L General Motors Diesel
The 6.2 L replaced the 5.7 L Olds in GMC/Chevrolet trucks in 1982. The engine was manufactured by Detroit Diesel, a division of General Motors at the time. The 6.2 was introduced as a fuel-efficient alternative to the gasoline V-8 lineup, appearing at a time when consumers were focused on fuel efficiency more so than power. The naturally aspirated 6.2 was no powerhouse, although it was a reasonable alternative for those who wanted a pickup, but didn't necessarily need the high torque output offered by competitors.
6.2 L GM Specifications:
| Manufacturer: | Detroit Diesel |
| Production Years: | 1982 - 1993 |
| Applications: | GM/Chevrolet C/K trucks, Hummer H1 |
| Configuration: | V-8 |
| Block/Head Material: | cast iron block, cast iron heads |
| Displacement: | 379 cubic inches, 6.2 L |
| Compression: | 21.5:1 |
| Bore: | 3.98 inches |
| Stroke: | 3.80 inches |
| Injection: | IDI (indirect injection) |
| Aspiration: | non-turbo, naturally aspirated |
| Max Engine Speed: | 3,600 RPM |
| Peak Horsepower: | Introductory: 130 HP @ 3,600 RPM Peak: 143 HP @ 3,600 RPM |
| Peak Torque: | Introductory: 240 lb-ft. @ 2,000 RPM Peak: 257 lb-ft. @ 2,000 RPM |
| Reputation: | Reliable, durable, powerful for its era. |
Additional 6.2 L Information:
- Replaced the 5.7 L Olds diesel for GMC/Chevrolet trucks.
- The 6.2 L engine option cost less than $1,500.
- 6.2 L was capable of achieving better fuel economy than some of General Motors V-6 engines.
- Engine weighs approx. 700 lbs.
- 6.2 L powered trucks were federally rated up to 20 MPG city & 23 MPG highway.