See other engines in this family
The same engine also has a main page: Chevrolet LFX.
GMC LFX specs: 217 ci (3.6L) 6-cylinder, 3.701 x 3.37 in (94 x 85.6 mm) bore and stroke. Rated 301-305 hp, 2013–2017. Used in the GMC Terrain. DOHC.
The GMC 217ci (LFX) is oversquare — the 3.7008" bore exceeds the 3.3701" stroke by 9.8% — a layout that favors airflow and RPM over leverage at the crank. The 3.3701" stroke does not reach 4,000 ft/min of mean piston speed until about 7,100 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 36.2 ci (593 cc).
It is one of 3 engines in the GMC 217ci family, all of them 217 ci — the differences between them are in compression, heads and rating, not displacement. 7 factory variants share these dimensions, rated from 301 to 305 hp across 2013–2017.
| Displacement | 217 ci / 3.6 L |
|---|---|
| Bore | 3.7008" |
| Stroke | 3.3701" |
| Cylinders | 6 |
| Configuration | V6 |
| Bore/stroke ratio | 1.098 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 301–305 hp |
| Years | 2013–2017 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2013 | LFX net | 301 @ 6500 * | 272 lb-ft @ 4800 * | — |
| 2014 | LFX net | 301 @ 6500 * | 272 lb-ft @ 4800 * | — |
| 2015 | LFX net | 301 @ 6500 * | 272 lb-ft @ 4800 * | — |
| 2015 | LFX net | 305 @ 6800 * | 269 lb-ft @ 4000 * | — |
| 2016 | LFX net | 301 @ 6500 * | 272 lb-ft @ 4800 * | — |
| 2016 | LFX net | 305 @ 6800 * | 269 lb-ft @ 4000 * | — |
| 2017 | LFX net | 301 @ 6500 * | 272 lb-ft @ 4800 * | — |
Factory specification sheet. * Not yet cross-verified.
| Bore/stroke character | 1.098 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,370 ft/min — conservative for a street engine |
| Displacement per cylinder | 36.2 ci |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 2013 | 301 hp | LFX |
| 2014 | 301 hp | LFX |
| 2015 | 301 hp | LFX |
| 2015 | 305 hp | LFX |
| 2016 | 301 hp | LFX |
| 2016 | 305 hp | LFX |
| 2017 | 301 hp | LFX |
3 factory vehicles, 2013–2017. Each year opens that model's engine table.