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19367775 5.3 Liter LM7 GM Remanufactured Engine
The LM7 engine
The LM7 is GM’s Gen III Vortec 5300, part of the LS-based small-block V8 family. It’s a naturally aspirated, 5.3-liter (about 325-cubic-inch) V8 with an iron block, aluminum heads, and sequential port fuel injection. Its bore and stroke are 3.78 × 3.62 inches, and compression is about 9.5:1
Output varied by vehicle and model year. For example, GM’s 2003 Sierra information lists 285 hp and 325 lb-ft; other LM7 applications and years had different ratings.
Listed applications for 19367775
GM’s current listing shows fitment for:
- Chevrolet Silverado 1500 and Suburban 1500, 2001–2004
- Chevrolet Avalanche 1500, 2002–2004
- Chevrolet Express 1500 and 2500, 2003–2004
Fitment depends on the vehicle’s exact engine and configuration. Confirm the VIN, RPO code, transmission, and emissions setup with a GM parts department or seller before buying.
