<p dir="ltr" style="line-height: 1.38; margin-top: 12pt; margin-bottom: 12pt;">[size= 11pt; font-family: Arial,sans-serif; color: #000000; background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap]The LM7 engine, introduced by General Motors in 1999, is one of the most notable members of the Generation III small-block V8 engine family, commonly referred to as the Vortec series. Specifically designed for use in trucks and SUVs, the LM7 is a 5.3-liter, naturally aspirated V8 that blends durability, efficiency, and affordability. Over its production span from 1999 to 2007, the LM7 powered a wide range of Chevrolet, GMC, and Cadillac vehicles, earning a reputation as a dependable workhorse in both stock and modified forms.[/size]



<p dir="ltr" style="line-height: 1.38; margin-top: 12pt; margin-bottom: 12pt;">[size= 11pt; font-family: Arial,sans-serif; color: #000000; background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap]At its core, the LM7 engine features a displacement of 5.3 liters (325 cubic inches), achieved with a bore of 96 mm (3.78 inches) and a stroke of 92 mm (3.62 inches). The block itself is made of cast iron, which provides excellent strength and durability under heavy loads. This makes the LM7 well-suited for truck and towing applications, though it also carries some extra weight compared to its aluminum-block counterparts like the LM4 and L33.[/size]