Gsm Ls1 Ak Ls2 Ls3 [ HD ]

Before breaking down the specific engine displacements and performance characteristics, it is important to clarify what these letters and numbers mean within the GM ecosystem. What is GSM?

| Feature | LS1 | LS2 | LS3 | | :--- | :--- | :--- | :--- | | | 1997–2005 | 2005–2009 | 2008–2017 | | Generation | Gen. III | Gen. IV | Gen. IV | | Displacement | 5.7L (346 ci) | 6.0L (364 ci) | 6.2L (376 ci) | | Bore Diameter | 3.898 in | 4.000 in | 4.065 in | | Cylinder Heads | Cathedral Port | Cathedral Port (243/799) | Rectangular Port (LS3/L92) | | Stock HP | ~345–350 hp | ~390–400 hp | ~426–436 hp | | Stock TQ | ~350–365 lb-ft | ~400–405 lb-ft | ~420–428 lb-ft | | Reluctor Wheel | 24x | 58x | 58x | | Cam Sensor | Rear of the block | Front of the block (cover) | Front of the block (cover) | gsm ls1 ak ls2 ls3