GMC 364ci Specs: 4.00 x 3.622 in

GMC 364ci specs: 4.00 x 3.622 in (101.6 x 92 mm) bore and stroke, shared by all 5 versions. Displacement, compression and factory ratings, plus rod ratio.

At a glance

Displacement	364 ci
Cylinders	8
Bore	4.000"
Stroke	3.622"
Advertised power	300–367 hp
Years	2001–2013

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
LQ4	364 ci	4" × 3.622"	—	300–325
LQ9	364 ci	4" × 3.622"	—	345
L76	364 ci	4" × 3.622"	—	367
LFA	364 ci	4" × 3.622"	—	332
LZ1	364 ci	4" × 3.622"	—	332

Factory cars with a GMC 364ci

• GMC Sierra 1500: 2001, LQ4, 300 hp; 2001, LQ4, 325 hp; 2002, LQ4, 300 hp; 2002, LQ4, 325 hp; 2003, LQ4, 300 hp; 2003, LQ4, 325 hp; 2004, LQ4, 325 hp; 2005, LQ9, 345 hp; 2006, LQ4, 300 hp; 2006, LQ9, 345 hp; 2007, LQ4, 300 hp; 2007, LQ9, 345 hp; 2007, L76, 367 hp; 2008, L76, 367 hp; 2009, LFA, 332 hp; 2009, L76, 367 hp; 2010, LZ1, 332 hp; 2011, LZ1, 332 hp; 2012, LZ1, 332 hp; 2013, LZ1, 332 hp

What varies across the family

All are oversquare — bore larger than stroke, which favours revs over low-end torque.

Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.

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