GMC 395ci Specs: 4.06 x 3.82 in

GMC 395ci specs: 4.06 x 3.82 in (103.1 x 97 mm) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings, plus rod ratio.

At a glance

Displacement	395 ci
Cylinders	8
Bore	4.060"
Stroke	3.820"
Advertised power	155–180 hp
Years	1994–1998

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
L49	395 ci	4.06" × 3.82"	—	155
L56	395 ci	4.06" × 3.82"	—	180

Factory cars with a GMC 395ci

• GMC Sierra 1500: 1994, L49, 155 hp; 1994, L56, 180 hp; 1995, L49, 155 hp; 1995, L56, 180 hp; 1996, L56, 180 hp; 1997, L56, 180 hp; 1998, L56, 180 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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