GMC 262ci Specs: 4.00 x 3.48 in

GMC 262ci specs: 4.00 x 3.48 in (101.6 x 88.4 mm) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings, plus rod ratio.

At a glance

Displacement	262 ci
Cylinders	6
Bore	4.000"
Stroke	3.480"
Advertised power	160–280 hp
Years	1992–1995

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
LB4	262 ci	4" × 3.48"	—	160–165
LB4/Z79	262 ci	4" × 3.48"	—	280

Factory cars with a GMC 262ci

• GMC Jimmy: 1992, LB4, 160 hp; 1992, LB4/Z79, 280 hp; 1993, LB4/Z79; 1993, LB4, 165 hp; 1994, LB4, 165 hp
• GMC Sierra 1500: 1992, LB4, 160 hp; 1993, LB4, 165 hp; 1994, LB4, 165 hp; 1995, LB4, 160 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.

← All GMC engines