GMC 217ci Specs: 3.701 x 3.37 in

GMC 217ci specs: 3.701 x 3.37 in (94 x 85.6 mm) bore and stroke, shared by all 3 versions. Displacement, compression and factory ratings, plus rod ratio.

At a glance

Displacement	217 ci
Cylinders	6
Bore	3.701"
Stroke	3.370"
Advertised power	275–305 hp
Years	2007–2017

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
LY7	217 ci	3.7008" × 3.3701"	—	275
LLT	217 ci	3.7008" × 3.3701"	—	288
LFX	217 ci	3.7008" × 3.3701"	—	301–305

Factory cars with a GMC 217ci

• GMC Acadia: 2007, LY7, 275 hp; 2008, LY7, 275 hp; 2009, LLT, 288 hp; 2010, LLT, 288 hp; 2011, LLT, 288 hp; 2012, LLT, 288 hp; 2013, LLT, 288 hp; 2014, LLT, 288 hp; 2015, LLT, 288 hp; 2016, LLT, 288 hp
• GMC Terrain: 2013, LFX, 301 hp; 2014, LFX, 301 hp; 2015, LFX, 301 hp; 2016, LFX, 301 hp; 2017, LFX, 301 hp
• Chevrolet Impala: 2015, LFX, 305 hp; 2016, LFX, 305 hp
• GMC Canyon: 2015, LFX, 305 hp; 2016, LFX, 305 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