General Motors' Vortec engine has powered some of the best cars GM ever made, but it's not without its problems. Which years present the most issues?

General Motors' LS engine is extremely popular, and that also applies to the 6.2-liter version. What do the owners and ...

at the proper times during the engine's cycle, the system produced considerable performance improvements within the Vortec motors. Unfortunately, this system created many problems and forced ...

is yet another class-action proceeding against GM over alleged oil consumption problems in the Generation IV 5.3L Vortec V8 engine. The automaker is already facing a number of other similar class ...

Outside of faulty ICV and TPS sensors, a few other problems plague the Vortec 4300. Worn-out intake manifold gaskets are a common issue for this engine and can cause vacuum and coolant leaks.

The 5.3L LC9 Vortec is a performance engine at heart ... at 354 reports compared to just four for the 2006 model year. Engine problems were the most common issue, although CarComplaints lists ...

Vortech Engineering has done it again. Now owners of 1999-2013 Gen III and Gen IV Vortec V8 engines (as pulled out of Chevy, GMC, and Hummer light trucks and SUVs) can install a belt driven V3 SCi ...

Specifically, the Vortec LC9 5.3-liter V8 used ... Despite this, the engine was plagued with trouble from the beginning, with problems stemming from the piston rings as well as the fuel management ...

the 5.3-liter LC9 Vortec V8 has a combination of issues, including defective piston rings and faults with the AFM system, that cause excessive oil consumption and major engine problems.