The Vortec 6000, or LQ4, is a V8 truck engine. Displacement is 6.0 L (~366 cu in) from 101.6 mm bore and 92 mm stroke 4.0 inch bore 3.622 inch stroke . It is an iron/aluminum (1999 & 2000 model year engines had cast iron heads) design and produces 300 horsepower (220 kW) to 325 horsepower (242 kW) and 360 lb·ft (488 N·m) to 370 lb·ft (502 N·m). LQ4s are built in Romulus, Michigan and Silao, Mexico.

This kit includes a re programmed  factory ECU with all vehicle anti theft removed, & Harness for use with mechanical cable drive or drive by wire throttle bodies, depending on application.  Includes  fuse block, electric fan controls, relays for electric fans & fuel pump.  Harness is 5 wire hook up to chassis (12v+,ignition, tach, fuel pump , electric fan +)  this system requires the use of 2 o2sensors and MAF sensor not included in all  kits. Some drive by wire applications may require a tach module, call for more info.  There is no ECU core required.  Please call or Contact us for VVT applications. Depending on engine trans combo some of these packages can run GM automatic transmissions as well.  Please call or Contact us