This Master Service Repair Manual covers the Vortec LQ4 and LQ9, internal combustion engines designed by General Motors for automotive applications, primarily trucks and SUVs. These 6.0L (364 cu in) V8 gasoline engines, part of the GM LS Engine Family, are known for their robust performance, with horsepower ratings around 325 hp for the LQ4 and 340 hp for the LQ9, and a consistent torque of 370 lb-ft. Featuring a cast iron block and aluminum cylinder heads, these engines are engineered for reliability and power, utilizing an Overhead Valve (OHV) valvetrain and a distributorless electronic ignition system.

This comprehensive English-language manual provides essential information for the maintenance and repair of the Vortec LQ4 and LQ9 engines. It details critical procedures, technical specifications, and troubleshooting guidance necessary for optimal performance and longevity. Owners, mechanics, and technicians will find valuable data on engine oil capacity and recommended oil types, along with detailed specifications for bore, stroke, compression ratios, and more. The manual serves as a definitive resource for understanding and servicing these powerful V8 engines.

This Master Service Repair Manual covers the Vortec LQ4 and LQ9, internal combustion engines designed by General Motors for automotive applications, primarily trucks and SUVs. These 6.0L (364 cu in) V8 gasoline engines, part of the GM LS Engine Family, are known for their robust performance, with horsepower ratings around 325 hp for the LQ4 and 340 hp for the LQ9, and a consistent torque of 370 lb-ft. Featuring a cast iron block and aluminum cylinder heads, these engines are engineered for reliability and power, utilizing an Overhead Valve (OHV) valvetrain and a distributorless electronic ignition system.

This comprehensive English-language manual provides essential information for the maintenance and repair of the Vortec LQ4 and LQ9 engines. It details critical procedures, technical specifications, and troubleshooting guidance necessary for optimal performance and longevity. Owners, mechanics, and technicians will find valuable data on engine oil capacity and recommended oil types, along with detailed specifications for bore, stroke, compression ratios, and more. The manual serves as a definitive resource for understanding and servicing these powerful V8 engines.