This Service and Repair Manual covers the General Motors LQ4 and LQ9 V8 internal combustion engines, known for their robust performance and versatility. These 6.0L (364 cu in) gasoline engines, part of the Vortec/LS-based family, deliver approximately 300-345 horsepower and 365-380 lb-ft of torque, making them ideal for light-duty trucks, SUVs, and performance applications. Engineered for reliability, these engines provide a powerful and efficient driving experience.

This manual provides comprehensive guidance for maintaining and repairing your General Motors LQ4/LQ9 engine. It details essential procedures, including recommended oil type (API Service SG or higher, SAE 5W-30) and capacity (7 quarts with filter), scheduled maintenance intervals, and regular inspection requirements for fluids, belts, and hoses. Technical specifications, troubleshooting information, and safety guidelines are also included to assist owners, mechanics, and technicians in ensuring optimal engine performance and longevity.

This Service and Repair Manual covers the General Motors LQ4 and LQ9 V8 internal combustion engines, known for their robust performance and versatility. These 6.0L (364 cu in) gasoline engines, part of the Vortec/LS-based family, deliver approximately 300-345 horsepower and 365-380 lb-ft of torque, making them ideal for light-duty trucks, SUVs, and performance applications. Engineered for reliability, these engines provide a powerful and efficient driving experience.

This manual provides comprehensive guidance for maintaining and repairing your General Motors LQ4/LQ9 engine. It details essential procedures, including recommended oil type (API Service SG or higher, SAE 5W-30) and capacity (7 quarts with filter), scheduled maintenance intervals, and regular inspection requirements for fluids, belts, and hoses. Technical specifications, troubleshooting information, and safety guidelines are also included to assist owners, mechanics, and technicians in ensuring optimal engine performance and longevity.