This manual covers the Pontiac G8 and Holden Commodore models produced between 2010 and 2011. Built on the GM Zeta platform, these vehicles were engineered to deliver robust performance and engaging rear-wheel-drive dynamics. The Pontiac G8, a rebadged Holden Commodore, was lauded by automotive journalists for its handling and performance, often drawing comparisons to European sport sedans. The Holden Commodore, a popular Australian large sedan, was recognized for its strong construction and comfortable ride. This guide provides detailed information for all models and trims within this production range. This comprehensive service and repair manual offers factory-level detail, encompassing routine maintenance, diagnostics, and component overhauls. It covers all essential vehicle systems, including engine mechanicals, fuel, lubrication, cooling, emissions, ignition, starting/charging, transmissions (automatic and manual), drivetrain, suspension, steering, brakes, electrical systems, climate control, safety restraint systems, and body/interior/exterior components. Included are detailed procedures for scheduled maintenance, fluid changes, filter replacements, troubleshooting guides with diagnostic trouble codes, component removal and installation, and complete electrical wiring diagrams. The manual is presented in English and is designed to assist owners, mechanics, and technicians in maintaining and repairing their vehicles effectively.