The Chevrolet HHR, produced from 2006 to 2010, is a compact crossover SUV renowned for its distinctive retro-modern styling, inspired by classic Chevrolet designs. Available in LS, LT, 2LT, and performance-oriented SS trims, it offers a versatile and spacious interior for its class, with ample cargo capacity when the rear seats are folded. The HHR is built on the GM Delta platform and features a range of engine options, including the 2.2L Ecotec for LS and LT models and a potent 2.0L turbocharged Ecotec for the SS variant, delivering up to 260 horsepower. Its practical design, coupled with a comfortable ride and available features, made it a unique offering in the automotive market. This comprehensive workshop service repair manual provides detailed guidance for maintaining and repairing Chevrolet HHR models from 2006 to 2008, covering LS, LT, 2LT, and SS trims with all engine and transmission types. The manual encompasses a wide array of systems, including engine mechanicals, fuel, ignition, brakes, steering, suspension, electrical components, HVAC, body, chassis, and restraint systems. It offers extensive procedures for routine maintenance, diagnostics, troubleshooting, component disassembly and assembly, and repair, along with crucial technical specifications. This resource is designed to assist owners, technicians, and mechanics in ensuring the optimal performance, reliability, and longevity of their Chevrolet HHR vehicles.