The GMC Sierra 2500HD 2000-2006 Factory Workshop Service Repair Manual is an indispensable resource for professional mechanics and DIY enthusiasts alike. This comprehensive manual provides detailed instructions and step-by-step diagrams for all workshop procedures, ensuring accurate and efficient repairs.

Covering a wide range of systems and components, the manual equips you with the knowledge to tackle any repair challenge. From the intricate workings of the engine and transmission to the complexities of the electrical system and suspension, every aspect of the GMC Sierra 2500HD is meticulously documented. High-resolution illustrations, detailed instructions, and clear diagrams make even the most complex procedures easy to understand and execute.

The manual encompasses a vast array of topics, including:

* **Engine:** Detailed information on engine mechanicals, including the 4.3L, 4.8L, 5.3L, 6.0L, 6.6L (LB7 and LLY), and 8.1L engines. Covers engine performance, cooling, exhaust, and controls.
* **Transmission:** Comprehensive coverage of the Allison, 4L60E, 4L65E, 4L80E, 4L85E, NV3500, NV4500, and ZF S6-650 transmissions. Includes diagnostic information, troubleshooting, and overhaul procedures.
* **Driveline and Axle:** Covers the front and rear drive axles, propeller shaft, transfer case, and wheel drive shafts. Provides detailed instructions for repair and maintenance.
* **Brakes:** Explores the antilock brake system, disc brakes, hydraulic brake system, and parking brake, offering complete repair procedures.
* **Suspension:** Covers the front and rear suspension systems, including selectable ride options. Provides instructions for diagnosis and repair.
* **Electrical System:** Offers detailed information on the battery, charging system, starting system, fuses, circuit breakers, and wiring diagrams.
* **Body:** Includes instructions for servicing the body control system, front and rear end, bumpers, doors, exterior trim, frame and underbody, lighting system, and interior trim.
* **HVAC:** Provides comprehensive information on the heating, ventilation, and air conditioning system, including both automatic and manual systems.
* **Safety and Restraints:** Features detailed instructions for servicing the seatbelts and SIR (Supplemental Inflatable Restraint) system.
* **Steering:** Covers the power steering, rear wheel steering, steering linkage, and steering wheel and column, providing complete repair procedures.
* **General Information:** Includes valuable information on diagnostic connector locations, maintenance and lubrication, and general repair procedures.

With this comprehensive manual, you'll have the necessary tools to keep your GMC Sierra 2500HD running smoothly and efficiently.

The GMC Sierra 2500HD, a heavy-duty pickup truck produced from 2000 to 2006, embodies the ruggedness and capability expected from a GMC truck. This iteration marked a significant departure from previous models, featuring an entirely new chassis and drivetrain. The heart of the Sierra 2500HD resided under the hood, where powerful Vortec V8 engines provided ample power for towing and hauling heavy loads. Customers could choose between the 6.0L Vortec V8, rated at 295 horsepower and 360 lb-ft of torque, or the optional 8.1L Vortec V8, delivering 320 horsepower and 440 lb-ft of torque. This robust power was transferred to the wheels through either a 4L80-E 4-speed automatic transmission or, in later years, a 4L65-E 4-speed automatic transmission, both known for their reliability and durability. The Sierra 2500HD was available in a variety of configurations, with choices between single, extended, and crew cab models, and payload capacities reaching up to 2,000 lbs.

Beyond its impressive performance, the GMC Sierra 2500HD offered a comfortable and versatile cabin. The interior featured durable materials and a practical layout, with seating for up to six passengers. The truck's standard features included power steering, air conditioning, and a AM/FM stereo. Optional amenities added a touch of luxury, such as leather upholstery, heated seats, and a premium sound system. Building upon its reputation for dependability, the Sierra 2500HD gained popularity among work truck users, recreational enthusiasts, and families seeking a capable vehicle. Its strong engine, rugged construction, and practical features made it a reliable choice for a diverse range of applications. Despite its age, the GMC Sierra 2500HD remains a sought-after vehicle, sought for its hard-working nature and durable construction.