To make it easier for you to choose the right manual, we have compiled various information for you below, such as model designations, types, and production years. Additionally, we have included technical data and tips regarding repair, maintenance, and overhaul.
The following models are encompassed by this manual: Sierra 2500 HD / GMC
1998 GMC Sierra 2500 HD
1999 GMC Sierra 2500 HD
Production year(s): 1998, 1999
Manual Language: English
Instant delivery/download: Your download link will appear on the checkout page after your payment is complete.
Printable: Yes (with all printers)
"Troubleshooting Guide: Fix GMC Sierra 2500 HD Issues with Downloadable PDF Manual"
Welcome to our comprehensive troubleshooting guide for the 1998-1999 GMC Sierra 2500 HD trucks. Whether you're an owner looking to address common issues, perform maintenance tasks, or enhance the performance of your vehicle, this guide will provide you with valuable information. From engine specifications to tuning tips, accessories, and owner reviews, we've got you covered. Let's dive in!
Engine Specifications/Technical Data:
• The 1998-1999 GMC Sierra 2500 HD is equipped with a powerful Vortec 7400 V8 engine.
• It has a displacement of 7.4 liters (454 cubic inches).
• The engine features a cast iron block and cylinder heads for durability.
• It utilizes sequential fuel injection for precise fuel delivery.
• The compression ratio is 7.9:1.
• The Sierra 2500 HD is equipped with an electronically controlled four-speed automatic transmission.
• It produces an output of around 290 horsepower and 410 lb-ft of torque.
• The truck has a maximum towing capacity of approximately 10,000 pounds.
• It features a heavy-duty cooling system for enhanced temperature management.
• The front suspension consists of independent torsion bars, while the rear suspension utilizes leaf springs.
• It has a payload capacity of up to 3,000 pounds.
• The Sierra 2500 HD is available in both two-wheel drive and four-wheel drive configurations.
• It comes with power-assisted recirculating ball steering for precise handling.
• The fuel tank has a capacity of approximately 34 gallons.
• The truck's curb weight ranges from around 5,300 to 5,700 pounds, depending on the configuration.
• The front brakes are equipped with disc brakes, while the rear brakes utilize drum brakes.
• The truck features a spacious interior with seating for up to six occupants.
• It offers a variety of available trim levels and optional equipment for customization.
• The Sierra 2500 HD has an overall length of approximately 222 inches.
• The wheelbase measures around 133 inches.
Facts and Details:
- The Sierra 2500 HD is part of GMC's heavy-duty truck lineup designed for towing and hauling purposes.
- It features a rugged frame construction and reinforced suspension components for increased durability.
- The Vortec 7400 engine delivers ample power for towing heavy loads and provides strong acceleration.
- The truck's spacious interior offers comfortable seating and ample storage options.
- It is known for its reliable performance and ability to handle demanding tasks.
- The Sierra 2500 HD is designed to withstand heavy use and offers a long lifespan with proper maintenance.
- It provides a stable and confident towing experience, thanks to its robust chassis and towing capabilities.
- The truck's braking system is effective and provides reliable stopping power, even when towing heavy loads.
- The Sierra 2500 HD offers a smooth and comfortable ride, both on and off the road.
- It features a functional and user-friendly dashboard layout, with easy-to-reach controls and gauges.
- The truck's exterior design is stylish and rugged, showcasing GMC's commitment to both form and function.
- The Sierra 2500 HD is praised for its reliability, with many owners reporting minimal mechanical issues.
- Fuel efficiency may vary, especially when towing or carrying heavy loads, so it's important to monitor fuel consumption during such tasks.
Maintenance Intervals, General Tips, and Common Issues:
► Follow the manufacturer's recommended maintenance schedule for oil changes, filter replacements, and other routine tasks.
► Regularly inspect and replace worn or damaged belts, hoses, and spark plugs.
► Keep the tires properly inflated and check for signs of wear regularly.
► Ensure proper lubrication of chassis components, including greasing fittings.
► Check and maintain proper fluid levels, including engine oil, coolant, and transmission fluid.
► Pay attention to brake pad wear and replace as necessary.
► Common issues may include transmission problems, such as slipping or rough shifting, which may require professional attention.
► Electrical issues, such as faulty wiring or malfunctioning sensors, can occur and should be addressed promptly by a qualified technician.
► Properly maintaining the cooling system is crucial to avoid overheating issues.
► It is recommended to address any abnormal engine noises, such as knocking or tapping, to prevent potential damage.
► Regularly inspect and clean the air intake system to ensure optimal performance and fuel efficiency.
Popular Tuning Tips and Modifications:
* Upgrading the exhaust system can improve performance and enhance the truck's exhaust note.
* Installing a cold air intake kit can increase airflow to the engine and potentially improve horsepower.
* Upgrading the suspension components, such as shocks and springs, can enhance ride quality and handling.
* Adding a performance tuner or programmer can optimize engine performance and allow for custom tuning.
* Upgrading to larger wheels and tires can improve off-road capabilities and enhance the truck's appearance.
* Consider adding a bed liner or tonneau cover to protect the truck bed and cargo.
Available Accessories, Attachments, and Aftermarket Options:
■ Tow hitches and trailer brake controllers for enhanced towing capabilities.
■ Bed extenders and cargo management systems for increased cargo-carrying options.
■ Running boards or side steps for easier access to the cab and bed.
■ Performance air filters and intake kits for improved airflow.
■ Upgraded audio systems, including speakers and subwoofers, for enhanced entertainment.
■ Bed covers, including tonneau covers and camper shells, for added protection and storage options.
■ Off-road accessories, such as skid plates, brush guards, and auxiliary lighting, for rugged adventures.
■ Appearance accessories, including chrome accents, grille inserts, and window visors, for customization.
Owner Reviews and Opinions:
☺ Strengths: Powerful engine, towing and hauling capabilities, comfortable interior, and rugged durability.
☻ Weaknesses: Fuel efficiency could be improved, large turning radius, and limited maneuverability in tight spaces.
Owners appreciate the Sierra 2500 HD's towing capacity and reliability for heavy-duty tasks.
The truck's Vortec engine is praised for its power and torque, making it suitable for demanding applications.
Many owners appreciate the spacious interior and comfortable seating for long drives.
The Sierra 2500 HD is often commended for its strong build quality and ability to withstand rough conditions.
Some owners have reported issues with electrical components and transmission performance, requiring repairs or replacements.
The truck's size and weight may pose challenges in urban environments or parking situations.
Repairs Frequently Needed and Parts That Often Break:
→ Transmission repairs or replacements, including torque converter issues.
→ Electrical system repairs, such as faulty wiring or sensor failures.
→ Suspension component replacements, including shocks and control arms.
→ Brake system repairs, including brake pads and rotors.
→ Cooling system repairs, such as radiator or water pump replacements.
→ Fuel system repairs, including fuel pump or injector replacements.
→ Exhaust system repairs, including catalytic converter replacements.
→ Power steering system repairs, such as pump or hose replacements.
→ Ignition system repairs, including ignition coil or spark plug wire replacements.
→ HVAC system repairs, including A/C compressor or blower motor replacements.
→ Body and trim repairs, such as door handle or mirror replacements.
Click the download button to access the comprehensive shop manual for your GMC, providing detailed instructions for repairs and maintenance. Once your payment is complete, you will find the official GMC OEM shop manual and parts list download link on the checkout page. Additionally, we will promptly email you the payment and download information.