🏷️ Basic Information

Make:

GMC

Model:

C3500

Year:

1998

Product Type:

Service & Repair Manual Software

Third Generation Start Year:

1992

Third Generation End Year:

2000

Chassis Code:

GMT400 Platform

👋 Introduction

Target Audience:

DIY enthusiasts, independent repair shops, fleet maintenance

Advantage Over Print:

Instant access, searchability, cost-effectiveness compared to older print manuals

Accessibility:

Accessible from any internet-enabled device via web browser

Information Source:

Licensed OE materials ensure accuracy and authenticity

Developer:

RepairSurge

📋 Manual Details

Primary Coverage:

Comprehensive service and repair information for the 1998 GMC C3500

Secondary Coverage:

Includes detailed instructions for maintenance, diagnostics, repair, and troubleshooting

Estimated Page Count:

Extensive (specific count not provided, but indicative of factory-level detail)

Type:

Digital Service and Repair Manual Software

Language:

English

Format:

Online Access (Web Browser Compatible)

Access Duration:

1 Year

Device Compatibility:

PC, Laptop, Smartphone, Tablet

Licensing:

Officially Licensed, Derived from OE (Original Equipment) Materials

📖 Manual Coverage

Engine Mechanical:

Complete engine overhaul, diagnostics, and repair procedures

Engine Control System:

Fuel injection, ignition system, emissions control, ECM diagnostics

Transmission Manual:

Service and repair of manual transmissions

Transmission Automatic:

Service and repair of automatic transmissions

Drivetrain:

Front and rear axle, drive shafts, differentials, driveline components

Suspension:

Front and rear suspension components, alignment, shock absorbers, springs

Steering:

Power steering system, steering column, steering gear, tie rods

Brakes:

Hydraulic brake system, ABS, brake pads, rotors, lines, calipers

Electrical System:

Battery, charging system, starting system, lighting, instrument cluster

Body And Frame:

Body panels, doors, interior trim, frame diagnostics

Heating And Air Conditioning:

HVAC system components, refrigerant, diagnostics

Wiring Diagrams:

Detailed electrical schematics for all vehicle systems

Maintenance:

Oil changes, filter replacements, fluid checks, lubrication

Diagnostics:

Troubleshooting guides, diagnostic trouble codes (DTCs) interpretation

Repair:

Step-by-step repair instructions for all major components

Rebuilds:

Complete engine and transmission rebuild procedures

Component Replacement:

Detailed instructions for replacing parts such as alternators, starters, brake calipers, etc.

Adjustment:

Procedures for adjusting brakes, suspension, steering components

Depth:

Factory-level detail suitable for professional technicians and advanced DIYers

Troubleshooting Methodology:

Systematic approach to diagnosing problems

📊 Manual Specifications

Digital Format:

Web-based application, requires internet connection

Scalability:

Digital format allows for zooming and clear viewing on various screen sizes

Binding:

N/A (Digital)

Paper Quality:

N/A (Digital)

⚙️ Engine Specifications

Engine Options:

Typically included the 5.0L (305ci) V8 (Vortec 5000), 5.7L (350ci) V8 (Vortec 5700), and 7.4L (454ci) V8 (Vortec 7400)

Engine Codes Common:

LF6 (5.0L), L31 (5.7L), L29 (7.4L)

Horsepower 5.7L Estimate:

Approx. 255 hp @ 4600 rpm

Torque 5.7L Estimate:

Approx. 330 lb-ft @ 2800 rpm

Horsepower 7.4L Estimate:

Approx. 290-315 hp @ 4000 rpm

Torque 7.4L Estimate:

Approx. 410-450 lb-ft @ 3200 rpm

Fuel Delivery:

Multi-point Fuel Injection (MPFI) - Vortec Engines

Fuel Type:

Unleaded gasoline

🔧 Transmission

Standard Transmission Options:

Typically included a 4-speed automatic transmission (4L80-E for heavy-duty applications)

Optional Transmission Options:

Could also be equipped with a manual transmission (e.g., NV4500 5-speed for some configurations)

Automatic Features:

Electronic control, overdrive

📐 Dimensions

Body Styles:

Regular Cab, Extended Cab, Crew Cab

Bed Lengths:

6.5 ft, 8.0 ft

Gvwr Range:

Varies by configuration, commonly 7,200 lbs to 10,500 lbs (C3500 designation often implies heavier duty rating)

🛡️ Safety Features

Safety Features General:

Focus on structural integrity, anti-lock brakes (ABS)

ABS:

Standard on rear wheels, often optional or standard on all four wheels depending on configuration.

Airbags:

Driver-side airbag standard.

💡 Technology Features

Audio Systems:

Factory AM/FM radio, cassette player, optional CD player. Basic speaker systems.

ABS:

Anti-lock Braking System

OBD Ii Compliance:

Vehicle is OBD-II compliant for emissions diagnostics.

🔧 Maintenance

Oil Change Interval:

Typically 3,000 - 7,500 miles or 6-12 months, depending on driving conditions and oil type (refer to manual for specific recommendation).

Transmission Fluid Interval:

Every 30,000 - 60,000 miles or as indicated by severe service schedules.

Coolant Flush Interval:

Initial flush at 100,000 miles, then every 50,000 miles thereafter (or as per specific coolant type).

Engine Oil Specification:

API Certified SAE 5W-30 or 10W-30 viscosity grade, depending on temperature (refer to owner's manual for precise recommendation).

Transmission Fluid Specification:

Dexron III (or equivalent) for automatic transmissions.

Coolant Specification:

Ethylene glycol based coolant with demineralized water (50/50 mix), typically green color.

Common Problems:

Intake manifold gasket leaks, fuel pump issues, ABS sensor failures, tailgate issues, some electrical gremlins, catalytic converter failures, rear main seal leaks.

Vortec Engine Notes:

Vortec engines are generally robust but can be prone to spider injection system issues if not maintained properly.

📚 Vehicle History

Brand Focus:

GMC (General Motors Truck Company) historically focused on trucks and commercial vehicles.

Platform Heritage:

Part of the GMT400 platform, a significant redesign from previous generations, known for improved aerodynamics and ride quality.

Manufacturing Locations:

North America (various GM assembly plants)

🏆 Awards & Recognition

General Truck Awards:

While specific awards for the 1998 C3500 are not readily available, the GMT400 platform generally received positive reviews for its robust build and towing capabilities during its production run.