🏷️ Basic Information

Make:

Chevrolet

Model:

C3500

Year:

1990

Chassis Code:

GMT400

Platform:

GMT400

👋 Introduction

Market Position:

The Chevrolet C3500 of 1990 represented a robust and versatile half-ton, three-quarter-ton, and one-ton pickup truck, popular for commercial use, towing, and heavy-duty hauling. This manual caters to owners and technicians seeking detailed repair and maintenance information for this specific generation.

Competitive Analysis:

Competed directly with Ford F-Series and Dodge Ram trucks of the same era. The GMT400 platform represented a significant modernization over previous generations, offering improved comfort and performance, thus requiring specialized service information.

Key Features:

Licensed OE materials, comprehensive coverage, digital accessibility, DIY-friendly interface, detailed diagrams and procedures.

📋 Manual Details

Coverage Areas:

Engine, Transmission, Drivetrain, Brakes, Steering, Suspension, Electrical System, HVAC, Body, Chassis, Troubleshooting

Page Count:

Extensive (Specific number not provided in source, implies comprehensive coverage)

Manual Type:

Service and Repair Manual Software

Language:

English

Format:

PDF Download (Software/Online Access)

📖 Manual Coverage

Engine Mechanical:

Engine assembly, cylinder heads, piston rings, crankshaft, camshaft, timing systems, lubrication system, cooling system

Engine Performance:

Fuel injection system (TBI, MPI), ignition system, emission controls, engine diagnostics

Transmission Manual:

Clutch, manual transmission overhaul, gear shifting mechanisms

Transmission Automatic:

Automatic transmission overhaul, hydraulic control systems, torque converter

Drivetrain:

Rear axle, driveshaft, universal joints, wheel bearings

Brakes:

Front disc brakes, rear drum brakes, parking brake system, hydraulic system, ABS (if equipped)

Steering:

Power steering system, steering column, steering gear/rack and pinion

Suspension:

Front independent suspension (I-beam axle or torsion bar depending on configuration), rear leaf springs, shock absorbers, ball joints, control arms

Electrical System:

Battery, charging system (alternator), starting system (starter), lighting system, instrumentation, power accessories, wiring diagrams

HVAC:

Heating, ventilation, and air conditioning (HVAC) system components, refrigerant, climate control panel

Body And Chassis:

Frame, body panels, doors, windows, interior trim, bumpers, tailgate/tailgate assist

Maintenance Procedures:

Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspections and replacement, brake pad replacement, tire rotation

Repair Procedures:

Engine rebuilds, transmission repairs, brake system overhauls, suspension component replacement, electrical diagnostics and repair, HVAC system repairs

Troubleshooting:

Diagnostic charts, symptom-based troubleshooting, common problem diagnosis and repair

Technical Data Access:

Torque specifications, clearances, alignment data, electrical schematics, diagnostic trouble codes (DTCs)

Technical Depth:

Comprehensive, covering basic maintenance to complete engine and transmission rebuilds. Includes diagnostic procedures and detailed component removal/installation.

📊 Manual Specifications

File Format:

PDF

Print Quality:

High-resolution, digitally sourced from OE materials, ensuring clarity of diagrams and text.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

Searchability:

Searchable text for quick information retrieval.

Compatibility:

Compatible with PC, laptop, smartphone, and tablet via web browser with internet connection.

Access Duration:

1 Year of access included, with discounts for extended periods.

⚙️ Engine Specifications

Engine Displacement 1:

4.3L (262 cu in) V6

Engine Code 1:

VIN R

Engine Type 1:

Vortec V6 (TBI - Throttle Body Injection)

Engine Displacement 2:

5.0L (305 cu in) V8

Engine Code 2:

VIN E

Engine Type 2:

Small-block V8 (TBI - Throttle Body Injection)

Engine Displacement 3:

5.7L (350 cu in) V8

Engine Code 3:

VIN K

Engine Type 3:

Small-block V8 (TBI - Throttle Body Injection)

Engine Displacement 4:

7.4L (454 cu in) V8

Engine Code 4:

VIN 5

Engine Type 4:

Big-block V8 (TBI - Throttle Body Injection)

Horsepower 4.3L V6:

Approx. 160 hp @ 4000 rpm

Torque 4.3L V6:

Approx. 230 lb-ft @ 2000 rpm

Horsepower 5.0L V8:

Approx. 175 hp @ 4000 rpm

Torque 5.0L V8:

Approx. 255 lb-ft @ 2400 rpm

Horsepower 5.7L V8:

Approx. 210 hp @ 4000 rpm

Torque 5.7L V8:

Approx. 300 lb-ft @ 2400 rpm

Horsepower 7.4L V8:

Approx. 230 hp @ 3600 rpm

Torque 7.4L V8:

Approx. 380 lb-ft @ 2000 rpm

Fuel System Type:

Throttle Body Injection (TBI) for all gasoline engines.

🔧 Transmission

Transmission Standard 1:

4-speed manual (SM465 or NV4500 depending on application)

Transmission Optional 1:

4-speed automatic (700R4 / 4L60)

Transmission Optional 2:

4-speed heavy-duty automatic (4L80E for 3/4 and 1-ton models)

Drive Type:

Rear-wheel drive (RWD) or Four-wheel drive (4WD)

📐 Dimensions

Wheelbase Std:

130.0 inches (3302 mm)

Wheelbase Long:

155.5 inches (3950 mm)

Overall Length Std:

225.9 inches (5738 mm)

Overall Length Long:

251.4 inches (6386 mm)

Bed Length Std:

78.2 inches (1986 mm)

Bed Length Long:

97.5 inches (2477 mm)

Curb Weight Range:

Approx. 4,300 - 5,500 lbs (1950 - 2495 kg), varies by configuration

Gvw Range:

Approx. 6,000 - 9,600 lbs (2722 - 4354 kg), varies by application

🛡️ Safety Features

NHTSA Ratings:

NHTSA ratings for this era were less standardized than today. Specific ratings for 1990 C3500 are generally unavailable or limited.

Active Features:

Anti-lock Braking System (ABS) available on rear wheels, potentially four-wheel ABS on some models.

Passive Features:

Lap and shoulder belts, high-strength steel frame construction, dual-pane side windows for reduced road noise (some models).

💡 Technology Features

Infotainment:

Basic AM/FM radio, cassette player, optional CD player. Analog gauges and controls. Limited digital integration by modern standards.

Driver Assistance:

Limited driver assistance features by today's standards. Primarily focused on ABS on some models.

Connectivity:

No integrated connectivity features like Bluetooth or smartphone integration. Basic antenna for radio reception.

🔧 Maintenance

Oil Change Interval:

Recommended every 3,000-5,000 miles (4,800-8,000 km) or 6 months, depending on driving conditions. Consult the manual for specific OE recommendations.

Transmission Fluid Interval:

Automatic transmission fluid (ATF) typically recommended for change/flush every 30,000-60,000 miles (48,000-96,000 km). Manual transmission fluid service varies. Check manual.

Coolant Interval:

Engine coolant (typically ethylene glycol based) recommended for replacement every 30,000-50,000 miles (48,000-80,000 km) or 2-3 years.

Engine Oil Spec:

API Service SG or SH. Viscosity varies by temperature: 10W-30 is common, but 5W-30 or 10W-40 may be specified for certain conditions. Consult manual for exact specs.

Transmission Fluid Automatic:

Dexron II or equivalent for 700R4/4L60. Dexron III for 4L80E. Consult manual for precise specification.

Transmission Fluid Manual:

GL-4 or GL-5 gear oil, depending on transmission type. Consult manual for specific grade and viscosity.

Coolant Spec:

Ethylene Glycol antifreeze, typically a 50/50 mixture with distilled water.

Brake Fluid Spec:

DOT 3 brake fluid.

Power Steering Fluid Spec:

ATF Dexron II or equivalent.

Known Issues:

Common issues can include worn intake manifold gaskets (leading to vacuum leaks), fuel pump failures, power steering pump leaks, radiator leaks, and transmission hard shifting or slipping (especially with older automatics). ABS sensor issues may also arise.

📚 Vehicle History

Brand Heritage:

Chevrolet has a long-standing reputation for producing durable and capable pickup trucks, dating back to the early 20th century. The C/K line has been a cornerstone of American automotive utility.

Model Evolution:

The 1990 C3500 is part of the GMT400 platform, which debuted for the 1988 model year for C/K pickups. This generation introduced a more aerodynamic and modern design compared to its predecessors, along with a more refined interior and improved chassis dynamics.

Production Years:

GMT400 platform: 1988-1998 (though some heavy-duty models continued longer with variations).

Manufacturing Locations:

Primarily manufactured in North America (USA, Mexico, Canada).