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1990 GMC G1500 Service & Repair Manual Software

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🏷️ Basic Information Identification Make: GMC Model: G1500 Year: 1990 Codes Vehicle Chassis Code: GMT400 platform (specifically, the van/truck variant) 👋 Introduction Market Position Target Audience: DIY enthusiasts, independent repair...
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Type: Truck
Vendor:
Sku: 195542
1990 GMC G1500 Service & Repair Manual Software
🏷️ Basic Information
Identification
Make:
GMC
Model:
G1500
Year:
1990
Codes
Vehicle Chassis Code:
GMT400 platform (specifically, the van/truck variant)
👋 Introduction
Market Position
Target Audience:
DIY enthusiasts, independent repair shops, fleet maintenance technicians.
Competitive Analysis
Comparison To Print:
Offers superior convenience, searchability, and up-to-date access compared to older, potentially outdated printed manuals. Licensed OE data ensures accuracy.
Key Features
Licensing:
Officially licensed and derived from OE (Original Equipment) materials, ensuring accuracy and reliability.
Access Method:
Instant online access via internet connection and web browser across multiple devices.
Subscription Model:
Full year of access included, with discounts for extended access, providing ongoing value.
Software Provider:
RepairSurge, an automotive software company specializing in licensed repair information.
📋 Manual Details
Coverage Areas
Supported Regions:
North America (USA, Canada, Mexico)
Page Count
Estimated Page Count:
Variable (Online Digital Format - Effectively unlimited content access)
Manual Type
Type:
Online Service and Repair Manual Software
Language
Language:
English
Format
Format:
Web-based, accessible via browser on PC, laptop, smartphone, tablet
📖 Manual Coverage
Systems Covered
Powertrain:
Engine mechanical, fuel system, ignition system, cooling system, exhaust system, emissions control
Drivetrain:
Manual transmission, automatic transmission, transfer case (if applicable to G1500 variants), driveshafts, axles, differentials
Chassis:
Suspension (front and rear), steering system, braking system (front and rear discs/drums), wheels and tires
Electrical:
12V electrical system, battery, charging system (alternator), starting system (starter motor), lighting, instrumentation, body control modules, wiring diagrams, fuses and relays
HVAC:
Heating, ventilation, and air conditioning systems (components, operation, service)
Body And Interior:
Body panels, doors, windows, seats, interior trim, body hardware
Emissions Control:
Detailed coverage of emission control systems, including EGR, catalytic converter operation, and evaporative emission control (EVAP) systems.
Fuel System Details:
Fuel pump pressure testing, injector diagnostics, fuel filter replacement, fuel tank service.
Steering System Details:
Power steering pump, steering gear/rack and pinion, tie rod ends, steering linkage components.
Brake System Details:
Front disc brake overhaul (pads, rotors, calipers), rear drum brake service (shoes, drums, wheel cylinders), brake fluid bleeding, parking brake adjustment.
Cooling System Details:
Radiator service, water pump replacement, thermostat diagnosis and replacement, coolant hose inspection and replacement.
Procedures Included
Maintenance:
Scheduled maintenance intervals, fluid changes (oil, coolant, brake fluid, transmission fluid, differential fluid), filter replacements, lubrication
Diagnostics:
Troubleshooting common issues, diagnostic trouble codes (DTCs) interpretation (OBD-I era), component testing procedures
Repair:
Component removal and installation, component overhaul and rebuilding, adjustments, alignment procedures
Installation:
Installation procedures for specific aftermarket accessories (if covered by OE service information)
Wiring Diagrams:
Extensive electrical system wiring diagrams included, crucial for troubleshooting electrical faults.
Troubleshooting Charts:
Systematic troubleshooting charts and flowcharts to diagnose and resolve common vehicle problems.
Diagnostic Tools:
Guidance on using diagnostic tools relevant to the OBD-I system, including reading and interpreting diagnostic codes.
Technical Depth
Depth:
Comprehensive, covering from basic maintenance to major component overhaul and complex diagnostics.
Torque Specifications:
Detailed torque specifications for critical fasteners in engine, transmission, suspension, and brake systems.
📊 Manual Specifications
File Format
Digital Format Details:
Web-based application with searchable text, interactive diagrams, and clear navigation. Licensed OE data is rendered for user access.
Print Quality
Print Quality Implication:
Digital format offers scalability and clarity, superior to older printed manuals.
Binding Type
Binding Type:
N/A (Digital Format)
Paper Type
Paper Type:
N/A (Digital Format)
Content Source
Data Origin:
Licensed OE (Original Equipment) service and repair information from the manufacturer.
⚙️ Engine Specifications
Primary Engine
Engine Options:
Likely 4.3L (262 cu in) V6 (VIN 'Z' or 'W'), 5.0L (305 cu in) V8 (VIN 'E'), 5.7L (350 cu in) V8 (VIN 'K'). Specific engine availability depends on G1500 configuration (van/truck).
Performance
Horsepower Torque Details:
Varies by engine. The 4.3L V6 typically produced around 160-165 hp and 230-235 lb-ft torque. V8 options offered higher output. Precise figures require VIN lookup.
Engine Variations Notes:
The specific engine and transmission options could vary considerably based on the body style (e.g., short wheelbase van vs. long wheelbase cargo van or passenger van) and original intended use. VIN decoding is essential for precise specifications.
Fuel System
Fuel Delivery:
Throttle Body Injection (TBI) for most 1990 models, potentially Multi-Port Fuel Injection (MPFI) on some V8 variants.
Ignition System
Ignition Type:
Electronic Ignition (EST - Electronic Spark Timing), Distributor-based.
Cooling System
Coolant Type:
Ethylene Glycol based antifreeze (typically a 50/50 mix with distilled water). Refer to manual for specific GM specification (e.g., DEX-COOL predecessor).
Engine Oil
Recommended Oil Viscosity:
Likely SAE 10W-30 or 5W-30, depending on ambient temperature. Verify with manual for specific engine.
Oil Capacity:
Typically 4.5 - 5 quarts (4.3 - 4.7 liters) with filter for V6, and 5 quarts (4.7 liters) for V8. Consult manual for exact capacity based on engine.
🔧 Transmission
Standard
Standard Transmission Type:
4-speed Manual Transmission (e.g., NV3500 or similar) may have been an option on some G1500 configurations.
Optional
Optional Transmission Type:
3-speed THM700R4 (4L60) or 4-speed 4L60-E automatic transmission likely standard or optional depending on engine and configuration.
Features
Automatic Transmission Fluid:
GM DEXRON®-III (or equivalent) automatic transmission fluid. Verify capacity in manual.
📐 Dimensions
Exterior
Wheelbase Options:
Variable depending on body style (e.g., van chassis length, truck wheelbase). G1500 van typically offered multiple wheelbase options.
Body Styles:
Panel Van, Passenger Van, potentially Chassis Cab for specialized upfitting.
Weights
Gross Vehicle Weight Rating Gvwr:
Varies significantly by configuration. G1500 models are typically in the 3/4 ton classification range, with GVWRs often between 5,500 - 7,200 lbs (2,495 - 3,266 kg).
Curb Weight:
Highly variable based on body style, engine, and equipment. Expect curb weights to range from approximately 3,800 - 4,500 lbs (1,724 - 2,041 kg).
Payload Capacity:
Varies by configuration, but G1500 models are designed for substantial payload. Refer to vehicle's door jamb sticker or manual for exact figures.
🛡️ Safety Features
Ratings
Crash Test Information:
NHTSA and IIHS ratings for 1990 vehicles are generally less comprehensive than modern standards. The manual will detail any available safety system information.
Active Features
Antilock Braking System ABS:
Optional on rear-wheel drive models, standard on some configurations or later production runs. ABS system components covered.
Passive Features
Seat Belts:
Front lap and shoulder belts, possibly rear seat belts depending on configuration.
💡 Technology Features
Infotainment
Audio System:
AM/FM stereo radio, cassette player, and potentially CD player options depending on trim level. Speaker configurations varied.
Driver Assistance
Cruise Control:
Optional feature, controlled by stalk on steering column or dashboard buttons.
Connectivity
Diagnostics Interface:
OBD-I (On-Board Diagnostics I) compliant. Manual will cover diagnostic procedures and common sensor locations.
🔧 Maintenance
Service Intervals
Engine Oil Change Interval:
Typically 3,000 - 5,000 miles (4,800 - 8,000 km) or 3-6 months, whichever comes first. Refer to manual for specific recommendation based on driving conditions.
Transmission Fluid Change Interval:
Typically 30,000 - 60,000 miles (48,000 - 96,000 km) for automatic transmissions, or as specified by severe service conditions. Manual transmission fluid changes also specified.
Coolant Flush Interval:
Typically every 24,000 - 30,000 miles (38,000 - 48,000 km) or 2 years, depending on coolant type.
Spark Plug Replacement Interval:
Typically 30,000 miles (48,000 km) for conventional spark plugs, or longer if platinum/iridium plugs were factory-equipped (less common in 1990).
Fluid Specifications
Power Steering Fluid:
GM Power Steering Fluid or Dexron® type fluid. Refer to manual for specific OE specification.
Brake Fluid:
DOT 3 brake fluid (meeting SAE J1703 or FMVSS 116 standards).
Transmission Type Specific Fluid:
For 4L60/4L60-E automatic transmissions, DEXRON®-II E or DEXRON®-III automatic transmission fluid is specified. Manual transmissions use GL-4 gear oil (e.g., 75W-90 or 80W-90).
Known Issues
Common G1500 Issues 1990:
Potential for vacuum line leaks, fuel pump issues, aging electrical components (corrosion on connectors), suspension wear (ball joints, bushings), exhaust manifold leaks on V8 engines, and transmission solenoid issues in automatics.
Filter Part Numbers
Oil Filter Example:
AC Delco PF25, Fram PH8A, WIX 51515 (Verify application for specific engine).
Air Filter Example:
AC Delco A218C, Fram CA3028 (Verify application for specific engine).
📚 Vehicle History
Brand Heritage
Gmc Legacy:
GMC (General Motors Company) has a long history of producing trucks, vans, and commercial vehicles, known for durability and utility.
Model Evolution
G1500 Platform:
The G1500 was part of the Chevrolet/GMC full-size van lineup (G-series, colloquially known as 'G-Body' vans). For 1990, these were part of the GMT400 generation, transitioning from the older G-Van platform.
Production
Manufacturing Location:
Typically assembled in the United States.
🏆 Awards & Recognition
Recognitions
Vehicle Awards 1990:
Specific industry awards for the 1990 G1500 are not prominently documented in general historical records, but GMC vans of this era were generally regarded as robust work vehicles.
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