Target Audience:
DIYers, independent repair shops, fleet maintenance
Advantage Over Printed Manuals:
Instant access, convenience, searchability, potentially lower cost than OE printed manuals
Licensing:
Officially licensed, derived from OE materials
Access Duration:
One year of access with discounts for renewal
Software Provider:
RepairSurge
Coverage Type:
Comprehensive Service and Repair
Specific Models Covered:
1990 GMC C2500 Pickup Truck
Page Count Estimate:
Extensive (Specific count not provided, but typical for OE service manuals)
Manual Type:
Digital Service and Repair Manual Software
Format:
Online Software/Web-based Access
Engine Systems:
Engine mechanical, lubrication, cooling, fuel, ignition, exhaust, emissions control, engine diagnostics
Drivetrain Systems:
Manual transmission, automatic transmission, transfer case (if applicable), drive axles, propeller shafts, differentials
Suspension Steering:
Front suspension, rear suspension, steering gear, power steering system, wheel alignment
Braking Systems:
Front brakes (disc), rear brakes (drum or disc), parking brake, hydraulic system, anti-lock braking system (if equipped)
Electrical Systems:
Battery, charging system, starting system, ignition system, lighting, instruments and indicators, body electrical, powertrain control module (PCM) wiring diagrams
HVAC Systems:
Heating, ventilation, and air conditioning (HVAC) system diagnosis and repair
Body Chassis:
Body construction, doors, windows, interior trim, exterior trim, bumpers, frame, chassis components
Routine Maintenance:
Oil changes, filter replacements, fluid checks and changes, lubrication, tire rotation, spark plug replacement
Diagnostic Procedures:
Troubleshooting guides, diagnostic trouble codes (DTCs), symptom-based diagnostics
Repair Procedures:
Step-by-step repair instructions for all major systems
Overhaul Rebuild:
Engine overhaul, transmission overhaul, differential overhaul procedures
Depth Of Information:
Factory-level detail suitable for professional technicians and advanced DIY enthusiasts
Troubleshooting Capability:
Detailed troubleshooting charts, diagnostic flowcharts, component testing procedures
Access Method:
Web browser access via internet connection
Device Compatibility:
PC, laptop, smartphone, tablet
Printability:
Likely printable, though not a physical print product
Binding Type:
N/A (Digital Format)
Paper Type:
N/A (Digital Format)
Engine Options:
4.3L (262 ci) V6, 5.0L (305 ci) V8, 5.7L (350 ci) V8 (Throttle Body Injection or Multi-Port Fuel Injection depending on specific variant)
4.3L V6 Spec:
Code: L35, 90° OHV, Sequential Fuel Injection (TBI or CPI/CSFI)
5.7L V8 Spec:
Code: L05, 90° OHV, Throttle Body Injection (TBI) or Central Sequential Fuel Injection (CSFI/CPI)
Horsepower Range:
Approximately 160-200 HP (depending on specific engine and configuration)
Torque Range:
Approximately 230-300 lb-ft (depending on specific engine and configuration)
Fuel Delivery:
Throttle Body Injection (TBI) or Central Sequential Fuel Injection (CSFI/CPI) across various engine options
Body Styles:
Regular Cab, Extended Cab
Wheelbase Options:
117.7 inches (Regular Cab), 131.5 inches (Extended Cab), 164.5 inches (Long Bed)
Curb Weight Range:
Approx. 4,000 - 5,500 lbs (depending on configuration)
Gvw Range:
Up to 7,200 lbs (GVWR for C2500)
Safety Ratings Era:
1990s safety standards; specific NHTSA/IIHS ratings for this exact configuration are likely unavailable or dated.
Active Safety Features:
Anti-lock Braking System (ABS) - often optional on rear wheels or 4-wheel ABS on certain trims/engines
Passive Safety Features:
Lap and shoulder belts, padded dashboard, side door guard beams
Infotainment System Era:
Basic audio systems, typically AM/FM radio with cassette player or CD player on higher trims. No complex infotainment or touchscreens.
Driver Assistance Features:
Limited to ABS (optional). No advanced driver-assistance systems (ADAS) like adaptive cruise control or lane keeping assist.
Connectivity Features:
N/A (No integrated Bluetooth, Wi-Fi, or smartphone integration)
Oil Change Interval:
Typically every 3,000-7,500 miles or 6-12 months, depending on oil type and driving conditions.
Transmission Fluid Service:
Recommended every 30,000-60,000 miles for automatic transmissions, often with filter change.
Coolant Flush Interval:
Typically every 30,000-50,000 miles or 2-3 years.
Engine Oil Spec:
API Service SG, SF, or CD rated oil, viscosity typically 10W-30 or 10W-40 (check owner's manual for exact spec)
Coolant Spec:
Ethylene glycol based coolant (green), 50/50 mix with distilled water.
Brake Fluid Spec:
DOT 3 Brake Fluid
Common Engine Issues:
TBI injector pulse issues, intake manifold gasket leaks (particularly on 4.3L V6), distributor gear wear, exhaust manifold cracks.
Common Transmission Issues:
700R4/4L60 wear in 3-4 clutch pack, torque converter shudder.
Common Chassis Issues:
Ball joint wear, U-joint wear, rear spring sag, body rust (especially in salt-belt regions).
Common Electrical Issues:
Alternator failure, starter solenoid issues, body control module (BCM) related issues (though less complex than modern vehicles), instrument cluster problems.
Gm Truck Legacy:
GMC has a long-standing heritage in producing durable and capable trucks, dating back to the early 20th century.
Gmt400 Introduction:
The 1988 model year marked the introduction of the GMT400 platform, a significant redesign for GM's full-size trucks, offering improved aerodynamics, comfort, and engineering.
C2500 Positioning:
The C2500 is a 3/4-ton (Class 2) pickup truck, designed for heavier duty hauling and towing than the C1500.
Platform Production Years:
GMT400 platform production ran from 1988 to 2002 (with some overlap/variations).
