🏷️ Basic Information

Make:

GMC

Model:

K2500

Year:

1994

Model Code:

GMT400 platform (CK Series)

Generation Designation:

First Generation (GMT400)

Generation Years:

1988-1998 (for C/K trucks)

Engine Codes:

L29 (7.4L V8), LP4 (5.0L V8), LP5 (5.7L V8)

Transmission Codes:

NV4500 (5-speed manual), 4L80E (4-speed automatic), 4L60E (4-speed automatic - typically for 1500, but relevant for context)

👋 Introduction

Market Position:

Essential repair and maintenance resource for 1994 GMC K2500 owners and technicians. Positioned as a convenient and up-to-date alternative to traditional printed manuals.

Competitive Analysis:

Offers a digital advantage over older, potentially outdated printed manuals. Competes with other digital repair manual providers and physical workshop manuals. Key advantages include accessibility, searchability, and licensing from OE (Original Equipment) sources.

Key Features:

Officially licensed OE material, instant online access, comprehensive coverage, user-friendly interface, cross-device compatibility, regular updates (implied by software nature), cost-effective compared to professional labor.

📋 Manual Details

Coverage Areas:

Engine, Drivetrain, Suspension, Steering, Brakes, Electrical System, HVAC, Body & Chassis, Fuel System, Cooling System, Emission Controls, Diagnostics, Troubleshooting, Maintenance

Page Count:

Extensive (specific count not provided, but implied to be comprehensive, equivalent to factory service manual)

Manual Type:

Service and Repair Manual Software

Language:

English

Format:

Online Software (web-browser accessible)

📖 Manual Coverage

Systems Covered:

Engine mechanical and electrical diagnostics, transmission repair (automatic and manual), power transfer case operation and repair, front and rear axle service, steering system components, brake system (ABS, non-ABS), suspension geometry and component replacement, body electrical (lighting, power windows, locks), climate control (HVAC), fuel delivery and evaporative emission systems, cooling system, exhaust system, ignition system, starting and charging systems, diagnostic procedures for all major systems.

Procedures Included:

Routine maintenance (oil changes, filter replacements, fluid checks), scheduled maintenance intervals, component removal and installation, diagnostic troubleshooting trees, electrical wiring diagrams, torque specifications for all fasteners, overhaul procedures for major components, AC system servicing, brake bleeding and component replacement, suspension alignment procedures, engine tune-up specifications, troubleshooting common drivability issues.

Technical Depth:

Comprehensive from basic maintenance to advanced diagnostics and component overhaul. Covers factory-level repair and diagnostic procedures. Includes detailed specifications and procedures necessary for professional-level repairs and DIY enthusiasts.

📊 Manual Specifications

File Format:

Proprietary Software (Web-based access)

Print Quality:

N/A (Digital format, not printed)

Binding Type:

N/A (Digital format, not printed)

Paper Type:

N/A (Digital format, not printed)

Access Duration:

1 Year (with discounts for renewal)

Device Compatibility:

PC, Laptop, Smartphone, Tablet (requires internet connection and web browser)

⚙️ Engine Specifications

Primary Engine:

5.7L V8 (LP5) 'Vortec' Small Block

Engine Options:

5.0L V8 (LP4), 7.4L V8 (L29 - Big Block)

Horsepower 5.7L:

Approx. 205 hp @ 4000 rpm

Torque 5.7L:

Approx. 300 lb-ft @ 2400 rpm

Horsepower 7.4L:

Approx. 230 hp @ 3600 rpm

Torque 7.4L:

Approx. 385 lb-ft @ 2400 rpm

Fuel System:

Electronic Fuel Injection (EFI)

Ignition System:

Distributor-based, Electronic Ignition (EST)

Cooling System:

Pressurized, liquid-cooled

Emission Controls:

Catalytic converter, EGR (Exhaust Gas Recirculation), PCV (Positive Crankcase Ventilation), Evaporative Emission Control (EVAP) system

🔧 Transmission

Standard Transmission:

4-speed Automatic (e.g., 4L60E for lighter duty, 4L80E for heavier duty)

Optional Transmission:

5-speed Manual (NV4500)

Features Automatic:

Electronic control, overdrive, torque converter lock-up

Features Manual:

Heavy-duty design, synchronized gears, direct drive fifth gear

Automatic Transmission Fluid:

Dexron-III (or equivalent)

Manual Transmission Fluid:

API GL-4 or GL-5, SAE 75W-90 or 80W-90 (refer to manual for specific NV4500)

📐 Dimensions

Exterior Wheelbase:

131.5 inches (for standard bed Crew Cab/Extended Cab variants)

Exterior Length:

Varies by cab and bed configuration (e.g., approx. 230-250 inches)

Exterior Width:

Approx. 79.1 inches

Exterior Height:

Approx. 73.4 inches

Weights Gvwr:

Typically 7,000 - 8,600 lbs (depending on configuration)

Weights Curb:

Varies by configuration (e.g., 4,500 - 5,500 lbs)

Cargo Bed Length:

8 ft (standard) or 6.5 ft (optional short bed)

🛡️ Safety Features

Safety Ratings:

NHTSA ratings for 1994 models would vary; generally less comprehensive than modern standards. Focus on structural integrity and basic safety equipment.

Active Features:

Four-wheel anti-lock braking system (ABS) often optional or standard on higher trims/4x4 models.

Passive Features:

Seat belts (lap and shoulder belts for front occupants), reinforced frame, dual-pane side windows (on some models), driver's side airbag (became more common in the mid-90s, check specific vehicle).

💡 Technology Features

Infotainment:

Basic AM/FM radio, cassette player, optional CD player. Manual climate controls. No advanced infotainment systems like touchscreens or navigation.

Driver Assistance:

Limited. Primarily features like cruise control (if equipped) and ABS (optional).

Connectivity:

No modern connectivity features such as Bluetooth, USB ports, or smartphone integration.

Diagnostics:

OBD-I (On-Board Diagnostics, First Generation) system. Requires specific diagnostic tools and procedures, unlike modern OBD-II systems.

🔧 Maintenance

Service Intervals Oil:

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

Service Intervals Filters:

Oil filter with every oil change. Air filter and fuel filter typically every 15,000 - 30,000 miles.

Fluid Specifications Coolant:

50/50 mix of ethylene glycol antifreeze and distilled water (e.g., Dexcool was introduced later, so likely a green silicate-based coolant for 1994).

Fluid Specifications Brake:

DOT 3 brake fluid.

Fluid Specifications Power Steering:

ATF Dexron-II or Dexron-III.

Known Issues:

Potential for intake manifold gasket leaks (Vortec V8s), distributor/rotor wear, fuel pump issues, exhaust manifold leaks, window regulator failures, ABS sensor failures, and rust on body panels.

Spark Plugs:

For 5.7L V8 (LP5): AC Delco R44LTS or equivalent. Gap: 0.060 inches. Replacement interval typically 30,000-60,000 miles. (Note: Vortec heads have unique plug design).

Oil Capacity 5.7L:

5 Quarts (with filter) of 5W-30 or 10W-30 (depending on climate; consult manual).

Oil Capacity 7.4L:

7 Quarts (with filter) of 10W-30.

📚 Vehicle History

Brand Heritage:

GMC (General Motors Company) has a long history of producing trucks and commercial vehicles, known for durability and work capability.

Model Evolution:

The K2500 is part of GMC's full-size pickup truck line. The 1994 model year falls within the first generation of the GMT400 platform, which marked a significant redesign with more aerodynamic styling and improved comfort.

Production Location:

Fort Wayne, Indiana, USA; Oshawa, Ontario, Canada

Production Years:

GMT400 platform C/K trucks produced from 1988 to 1998. 1994 is a mid-cycle model year.

🏆 Awards & Recognition

Recognitions:

GMC trucks of this era were generally recognized for their durability, towing capacity, and work-oriented features. Specific awards for the 1994 K2500 are not prominently documented but it was a strong contender in the heavy-duty pickup market.