🏷️ Basic Information

Make:

Chevrolet

Model:

G30

Year:

1994

Vehicle Type:

Full-size Van / Chassis Cab

Chassis Code:

GMT400 (shared with C/K pickups)

👋 Introduction

Market Position:

The 1994 Chevrolet G30 represented a robust and versatile platform in the full-size van segment, commonly used for commercial purposes, passenger transport (e.g., conversion vans), and specialized applications. This manual targets owners and technicians seeking to maintain or repair these workhorses.

Competitive Analysis:

Competed against vehicles like the Ford Econoline and Dodge Ram Van. Its strength lay in its robust construction, availability of powerful V8 engines, and the extensive aftermarket support for customization and work-specific configurations.

Key Features:

Licensed OE information, digital convenience, comprehensive coverage, lifetime access (with discount for renewal), PC/laptop/smartphone/tablet compatibility.

📋 Manual Details

Coverage Areas:

Full Vehicle Service and Repair

Page Count:

Estimated 1000+ pages (typical for comprehensive service manuals of this era, exact count not provided in product description but implied by scope)

Manual Type:

Service and Repair Manual Software

Source Material:

Licensed information derived from OE (Original Equipment) materials, ensuring accuracy and factory-level detail.

Language:

English

Format:

Digital Download (PDF)

📖 Manual Coverage

Systems Covered:

Engine Mechanical, Fuel System, Ignition System, Cooling System, Exhaust System, Lubrication System, Emission Controls, Automatic Transmission, Manual Transmission, Drivetrain (RWD/4WD), Axles, Suspension (Front & Rear), Steering System, Brakes (Front & Rear, ABS), Electrical System (Wiring Diagrams, Charging System, Starting System, Lighting, Accessories), Climate Control (HVAC), Body & Frame, Interior Components, Exterior Components, Diagnostic Procedures

Electrical System Detail:

Comprehensive wiring diagrams for all major systems, including engine control, lighting, power windows/locks (if equipped), HVAC controls, and accessory circuits.

Procedures Included:

Routine Maintenance, Scheduled Maintenance, Troubleshooting, Component Removal & Installation, Repair Procedures, Overhaul Procedures, Diagnostic Testing, Electrical System Diagnosis, Component Adjustment, System Bleeding (Brakes, Cooling), Wheel Alignment Specifications, Torque Specifications, Wiring Harness Repair, Body Panel Repair

Diagnostic Procedures Detail:

Detailed diagnostic flowcharts for common drivability and electrical issues, including specific test procedures for sensors and actuators. OBD-I diagnostic trouble codes (DTCs) for relevant systems.

Technical Depth:

Comprehensive: Covers from basic fluid changes and inspections to complete engine and transmission rebuilds, detailed electrical troubleshooting, and chassis component overhauls. Suitable for professional technicians and experienced DIYers.

📊 Manual Specifications

File Format:

PDF

Searchability:

Likely text-searchable PDF, allowing users to quickly find specific topics or components.

Print Quality:

High Resolution, Printable

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Primary Engine:

4.3L (262 cu in) V6 'Vortec' OHV

Engine Code V6:

L35

V6 Horsepower:

Approx. 160-165 hp @ 4000 rpm (varies slightly by configuration)

V6 Torque:

Approx. 230-235 lb-ft @ 2400 rpm (varies slightly by configuration)

Optional Engine 1:

5.0L (305 cu in) V8 'Vortec' OHV

Engine Code V8 5 0:

L30

V8 5 0 Horsepower:

Approx. 175-180 hp @ 4000 rpm

V8 5 0 Torque:

Approx. 250-255 lb-ft @ 2400 rpm

Optional Engine 2:

5.7L (350 cu in) V8 'Vortec' OHV

Engine Code V8 5 7:

L31

V8 5 7 Horsepower:

Approx. 200-205 hp @ 4000 rpm

V8 5 7 Torque:

Approx. 300-310 lb-ft @ 2400 rpm

Optional Engine 3:

6.5L (395 cu in) Turbocharged Diesel V8

Engine Code Diesel:

L65 (Naturally Aspirated) / L31 Turbo Diesel (Later variants may have this)

Diesel Horsepower:

Approx. 190 hp @ 3400 rpm (Turbocharged)

Diesel Torque:

Approx. 385 lb-ft @ 1700 rpm (Turbocharged)

Fuel System:

Electronic Fuel Injection (EFI), Sequential Port Injection (SPI) for Vortec engines.

Fuel Type:

Unleaded Gasoline (87 octane recommended for V6/V8), Diesel Fuel (for diesel models)

Cooling System:

Pressurized liquid cooling system with engine-driven fan or optional electric fan.

Ignition System:

Distributorless Ignition System (DIS) with individual coil packs for Vortec engines, or traditional distributor with electronic ignition for earlier models/non-Vortec. Diesel uses glow plugs.

🔧 Transmission

Standard Transmission:

4-Speed Automatic (e.g., 4L60-E for gasoline engines)

Optional Transmission:

5-Speed Manual (e.g., NV4500 Heavy Duty Manual for diesel and some V8 applications)

Transmission Features:

Available in RWD and 4WD configurations. Overdrive gears for fuel efficiency on automatic transmissions.

📐 Dimensions

Wheelbase Options:

Multiple, typically 117.5" (short) and 135.5" (long), with even longer options for chassis cab models.

Overall Length:

Varies significantly by configuration (short/long wheelbase, cargo vs. passenger). Example: Long wheelbase passenger van approx. 224 inches.

Exterior Width:

Approx. 79.1 inches

Exterior Height:

Approx. 81.4 inches

Cargo Volume:

Varies significantly by wheelbase and configuration. Long wheelbase models offer substantial cargo space.

Curb Weight:

Typically 4,500 - 5,500 lbs, depending on configuration and engine.

Gross Vehicle Weight Rating Gvwr:

Ranges from approx. 6,200 lbs to 10,000+ lbs (G30 designation indicates 3/4 ton or 1-ton capacity, depending on specific sub-model).

🛡️ Safety Features

Safety Ratings:

NHTSA ratings for this era are typically basic. Focus on structural integrity for commercial use.

Active Features:

Optional Anti-lock Braking System (ABS) on rear wheels or all wheels.

Passive Features:

Seat belts, reinforced body structure.

💡 Technology Features

Infotainment Features:

Basic AM/FM radio, optional cassette player, or CD player. Manual controls for HVAC and audio.

Driver Assistance Features:

Limited. ABS was an option. No advanced electronic driver aids were common.

Connectivity Features:

None in the modern sense. Basic wiring for optional accessories.

🔧 Maintenance

Oil Change Interval:

Every 3,000-5,000 miles or 6 months, depending on driving conditions (refer to manual for specifics).

Transmission Service Interval:

Every 30,000-60,000 miles or as specified by the manual, including fluid and filter change.

Coolant Flush Interval:

Every 30,000-50,000 miles or 2-3 years.

Engine Oil Type:

API Service SG or SH, SAE 5W-30 or 10W-30 (refer to manual for precise viscosity based on temperature).

Transmission Fluid Type Auto:

Dexron-III Automatic Transmission Fluid (ATF)

Transmission Fluid Type Manual:

API GL-4 or GL-5 Gear Oil (specific viscosity based on transmission model, e.g., SAE 75W-90 or 80W-90)

Coolant Type:

Ethylene Glycol based, green color, 50/50 mix with distilled water.

Brake Fluid Type:

DOT 3 Hydraulic Brake Fluid

Known Issues:

Common issues can include: Vortec engine intake manifold gasket leaks, fuel pump failures, transmission cooler line leaks, ABS sensor failures, exhaust manifold leaks, and potential body rust on older units.

📚 Vehicle History

Brand Heritage:

Chevrolet has a long-standing reputation for producing durable and versatile trucks and vans, with the G-series vans being a staple for decades.

Model Evolution:

The 1994 G30 is part of the third generation of Chevrolet vans, introduced for the 1995 model year, sharing its chassis and many components with the GMT400 platform pickup trucks. This marked a significant update in design, technology, and safety from previous generations.

Model Designation Meaning:

G-Series vans were Chevrolet's full-size van line. The '30' in G30 typically denoted a 1-ton GVWR chassis, indicating a heavier-duty payload capacity compared to G10 or G20 models.

Production Years:

The GMT400 platform (which the '95+ vans are based on) was produced from 1995 onwards. The '94 model year is the final year of the previous generation G-series vans, often referred to as the 'G20/G30' prior to the '95 redesign. However, the product description clearly states 1994, implying it covers the final production run of the prior generation or early introduction of the new generation if the update was staggered.

Manufacturing Location:

Likely United States (e.g., Baltimore, Maryland Assembly Plant)