🏷️ Basic Information

Make:

Chevrolet

Model:

C/K

Year:

1999

Platform:

GMT800

Body Styles Covered:

Light Duty Pickup Trucks (C/K 1500, 2500), Heavy Duty Pickup Trucks (C/K 2500HD, 3500), Chassis Cab, Suburban, Tahoe, Yukon

Vin Code First Digit:

1

Vin Code Eighth Digit:

Vehicle specific engine code

👋 Introduction

Segment:

Full-size pickup truck and SUV.

Brand Perception:

Known for ruggedness, towing capability, and versatility.

Key Competitors:

Ford F-Series, Dodge Ram.

Vehicle Highlights:

GMT800 platform introduced a significant redesign, offering improved ride comfort, interior space, and a wider range of powertrain options.

Manual Value Proposition:

Authentic dealership-level repair information, crucial for accurate diagnostics and repairs on this generation of trucks.

📋 Manual Details

Overall Coverage:

All Models & All Repairs A-Z

Specific Models Covered:

Chevrolet C1500, C2500, C3500, K1500, K2500, K3500; GMC Sierra C/K 1500, 2500, 3500; Chevrolet Suburban, Tahoe; GMC Yukon

Estimated Page Count:

2000+

Type:

Factory Service Manual

Language:

English

Format:

Printed Book

📖 Manual Coverage

Powertrain:

Engine mechanical, fuel system, ignition system, lubrication system, cooling system, exhaust system, engine control system (ECM/PCM), automatic transmission (4L60E, 4L80E), manual transmission (NV3500, NV4500, NV5600), transfer case (NP233, NP241, NP243, NP246)

Chassis:

Suspension (front independent, rear solid axle), steering system, brake system (ABS, disc, drum), wheels, tires, chassis components

Electrical:

Battery, charging system, starting system, lighting, instruments, accessories, body control modules (BCM), power windows, power locks, mirrors, climate control, audio systems, trailer wiring

Body:

Body construction, exterior trim, interior trim, doors, windows, seats, airbags, HVAC system, body exterior/interior repairs, paint and coatings

Maintenance:

Scheduled maintenance, fluid changes, filter replacements, inspections, lubrication

Diagnostics:

Troubleshooting charts, symptom-based diagnostics, DTC (Diagnostic Trouble Code) interpretation, electrical system diagnostics, HVAC diagnostics

Repair:

Component removal and installation, overhaul procedures, adjustments, system repairs, body panel repairs, electrical component replacement

Specifications And Tolerances:

Torque specifications, clearances, alignment data, electrical resistance values, pressure specifications

Depth:

Comprehensive: Covers basic maintenance to full engine and transmission rebuilds, advanced electrical diagnostics, and body repair.

Target Audience:

Professional Technicians, Advanced DIYers

📊 Manual Specifications

Format Type:

Printed Book

Print Quality:

High-quality professional printing with clear diagrams and text.

Binding:

Durable binding (likely stitched and glued or spiral bound for lay-flat use)

Paper Type:

Heavy-duty paper stock, resistant to shop grease and wear.

Illustrations Type:

Line drawings, exploded views, wiring diagrams, diagnostic flowcharts.

⚙️ Engine Specifications

Engine Options Listed In Manual:

4.3L V6 (Vortec 4300 L35), 4.8L V8 (Vortec 4800 LR4), 5.0L V8 (Vortec 5000 L30), 5.7L V8 (Vortec 5700 L31), 6.0L V8 (Vortec 6000 LQ4 - Heavy Duty), 6.5L V8 Turbo Diesel (L65)

4.3L V6 Horsepower:

Approx. 200 hp @ 4400 rpm

4.3L V6 Torque:

Approx. 260 lb-ft @ 2800 rpm

5.7L V8 Horsepower:

Approx. 255 hp @ 4600 rpm

5.7L V8 Torque:

Approx. 330 lb-ft @ 2800 rpm

Fuel Delivery:

Sequential Fuel Injection (SFI)

Fuel Type:

Unleaded Gasoline (87 octane recommended for most V8s), Diesel Fuel (for 6.5L Turbo Diesel)

Vortec Engine Codes:

L35, LR4, L30, L31, LQ4, L65

🔧 Transmission

Standard Transmission Light Duty:

4L60E 4-Speed Automatic (RWD/4WD)

Optional Transmission Heavy Duty:

4L80E 4-Speed Automatic (RWD/4WD), NV4500 5-Speed Manual (HD)

Optional Transmission Light Duty Manual:

NV3500 5-Speed Manual (RWD/4WD)

Transmission Fluid Spec 4L60E:

Dexron III / Mercon (or equivalent)

Transmission Fluid Spec 4L80E:

Dexron III / Mercon (or equivalent)

Transfer Case Options:

Installs for NP233 (manual shift), NP243 (electronic shift with dash buttons), NP246 (electronic Autotrac 4WD)

📐 Dimensions

Wheelbase Light Duty:

130.0 in (Standard Bed), 144.5 in (Long Bed)

Wheelbase Heavy Duty:

130.0 in (2500HD), 130.5 in (3500 Single Rear Wheel), 145.5 in (3500 Dual Rear Wheel)

Bed Lengths:

6.5 ft (Standard), 8 ft (Long)

Curb Weight Range:

Approx. 4,500 - 7,000 lbs (depending on configuration)

Towing Capacity Max:

Up to 10,000+ lbs (properly equipped)

Payload Capacity Max:

Up to 4,000+ lbs (properly equipped)

🛡️ Safety Features

NHTSA Rollover Resistance:

3-star (typical for this era, varies by configuration)

Iiihs Crash Test Ratings:

Good in frontal offset (typical for this era, specific results may vary)

Active Safety Features Available:

Anti-lock Braking System (ABS) standard on most models, available on all.

Passive Safety Features:

Front airbags, seat belts with pretensioners, reinforced safety cage construction.

💡 Technology Features

Infotainment Systems:

Factory AM/FM stereo with cassette and/or CD player. Optional premium sound systems. Basic HVAC controls (manual or optional automatic climate control).

Driver Assistance Features:

Cruise control standard on most models. Optional parking assist sensors (rear).

Connectivity Options:

Limited by modern standards. Primarily focused on vehicle operation and basic audio. Trailer wiring provisions common.

OBD Ii Support:

On-Board Diagnostics II (OBD-II) compliant, allowing for engine code scanning and real-time data.

🔧 Maintenance

Oil Change Interval:

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

Engine Coolant Flush:

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

Spark Plug Replacement:

Every 60,000 - 100,000 miles (depending on spark plug type - platinum/iridium recommended for longer life).

Engine Oil Spec:

API Service SG, SH, or SJ; SAE 5W-30 or 10W-30 (refer to manual for temperature ranges and specific engine requirements).

Engine Coolant Spec:

GM P/N 12345773 (Green), or equivalent Dex-Cool compatible coolant (orange) if specified.

Brake Fluid Spec:

DOT 3

Common Issues Engine:

Intake manifold gasket leaks (Vortec V6/V8), oil pressure sending unit failures, exhaust manifold leaks, catalytic converter failure, minor oil leaks (rear main seal, valve cover gaskets).

Common Issues Transmission:

4L60E failure modes (e.g., torque converter shudder, slipping), transmission cooler line leaks, transmission control module (TCM) issues.

Common Issues Chassis:

Front suspension component wear (ball joints, tie rod ends), rear axle seal leaks, brake component wear (rotors, pads), ABS sensor failures.

Common Issues Electrical:

Instrument cluster failures, HVAC blower motor resistor failure, body control module (BCM) glitches, power window/lock motor failures.

📚 Vehicle History

Chevrolet Truck Legacy:

Chevrolet has a long and storied history of building reliable and capable trucks dating back to the early 20th century.

C K Lineage:

The C/K designation has been used for Chevrolet's full-size trucks for decades, evolving through many generations.

Gmt800 Generation Start:

1999 saw the introduction of the entirely new GMT800 platform, replacing the aging GMT400.

Manufacturing Locations:

Various GM assembly plants in North America (e.g., Fort Wayne, Indiana; Janesville, Wisconsin).

🏆 Awards & Recognition

Truck Of The Year Awards:

While specific awards for the 1999 model year may not be as prominent as later iterations, the GMT800 platform as a whole was well-received for its design and capability.

Longevity Reputation:

These trucks are widely recognized for their durability and ability to be maintained and repaired over many years, contributing to their strong resale value and owner loyalty.