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The 1998 Chevrolet GMT-400 is a classic 2-door pickup truck powered by a 4.3L V6 engine. Manufactured by General Motors at their Fort Wayne Assembly plant in Indiana, this 1/2 ton vehicle features a hydraulic brake system and a 4x2 drive type. With a gross vehicle weight rating from Class 2E, it's designed for moderate hauling and everyday utility.

Decoded VIN:

Make

CHEVROLET

Manufacturer Name

GENERAL MOTORS LLC

Model

GMT-400

Model Year

1998

Plant City

ROANOKE

Series

1/2 Ton Nominal

Vehicle Type

TRUCK

Plant Country

UNITED STATES (USA)

Plant Company Name

Fort Wayne Assembly

Plant State

INDIANA

Series2

Conventional Cab

Body Class

Pickup

Doors

Gross Vehicle Weight Rating From

Class 2E: 6,001 - 7,000 lb (2,722 - 3,175 kg)

Drive Type

4x2

Brake System Type

Hydraulic

Engine Number of Cylinders

Displacement (CC)

4300.0

Displacement (CI)

262.40209960734

Displacement (L)

4.3

Engine Configuration

V-Shaped

Other Engine Info

CPI, 90 Degrees

Engine Manufacturer

WRN

Most common problems:

Brake fluid leaks

Hydraulic brake systems can develop leaks in brake lines, hoses, or seals, leading to reduced braking efficiency.

Brake master cylinder failure

Over time, the master cylinder can wear out, causing inconsistent brake pedal feel or brake fluid leaks.

Brake caliper issues

The calipers can seize or stick, leading to uneven brake pad wear and pulling to one side during braking.

Brake pad and rotor wear

Frequent use can cause wear on brake pads and rotors, reducing braking performance and causing noise.

Engine misfires

V-shaped engines like the V6 can experience misfires due to issues with spark plugs, ignition coils, or fuel injectors.

Cooling system problems

V-shaped engines can have complex cooling systems that, if not properly maintained, can lead to overheating issues.

Oil leaks

Common in older engines, especially around valve cover gaskets and oil pan gaskets.

Timing chain/belt issues

If not properly maintained, the timing chain or belt can wear out, causing engine performance issues or catastrophic engine failure.

Fuel system problems

Issues with the Central Port Injection (CPI) system, such as clogged injectors or fuel pressure regulator failures, can affect engine performance.

Intake manifold gasket failure

Common in V6 engines, this can cause coolant leaks and engine overheating or misfires.

Egr valve issues

The Exhaust Gas Recirculation valve can get clogged, leading to rough idling and reduced fuel efficiency.

Oxygen sensor failures

Faulty oxygen sensors can lead to poor fuel economy and increased emissions.

Transmission problems

Older GMT-400 models can experience transmission issues such as slipping, hard shifting, or delayed engagement.

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