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The 1998 CHEVROLET GMT-400 is a robust pickup truck with a 5.7L V8 engine and 4WD capability. It features an extended cab and utilizes a multipoint fuel injection system. Manufactured by GENERAL MOTORS LLC in Oshawa, Ontario, this 1/2 Ton Nominal series truck is built for both power and durability. Ideal for heavy-duty tasks, it falls within the Class 2E weight rating.

Decoded VIN:

Make

CHEVROLET

Manufacturer Name

GENERAL MOTORS LLC

Model

GMT-400

Model Year

1998

Plant City

OSHAWA TRUCK

Series

1/2 Ton Nominal

Vehicle Type

TRUCK

Plant Country

CANADA

Plant Company Name

NA-Canada - Truck

Plant State

ONTARIO

Series2

Conventional Cab

Body Class

Pickup

Gross Vehicle Weight Rating From

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

Cab Type

Extra/Super/Quad/Double/King/Extended

Drive Type

4WD/4-Wheel Drive/4x4

Brake System Type

Hydraulic

Engine Number of Cylinders

Displacement (CC)

5700.0

Displacement (CI)

347.83534133997

Displacement (L)

5.7

Engine Configuration

V-Shaped

Fuel Delivery / Fuel Injection Type

Multipoint Fuel Injection (MPFI)

Engine Manufacturer

WRN

Most common problems:

Brake fluid leaks

Hydraulic brake systems can develop leaks in the brake lines, master cylinder, or wheel cylinders, leading to a loss of brake fluid and reduced braking performance.

Brake fade

Overheating of the brake components, especially during heavy use, can cause brake fade, resulting in reduced braking efficiency.

Worn brake pads

Brake pads wear down over time and need to be replaced to maintain proper braking performance and avoid damage to the rotors.

Engine misfires

V-shaped engines like the V8 can experience misfires due to issues with spark plugs, ignition coils, or fuel injectors.

Oil leaks

V8 engines, especially older ones, can develop oil leaks from the valve cover gaskets, oil pan gasket, or rear main seal.

Coolant leaks

The engine may develop coolant leaks from the radiator, hoses, water pump, or intake manifold gaskets, leading to overheating.

Timing chain/belt issues

Wear and tear on the timing chain or belt in V8 engines can lead to timing problems, affecting engine performance.

Fuel injector problems

Dirty or clogged fuel injectors can cause poor engine performance, reduced fuel efficiency, and rough idling.

Exhaust manifold cracks

V8 engines can develop cracks in the exhaust manifolds, leading to exhaust leaks and increased engine noise.

Sensor failures

Aging vehicles like the 1998 CHEVROLET GMT-400 can experience sensor failures, such as the oxygen sensor or mass airflow sensor, affecting engine management.

Transmission slipping

Automatic transmissions in older vehicles can experience slipping or rough shifting due to worn clutches or low transmission fluid.

Rust and corrosion

Older vehicles are prone to rust and corrosion, especially in areas with harsh weather conditions, impacting the durability of brake lines and other components.

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