1GDCT14Z1M8802174

The 1991 GMC Sonoma is a robust pickup with a 4.3L V6 engine and 4WD capabilities. Engineered with a hydraulic brake system and throttle body fuel injection, it offers reliability and power. Manufactured by General Motors in Shreveport, Louisiana, this model features a two-door, small conventional cab design. Ideal for those needing a durable work vehicle with a gross vehicle weight rating of up to 5,000 lbs.

Decoded VIN:

Make

GMC

Manufacturer Name

GENERAL MOTORS LLC

Model

Sonoma

Model Year

1991

Plant City

SHREVEPORT

Vehicle Type

INCOMPLETE VEHICLE

Plant Country

UNITED STATES (USA)

Plant Company Name

NA - Truck Platform

Plant State

LOUISIANA

Trim2

1/2 ton nominal

Series2

Small Conventional Cab

Body Class

Pickup

Doors

Gross Vehicle Weight Rating From

Class 1C: 4,001 - 5,000 lb (1,814 - 2,268 kg)

Drive Type

4WD/4-Wheel Drive/4x4

Brake System Type

Hydraulic

Engine Number of Cylinders

Displacement (CC)

4300.0

Displacement (CI)

262.40209960734

Displacement (L)

4.3

Fuel Type - Primary

Gasoline

Engine Configuration

V-Shaped

Fuel Delivery / Fuel Injection Type

Throttle Body Fuel Injection (TBI)

Other Engine Info

90 Degree

Engine Manufacturer

CPC

Most common problems:

Brake fluid leaks

Hydraulic brake systems can develop leaks in the brake lines, master cylinder, or brake calipers, leading to reduced braking performance or brake failure.

Brake fade

Continual or heavy braking can cause the brake fluid to overheat, leading to reduced braking efficiency, commonly referred to as brake fade.

Warped brake rotors

Repeated heavy braking can cause the brake rotors to warp, leading to vibrations and reduced braking performance.

Master cylinder failure

The master cylinder can wear out over time, leading to a loss of hydraulic pressure and brake failure.

Brake pad wear

Brake pads wear out over time and need to be replaced regularly to maintain effective braking.

Engine overheating

V-shaped engines, especially older ones, can suffer from cooling issues leading to overheating, which can cause significant engine damage if not addressed.

Oil leaks

V-shaped engines, especially older models, are prone to developing oil leaks at the valve cover gaskets, oil pan, or rear main seal.

Timing chain/belt issues

Over time, timing chains or belts can wear out or become misaligned, leading to poor engine performance or potential engine damage.

Fuel injector problems

Older fuel injectors can become clogged or fail, leading to poor engine performance and fuel efficiency.

Ignition system failures

Components such as the ignition coil, spark plugs, or distributor can fail, leading to misfires, rough idling, or difficulty starting the engine.

Exhaust manifold cracks

The exhaust manifold in V-shaped engines can develop cracks over time, leading to exhaust leaks and reduced engine performance.

Intake manifold gasket leaks

V-shaped engines can experience intake manifold gasket failures, leading to vacuum leaks, poor engine performance, and potential overheating.