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The 2015 GMC Sierra 1500 SLT is a robust pickup truck manufactured by General Motors LLC in Silao, Mexico. It features a 6.2-liter V8 engine capable of running on gasoline and ethanol (E85), with a hydraulic brake system and 4WD capabilities. This Crew Cab model is equipped with comprehensive airbag coverage and a direct tire pressure monitoring system, making it a reliable choice for both safety and performance.

Decoded VIN:

Make

GMC

Manufacturer Name

GENERAL MOTORS LLC

Model

Sierra

Model Year

2015

Plant City

SILAO

Series

1500

Trim

SLT

Vehicle Type

TRUCK

Plant Country

MEXICO

Plant Company Name

GMNA

Plant State

GUANAJUATO

Note

Engines listed as flexible fuel do not necessarily mean the vehicle is equipped for flexible fuel.

Body Class

Pickup

Doors

Gross Vehicle Weight Rating From

Class 2F: 7,001 - 8,000 lb (3,175 - 3,629 kg)

Cab Type

Crew/Super Crew/Crew Max

Drive Type

4WD/4-Wheel Drive/4x4

Brake System Type

Hydraulic

Engine Number of Cylinders

Displacement (CC)

6200.0

Displacement (CI)

378.34721338734

Displacement (L)

6.2

Engine Model

L86 - VVT, AFM, E85 Max, Aluminum

Fuel Type - Primary

Gasoline

Fuel Type - Secondary

Ethanol (E85)

Fuel Delivery / Fuel Injection Type

Stoichiometric Gasoline Direct Injection (SGDI)

Seat Belt Type

Manual

Curtain Air Bag Locations

All Rows

Front Air Bag Locations

1st Row (Driver and Passenger)

Side Air Bag Locations

1st Row (Driver and Passenger)

Tire Pressure Monitoring System (TPMS) Type

Direct

Most common problems:

Brake fluid leaks

Hydraulic brake systems can develop leaks in the brake lines or at the calipers, leading to decreased braking performance and potential brake failure.

Brake pedal feels spongy

Air in the hydraulic brake lines can cause the brake pedal to feel spongy and reduce braking effectiveness.

Excessive oil consumption

The L86 engine is known to have issues with consuming more oil than expected, which can lead to low oil levels and potential engine damage.

Valvetrain noise

This engine model with VVT (Variable Valve Timing) and AFM (Active Fuel Management) can develop a ticking noise due to lifter or camshaft wear.

Fuel injector failure

In E85 compatible engines like the L86, fuel injectors may get clogged or fail, particularly if E85 fuel is used frequently, affecting performance and fuel efficiency.

Cooling system issues

Aluminum engines can be prone to overheating if the cooling system is not properly maintained, leading to potential engine damage.

Transmission problems

Although not directly related to the engine, the GMC Sierra 2015 is known for transmission issues, such as hard shifting or slipping, which can affect overall vehicle performance.

Rust and corrosion

Depending on the environment, rust and corrosion can affect braking components and other undercarriage parts, leading to potential safety hazards.

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