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The 2020 GMC Sierra AT4 is a robust 4WD truck powered by a 3.0L turbocharged diesel engine (LM2) with a displacement of 3000 CC. It features a comprehensive safety suite including standard Dynamic Brake Support (DBS), Anti-lock Braking System (ABS), and Electronic Stability Control (ESC), with optional advanced systems like Lane Departure Warning (LDW) and Adaptive Cruise Control (ACC). The vehicle offers a mix of comfort and technology with standard keyless ignition, LED headlamps, and a backup camera, complemented by optional features such as Parking Assist and Blind Spot Warning (BSW). Built in Silao, Mexico, this crew cab truck is designed for both rugged performance and modern convenience.

Decoded VIN:

Make

GMC

Manufacturer Name

GENERAL MOTORS LLC

Model

Sierra

Model Year

2020

Plant City

SILAO

Series

1500

Trim

AT4

Vehicle Type

TRUCK

Plant Country

MEXICO

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

Number of Wheels

Wheel Size Front (inches)

Wheel Size Rear (inches)

Drive Type

4WD/4-Wheel Drive/4x4

Brake System Type

Hydraulic

Engine Number of Cylinders

Displacement (CC)

3000.0

Displacement (CI)

183.07123228419

Displacement (L)

3.0

Engine Model

LM2

Fuel Type - Primary

Diesel

Valve Train Design

Dual Overhead Cam (DOHC)

Engine Configuration

In-Line

Other Engine Info

CRI, TURBO, VGT, ALUM, CSS50V

Turbo

Yes

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)

Anti-lock Braking System (ABS)

Standard

Electronic Stability Control (ESC)

Standard

Traction Control

Standard

Tire Pressure Monitoring System (TPMS) Type

Direct

Auto-Reverse System for Windows and Sunroofs

Standard

Keyless Ignition

Standard

Adaptive Cruise Control (ACC)

Optional

Crash Imminent Braking (CIB)

Optional

Blind Spot Warning (BSW)

Optional

Forward Collision Warning (FCW)

Optional

Lane Departure Warning (LDW)

Optional

Lane Keeping Assistance (LKA)

Optional

Backup Camera

Standard

Parking Assist

Optional

Dynamic Brake Support (DBS)

Standard

Pedestrian Automatic Emergency Braking (PAEB)

Optional

Automatic Crash Notification (ACN) / Advanced Automatic Crash Notification (AACN)

Standard

Daytime Running Light (DRL)

Standard

Headlamp Light Source

LED

Semiautomatic Headlamp Beam Switching

Standard

Adaptive Driving Beam (ADB)

Optional

Rear Cross Traffic Alert

Optional

Most common problems:

Brake fluid leaks

Hydraulic brake systems rely on fluid pressure, and leaks can lead to reduced braking performance or total brake failure.

Brake fade

Extended use, especially under heavy load or high-speed conditions, can cause overheating and reduced braking effectiveness.

Abs sensor malfunction

The Anti-lock Braking System (ABS) sensors can fail, leading to loss of ABS functionality.

Brake pad wear

Brake pads wear out over time and require regular replacement to maintain effective braking.

Turbocharger issues

The turbocharger can fail or underperform due to component wear, oil contamination, or other mechanical issues.

Variable geometry turbocharger (vgt) problems

VGT mechanisms can stick or fail, leading to reduced engine performance and efficiency.

Engine overheating

Issues with the cooling system, such as a faulty radiator or water pump, can cause the engine to overheat.

Injector problems

The Common Rail Injection (CRI) system can suffer from injector failures or clogs, affecting engine performance.

Egr valve issues

The Exhaust Gas Recirculation (EGR) valve can become clogged, leading to poor engine performance and increased emissions.

Check engine light activation

Various sensor or component failures can trigger the check engine light, requiring diagnostic attention.

Fuel system contamination

Contaminated fuel can cause clogging and damage to the fuel system, affecting engine performance.

Timing chain wear

Over time, the timing chain can wear out, leading to potential engine timing issues and performance loss.

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