Most Common Car Issues

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MOST COMMON PROBLEMS

GMC Yukon 2018

The 2018 GMC Yukon Denali is a robust multipurpose passenger vehicle with a 6.2L V8 engine producing a displacement of 6200 CC. It seats up to 8 passengers and offers advanced safety features like Dynamic Brake Support, Lane Departure Warning, and Blind Spot Warning as standard. With a 10-speed automatic transmission and a top speed of 113 MPH, this 4WD vehicle ensures a smooth and powerful drive. The starting price is $66,200, reflecting its premium build and extensive features.

Spec:

Dynamic Brake Support (DBS)

Standard

Engine Model

L86 - Spark Ignited Direct Injection, Variable Valve Timing, AFM, E85MAX, ALUM

Engine Number of Cylinders

Problems:

Dynamic brake support (dbs) issues

Sometimes, the system may not activate as expected due to sensor malfunctions or software glitches.

Engine misfire

This can be caused by faulty spark plugs, ignition coils, or issues with the fuel injectors.

Oil consumption

The L86 engine is known to consume more oil than expected, often due to the Active Fuel Management (AFM) system.

Carbon buildup

Direct injection engines like the L86 can experience carbon buildup on the intake valves, affecting performance.

Timing chain wear

Over time, the timing chain may stretch or wear, leading to engine timing issues.

Fuel system problems

The fuel pump or fuel injectors may fail or become clogged, especially when using E85 fuel.

Cooling system issues

Radiator or water pump failures can lead to overheating.

Variable valve timing (vvt) problems

The VVT system may experience solenoid or actuator failures, causing poor engine performance.

Electrical system malfunctions

Issues with wiring or sensors can lead to various engine and vehicle performance problems.

Exhaust system failures

Problems with the catalytic converter or exhaust manifold can lead to reduced efficiency and performance.