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GM Fuel Injector & Wiring Harness Chafing Problems

  Norman Taylor & Associates
  October 13, 2022

Does your GM vehicle have issues starting, accelerating, or misfiring? Your car might have fuel injector defects. From brand new Cadillacs to Escalades and Suburbans, these problems affect some of GM’s most popular vehicles. 

General Motors cars are dealing with some serious fuel injector issues, even in some of its newest models: 

  • GMC Cadillac Fuel Injectors – A wide range of GMC Cadillacs are having issues with fuel injectors. Specifically, some Cadillacs had incorrect fuel injector replacements, which could lead to the car shaking or stalling.  
  • GM Fuel Injector Engine Wiring Harness Chafing – There’s also another major issue with newer GM cars: wire harness chafing. This problem leads to the fuel injectors malfunctioning on a serious level, causing issues with the car starting, shifting, accelerating, and misfiring. 

In just one week, our California lemon law firm handled four cases related to GMC Cadillac fuel injector defects. Could your car be one of the many vehicles affected? 

Here’s what you need to know about GM fuel injector defects (plus what you can do about it as an informed consumer). 

GMC Cadillacs: Fuel Injector Replacement Errors 

GM noticed some cases of an incorrect fuel injector being installed when the cars came in for repairs. After some customers complained about issues with the way their car ran and came to the service department with their check engine lights on, GM identified this as the source of the problem. 

This issue is mainly the fault of the mechanic replacing a fuel injector, as they didn’t choose the correct part. 

Signs of a Bad Fuel Injector

A few signs of this fuel injector issue include: 

  • Rough idling 
  • Check engine light is illuminated 

GMC Cadillac Engines Affected 

This issue affects GMC Cadillacs from 2014 – 2021 with a V6 or V8 engine. Engine models affected include: 

  • LV1
  • LV3
  • L82
  • L83
  • L84
  • L8B
  • LT1
  • L86
  • L87
  • LT2
  • LT4
  • LT5
  • L8T
  • LTA 

GM Fuel Injector Engine Wiring Harness Defect

There’s a widespread issue with the fuel injector wiring harness in certain GM vehicles. When this part malfunctions, the vehicle owner might have problems starting the car, driving the car, shifting between gears, and could even stall out. 

What’s the Problem With GM’s Fuel Injector Wiring Harness? 

When the car is being driven, the engine rocks back and forth in its mounts. This causes the wiring harness to come into contact with a bracket, leading to chafing and malfunctions. 

When the wiring that plugs into the fuel injectors chafes, becomes deteriorated, or breaks entirely, it affects how much fuel is sent to the engine. When a car’s engine doesn’t receive enough fuel, it can’t run properly. 

Signs of Fuel Injector Defects in GM Vehicles

A few signs of fuel injector wire harness chafing include: 

  • Service Engine Soon (SES) light
  • Check Engine light (AKA Malfunction Indicator Light, or MIL) 
  • The car doesn’t start
  • The car doesn’t crank 
  • The engine runs rough
  • The engine isn’t getting enough power 
  • Erratic speedometer operation 
  • The car stalls 
  • Misfires 
  • Trouble shifting
  • Electrical issues, such as blown fuses

Customers might notice this issue while driving normally, shifting between drive and reverse, accelerating, or breaking. 

GM Vehicles Affected 

  • 2021 – 2022 Cadillac Escalade 
  • 2019 Chevrolet Silverado
  • 2022 Chevrolet Silverado 
  • 2021 – 2022 Chevrolet Suburban 
  • 2021 – 2022 Chevrolet Tahoe  
  • 2019 – 2022 GMC Sierra 1500 
  • 2021 – 2022 GMC Yukon 

Contact Our California Lemon Law Attorneys Today

Do you suspect your General Motors vehicle has issues with its fuel injectors? Have you taken your car to get repaired at the dealership only to continue having issues with it? 

As a consumer, you have the right to drive a safe vehicle free from defects. If you purchased or leased a defective motor vehicle, you have legal recourse under California’s lemon law.

To learn more about if you qualify for a refund or vehicle replacement, contact Norman Taylor & Associates today for a FREE consultation. 

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