AutoCodes – GMC – U2099 2016 GMC Sierra

U2099 2016 GMC Sierra Code - High Speed Communication Enable Circuit

Quick Answer

The Body Control Module (BCM) activates the ignition circuit, when the ignition key is in ACC, ON or START. Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U2099 2016 GMC Sierra indicates High Speed Communication Enable Circuit.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 246

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 24, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2099 2016 GMC Sierra Description

The Body Control Module (BCM) activates the ignition circuit, when the ignition key is in ACC, ON or START. The ignition circuit wakes up the devices for serial data bus communication. The Diagnostic Trouble Code (DTC) will set when the BCM senses a short to ground on the ignition circuit.

OBDII Code U2099 2016 GMC Sierra - High Speed Communication Enable Circuit - AutoCodes.com — U2099 2016 GMC Sierra Code - High Speed Communication Enable Circuit

What does this mean?

What are the Possible Causes of the DTC U2099 2016 GMC Sierra?

Faulty Body Control Module (BCM)
Body Control Module harness is open or shorted
Body Control Module circuit poor electrical connection

How to Fix the DTC U2099 2016 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U2099 2016 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the U2099 2016 GMC Sierra code?

Need more information on how to fix the U2099 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2099 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U2099 2016 GMC Sierra Code

1. What does the OBDII code U2099 on a 2016 GMC Sierra indicate?

- The U2099 code indicates a problem with the High Speed Communication Enable Circuit in the vehicle.

2. What are the common symptoms associated with the U2099 code?

- Common symptoms include issues with the vehicle's communication systems, such as problems with the instrument cluster, radio, or other electronic modules.

3. What are possible causes of the U2099 code in a 2016 GMC Sierra?

- Possible causes of the U2099 code include wiring issues, a faulty communication module, a damaged connector, or a problem with the CAN bus network.

4. How can I diagnose the U2099 code in my 2016 GMC Sierra?

- Diagnosing the U2099 code typically involves using a professional OBDII scanner to read the code, inspecting the wiring and connectors related to the High Speed Communication Enable Circuit, and checking for any underlying issues with the communication modules.

5. Can I still drive my vehicle with the U2099 code present?

- It is not recommended to drive your vehicle with the U2099 code present, as it can affect the proper functioning of important communication systems in the vehicle.

6. How can I repair the U2099 code in my 2016 GMC Sierra?

- Repairing the U2099 code may involve fixing any wiring or connector issues, replacing a faulty communication module, or addressing any problems with the CAN bus network. It is recommended to consult a professional mechanic for proper diagnosis and repair.

7. Will resetting the OBDII code U2099 make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the U2099 code is not addressed, the code is likely to reappear.

8. How much does it typically cost to repair the U2099 code in a 2016 GMC Sierra?

- The cost of repairing the U2099 code can vary depending on the specific issue causing the code and the labor rates of the repair shop. It is recommended to obtain a diagnosis and repair estimate from a qualified mechanic.

9. Are there any recalls or technical service bulletins related to the U2099 code in a 2016 GMC Sierra?

- It is advisable to check with a GMC dealership or online resources for any recalls or technical service bulletins related to the U2099 code in your specific vehicle.

10. Can a DIY enthusiast without professional automotive experience fix the U2099 code?

- Repairing the U2099 code may require advanced diagnostic tools and knowledge of automotive electrical systems. It is recommended to seek assistance from a professional mechanic unless you have the necessary expertise and tools to properly diagnose and repair the issue.