AutoCodes – GMC – U2099 2015 GMC Sierra

U2099 2015 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 2015 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 240

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 2015 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 2015 GMC Sierra - High Speed Communication Enable Circuit - AutoCodes.com — U2099 2015 GMC Sierra Code - High Speed Communication Enable Circuit

What does this mean?

What are the Possible Causes of the DTC U2099 2015 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 2015 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 2015 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 2015 GMC Sierra code?

Need more information on how to fix the U2099 2015 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2099 2015 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 2015 GMC Sierra Code

1. What does the OBDII code U2099 for a 2015 GMC Sierra mean?

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

2. What are the common symptoms of OBDII code U2099 in a 2015 GMC Sierra?

Common symptoms may include issues with the vehicle's communication systems, such as difficulty connecting to diagnostic tools or malfunctioning electronic components.

3. What are the possible causes of OBDII code U2099 in a 2015 GMC Sierra?

Potential causes of this code may include damaged wiring, loose connections, a faulty control module, or issues with the communication network itself.

4. How can I diagnose the High Speed Communication Enable Circuit issue related to OBDII code U2099 in my 2015 GMC Sierra?

Diagnosis typically involves checking the wiring and connections associated with the high-speed communication circuit, as well as using a diagnostic scanner to pinpoint the exact source of the problem.

5. Can I drive my 2015 GMC Sierra with OBDII code U2099?

It is generally not recommended to drive the vehicle with unresolved OBDII code U2099, as it may lead to further electrical issues or affect the performance of electronic systems in the vehicle.

6. How can I repair OBDII code U2099 in my 2015 GMC Sierra?

Repairing this code often involves inspecting and repairing any damaged wiring or connections, replacing faulty components, and resetting the code with a diagnostic tool.

7. Can a DIY enthusiast fix OBDII code U2099 in a 2015 GMC Sierra?

Depending on the skill level and experience of the DIY enthusiast, it may be possible to address simple wiring or connection issues related to the High Speed Communication Enable Circuit. However, complex repairs may require professional assistance.

8. How much does it cost to repair OBDII code U2099 in a 2015 GMC Sierra?

The cost of repairing OBDII code U2099 can vary depending on the exact cause of the issue, the parts needed for repair, and whether professional labor is required. It's recommended to get a diagnostic assessment from a mechanic for an accurate estimate.

9. Are there any preventive measures to avoid OBDII code U2099 in a 2015 GMC Sierra?

Regular maintenance, such as checking and securing wiring connections, inspecting the communication network, and promptly addressing any electrical issues, can help prevent the occurrence of OBDII code U2099.

10. Can OBDII code U2099 in a 2015 GMC Sierra cause other problems if left unrepaired?

If left unrepaired, OBDII code U2099 can potentially lead to further malfunctions in the vehicle's electronic systems, affect communication between control modules, and result in performance issues. It's best to address the code promptly to prevent additional problems.