AutoCodes – GMC – U2099 2017 GMC Sierra

U2099 2017 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 2017 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 210

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 2017 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 2017 GMC Sierra - High Speed Communication Enable Circuit - AutoCodes.com — U2099 2017 GMC Sierra Code - High Speed Communication Enable Circuit

What does this mean?

What are the Possible Causes of the DTC U2099 2017 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 2017 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 2017 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 2017 GMC Sierra code?

Need more information on how to fix the U2099 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2099 2017 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 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code U2099 in a 2017 GMC Sierra?

- Common symptoms include issues with the high-speed communication network between various modules in the vehicle, leading to problems with data exchange and control functions.

2. What does the U2099 OBDII code mean for a 2017 GMC Sierra?

- The U2099 code indicates a malfunction in the High-Speed Communication Enable Circuit within the vehicle's network.

3. What are some possible causes of the U2099 trouble code in a 2017 GMC Sierra?

- Potential causes of the U2099 code include wiring issues, loose connections, faulty modules, damaged components, or a malfunctioning communication network.

4. How can I diagnose the U2099 code in my 2017 GMC Sierra?

- Diagnosing the U2099 code typically involves using a diagnostic scanner to retrieve the code, inspecting wiring and connections for damage, testing modules for faults, and checking the overall health of the communication network.

5. Can I continue driving my 2017 GMC Sierra with the U2099 trouble code?

- It is not recommended to continue driving the vehicle with the U2099 code present, as it can affect the communication between critical systems in the vehicle and lead to potential safety hazards.

6. How can I repair the U2099 code in my 2017 GMC Sierra?

- Repairing the U2099 code may involve repairing or replacing damaged wiring, securing loose connections, replacing faulty modules, or addressing any issues affecting the communication network.

7. Is it necessary to reset the trouble codes after repairing the U2099 code in a 2017 GMC Sierra?

- Yes, it is recommended to reset the trouble codes after repairing the U2099 code to clear the fault codes and ensure proper functioning of the vehicle's systems.

8. Can weather or environmental factors trigger the U2099 code in a 2017 GMC Sierra?

- Extreme weather conditions or environmental factors can sometimes cause wiring or connection issues that lead to the U2099 trouble code in a 2017 GMC Sierra.

9. How much does it typically cost to repair the U2099 code in a 2017 GMC Sierra?

- The cost of repairing the U2099 code can vary depending on the underlying cause, the extent of the repair needed, and labor costs. It is advisable to consult with a professional mechanic for an accurate estimate.

10. Are there any preventive measures to avoid the U2099 trouble code in a 2017 GMC Sierra?

- Regular maintenance, timely inspections, and addressing any wiring or connection issues promptly can help prevent the occurrence of the U2099 trouble code in a 2017 GMC Sierra.