AutoCodes – GMC – U1137 GMC

U1137 GMC Code - Lost Communications With Digital Radio Receiver

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Digital Radio Receiver (DRR), Digital Radio Receiver harness is open or shorted, Digital Radio Receiver 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: U1137 GMC indicates Lost Communications With Digital Radio Receiver.
Common causes: Common causes include Faulty Digital Radio Receiver (DRR), Digital Radio Receiver harness is open or shorted, Digital Radio Receiver 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 520

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 Apr 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1137 GMC Description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for the state of health monitoring/node alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module node alive message. Each module on the class 2 serial data circuit is required to send a Node Alive message every 2 seconds. When no message is detected from a learned identification number for 5 seconds, a Diagnostic Trouble Code (DTC) U1137 is set.

OBDII Code U1137 GMC - Lost Communications With Digital Radio Receiver - AutoCodes.com — U1137 GMC Code - Lost Communications With Digital Radio Receiver

What does this mean?

What are the Possible Causes of the DTC U1137 GMC?

Faulty Digital Radio Receiver (DRR)
Digital Radio Receiver harness is open or shorted
Digital Radio Receiver circuit poor electrical connection

How to Fix the DTC U1137 GMC?

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 U1137 GMC 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 U1137 GMC code?

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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 U1137 GMC Code

1. What are common symptoms of OBDII code U1137 GMC (Lost Communications With Digital Radio Receiver)?

- Common symptoms include no sound from the radio, radio display not working, and issues with other vehicle communication systems.

2. What are possible causes of OBDII code U1137 GMC?

- Possible causes may include a faulty digital radio receiver, damaged wiring or connectors, a malfunctioning radio control module, or a communication network issue.

3. How can I diagnose OBDII code U1137 GMC?

- To diagnose this code, you can start by checking the wiring and connectors related to the digital radio receiver, inspecting the radio control module, and using a diagnostic scanner to communicate with the affected modules.

4. What are some repair tips for resolving OBDII code U1137 GMC?

- Repair tips may include checking and repairing any damaged wiring, replacing the digital radio receiver or radio control module if necessary, and ensuring proper communication between all vehicle modules.

5. Can OBDII code U1137 GMC cause other problems in the vehicle?

- Yes, if left unresolved, this code may affect the functionality of other communication systems in the vehicle, leading to issues with entertainment features, control modules, and overall vehicle diagnostics.

6. Is it safe to continue driving with OBDII code U1137 GMC present?

- It is generally safe to drive with this code present, but it is recommended to address the underlying issue promptly to prevent potential communication failures with other vehicle systems.

7. How can I prevent OBDII code U1137 GMC from recurring?

- To prevent this code from recurring, ensure proper maintenance of the vehicle's communication systems, address any wiring or connector issues promptly, and follow manufacturer-recommended service intervals.

8. Can a DIY enthusiast fix OBDII code U1137 GMC at home?

- Depending on the level of expertise and access to tools, a DIY enthusiast may be able to diagnose and repair this code at home by following the manufacturer's service manual and using a diagnostic scanner.

9. Are there any recalls or technical service bulletins related to OBDII code U1137 GMC?

- It is recommended to check with the vehicle manufacturer or authorized service centers for any recalls or technical service bulletins related to this specific OBDII code to ensure proper repair procedures.

10. How much does it cost to repair OBDII code U1137 GMC at a professional auto repair shop?

- Repair costs for this code can vary depending on the specific cause, parts required, and labor rates, but it is advisable to obtain quotes from multiple reputable auto repair shops for an accurate estimate.