AutoCodes – GMC – B133B 2017 GMC Sierra

B133B 2017 GMC Sierra Code - Reverse Gear Status Not Plausible

Quick Answer

The Human Machine Interface Control Module receives a signal from the Human Machine Interface Control Module Bypass Module indicating reverse gear status. 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: B133B 2017 GMC Sierra indicates Reverse Gear Status Not Plausible.
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 192

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 17, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B133B 2017 GMC Sierra Description

The Human Machine Interface Control Module receives a signal from the Human Machine Interface Control Module Bypass Module indicating reverse gear status. The reverse gear status is used to determine when to activate the rearview camera display. The Human Machine Interface Control Module also receives another reverse gear status message via serial data. The Human Machine Interface Control Module compares the two serial data messages to verify the plausibility of the messages. The Diagnostic Trouble Code (DTC) will be set when the Human Machine Interface Control Module has determined the reverse message states do not match and are therefore not plausible.

OBDII Code B133B 2017 GMC Sierra - Reverse Gear Status Not Plausible - AutoCodes.com — B133B 2017 GMC Sierra Code - Reverse Gear Status Not Plausible

What does this mean?

What are the Possible Causes of the DTC B133B 2017 GMC Sierra?

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

How to Fix the DTC B133B 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 B133B 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 B133B 2017 GMC Sierra code?

Need more information on how to fix the B133B 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the 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 B133B 2017 GMC Sierra Code

1. What does OBDII code B133B on a 2017 GMC Sierra mean?

The code B133B indicates a "Reverse Gear Status Not Plausible" issue in the transmission system of a 2017 GMC Sierra.

2. What are some common symptoms of OBDII code B133B in a 2017 GMC Sierra?

Common symptoms of code B133B may include difficulty shifting into reverse gear, erratic shifting behavior, and potential transmission slippage.

3. What are the possible causes of OBDII code B133B in a 2017 GMC Sierra?

Potential causes of code B133B include faulty transmission sensors, wiring issues, software glitches, or a malfunctioning transmission control module.

4. How can I diagnose the OBDII code B133B on my 2017 GMC Sierra?

Diagnosing code B133B typically involves using a professional OBDII scanner to retrieve the specific error codes, conducting a visual inspection of wiring and connectors, and performing tests on transmission components.

5. Can I continue driving my 2017 GMC Sierra with OBDII code B133B?

It is not recommended to continue driving your GMC Sierra with code B133B, as unresolved transmission issues can lead to further damage and potentially unsafe driving conditions.

6. How can I clear the OBDII code B133B on my 2017 GMC Sierra?

Clearing the code B133B requires fixing the underlying issue causing the fault code to appear. Once the problem is resolved, you can clear the code using an OBDII scanner.

7. Is it safe to ignore OBDII code B133B in my 2017 GMC Sierra?

Ignoring code B133B can lead to more severe transmission problems over time. It is best to address the issue promptly to prevent further damage.

8. Are there any DIY repair tips for fixing OBDII code B133B in a 2017 GMC Sierra?

While basic checks like inspecting wiring connections can be done DIY, diagnosing and repairing complex transmission issues related to B133B may require professional help.

9. How much does it cost to repair OBDII code B133B in a 2017 GMC Sierra?

The cost of repairing code B133B can vary depending on the specific cause of the issue. It is recommended to get a diagnostic from a qualified mechanic to determine the exact repair cost.

10. Can a software update fix OBDII code B133B in a 2017 GMC Sierra?

In some cases, a software update from the dealership or a qualified mechanic may address the issue causing code B133B in a 2017 GMC Sierra.