AutoCodes – GMC – B0070 GMC

B0070 GMC Code - Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Open

Quick Answer

The driver roof rail deployment loop consists of an inflatable restraint roof rail module - right and the roof rail module high and low circuits. Common causes include Faulty Right Front/Passenger Roof Rail/Head Curtain Bag, Right Front/Passenger Roof Rail/Head Curtain Bag harness is open or shorted, Right Front/Passenger Roof Rail/Head Curtain Bag 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: B0070 GMC indicates Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Open.
Common causes: Common causes include Faulty Right Front/Passenger Roof Rail/Head Curtain Bag, Right Front/Passenger Roof Rail/Head Curtain Bag harness is open or shorted, Right Front/Passenger Roof Rail/Head Curtain Bag 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 1,258

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0070 GMC Description

The driver roof rail deployment loop consists of an inflatable restraint roof rail module - right and the roof rail module high and low circuits. A shorting bar used within the roof rail module connector shorts together both the roof rail module high and low circuits when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing. During a side or frontal crash of sufficient force the inflatable restraint Sensing and Diagnostic Module (SDM) will allow current to flow through the deployment loop in order to deploy the roof rail module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a Diagnostic Trouble Code (DTC) will be stored in memory.

OBDII Code B0070 GMC - Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Open - AutoCodes.com — B0070 GMC Code - Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Open

What does this mean?

What are the Possible Causes of the DTC B0070 GMC?

Faulty Right Front/Passenger Roof Rail/Head Curtain Bag
Right Front/Passenger Roof Rail/Head Curtain Bag harness is open or shorted
Right Front/Passenger Roof Rail/Head Curtain Bag circuit poor electrical connection
Faulty Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0070 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 B0070 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.

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Get the B0070 GMC code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B0070 GMC Code

1. What are common symptoms of OBDII code B0070 GMC?

The common symptoms of OBDII code B0070 GMC include the airbag warning light illuminating on the dashboard, a message indicating an issue with the right front/passenger roof rail/head curtain bag deployment loop, and the airbag system potentially not deploying in the event of a collision.

2. What causes OBDII code B0070 GMC to trigger?

OBDII code B0070 GMC is triggered when the right front/passenger roof rail/head curtain bag deployment loop is detected as being open or incomplete, indicating a fault in the deployment circuit.

3. How can I diagnose the issue related to OBDII code B0070 GMC?

Diagnosing the issue related to OBDII code B0070 GMC typically involves using a diagnostic scanner to retrieve the specific fault code, inspecting the wiring and connections related to the right front/passenger roof rail/head curtain bag deployment loop, and checking for any damaged components.

4. Can I still drive my vehicle with OBDII code B0070 GMC present?

It is not recommended to drive your vehicle with OBDII code B0070 GMC present, as the airbag system may not function properly in the event of a collision, potentially putting you and your passengers at risk.

5. What are some repair tips for addressing OBDII code B0070 GMC?

Repair tips for addressing OBDII code B0070 GMC may include checking and repairing any damaged wiring or connectors related to the right front/passenger roof rail/head curtain bag deployment loop, ensuring all connections are secure, and resetting the fault code after completing repairs.

6. Is it safe to reset the OBDII code B0070 GMC without fixing the underlying issue?

Resetting the OBDII code B0070 GMC without fixing the underlying issue is not recommended, as it will not resolve the fault in the airbag deployment loop and could potentially lead to safety risks in the future.

7. How much does it typically cost to repair OBDII code B0070 GMC?

The cost of repairing OBDII code B0070 GMC can vary depending on the extent of the damage and the specific components that need to be replaced. It is recommended to consult a professional mechanic for an accurate cost estimate.

8. Are there any recalls or service bulletins related to OBDII code B0070 GMC?

It is advisable to check with the manufacturer or a certified dealership to inquire about any recalls or service bulletins related to OBDII code B0070 GMC, as certain vehicles may be eligible for repair under warranty.

9. Can a DIY enthusiast fix OBDII code B0070 GMC at home?

While some DIY enthusiasts may have the skills to diagnose and repair OBDII code B0070 GMC at home, it is crucial to have the necessary tools, knowledge, and safety precautions in place before attempting any repairs on the airbag system.

10. How important is it to address OBDII code B0070 GMC promptly?

It is highly important to address OBDII code B0070 GMC promptly to ensure the proper functioning of the airbag system and maintain the safety of the vehicle occupants in the event of an accident.