AutoCodes – GMC – B3620 GMC

B3620 GMC Code - Head-Up Display Information Up Switch Circuit

Quick Answer

The Head-Up Display (HUD) monitors the HUD information-up switch signal circuit in order to perform the switch functions. Common causes include Faulty Head-Up Display Information Up Switch, Head-Up Display Information Up Switch harness is open or shorted, Head-Up Display Information Up Switch 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: B3620 GMC indicates Head-Up Display Information Up Switch Circuit.
Common causes: Common causes include Faulty Head-Up Display Information Up Switch, Head-Up Display Information Up Switch harness is open or shorted, Head-Up Display Information Up Switch 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 849

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 Mar 10, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3620 GMC Description

The Head-Up Display (HUD) monitors the HUD information-up switch signal circuit in order to perform the switch functions. When the HUD information-up switch is depressed and the ignition is in the RUN position, the switch signal to the HUD is low. When the HUD detects that the HUD information-up switch signal is low for greater than 60 seconds, the Diagnostic Trouble Code (DTC) B3620 sets.

OBDII Code B3620 GMC - Head-Up Display Information Up Switch Circuit - AutoCodes.com — B3620 GMC Code - Head-Up Display Information Up Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B3620 GMC?

Faulty Head-Up Display Information Up Switch
Head-Up Display Information Up Switch harness is open or shorted
Head-Up Display Information Up Switch circuit poor electrical connection

How to Fix the DTC B3620 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 B3620 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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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 B3620 GMC Code

1. What are the common symptoms of OBDII code B3620 GMC related to the Head-Up Display Information Up Switch Circuit?

- The common symptoms include the head-up display not responding to the information up switch input, leading to a lack of display adjustment.

2. What are the possible causes of OBDII code B3620 GMC being triggered?

- The code can be triggered by issues such as a faulty head-up display switch, damaged wiring or connectors in the circuit, or a malfunctioning head-up display module.

3. How can I diagnose the cause of OBDII code B3620 GMC related to the Head-Up Display Information Up Switch Circuit?

- Diagnose the issue by checking the wiring and connectors for any visible damage, testing the functionality of the head-up display switch, and inspecting the head-up display module for proper operation.

4. Are there any quick repair tips for fixing OBDII code B3620 GMC?

- Quick repair tips include checking and repairing any damaged wiring or connectors, replacing the faulty head-up display switch, or resetting the head-up display module if possible.

5. Is it safe to continue driving with OBDII code B3620 GMC present?

- It is generally safe to continue driving with this code, as it mainly affects the functionality of the head-up display and does not pose a significant risk to vehicle operation.

6. Can OBDII code B3620 GMC be reset without fixing the underlying issue?

- While the code can be cleared from the system, it is recommended to diagnose and repair the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair OBDII code B3620 GMC related to the Head-Up Display Information Up Switch Circuit?

- The cost of repair can vary depending on the specific issue, but it may involve replacing a faulty switch, repairing damaged wiring, or recalibrating the head-up display module, with costs ranging from $100 to $500.

8. Will OBDII code B3620 GMC cause my vehicle to fail an emissions test?

- This code is not directly related to emissions, so it should not cause your vehicle to fail an emissions test.

9. Can a DIY enthusiast fix OBDII code B3620 GMC at home?

- DIY enthusiasts with knowledge of automotive electrical systems may be able to diagnose and repair this code at home by following repair manuals and using appropriate tools.

10. How long does it take to repair OBDII code B3620 GMC in a professional auto repair shop?

- The repair time can vary based on the exact cause of the issue, but a professional auto repair shop can typically fix this code within a few hours to a full day, depending on the complexity of the repair needed.