B1820 GMC Code - Driver Seat Recline Rearward Switch Circuit
Quick Answer
The Seat Memory Control Module supplies a reference voltage to each signal circuit of the Driver Seat Adjuster Switch. Common causes include Faulty Driver Seat Adjuster Switch, Driver Seat Adjuster Switch harness is open or shorted, Driver Seat Adjuster 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
- B1820 GMC indicates Driver Seat Recline Rearward Switch Circuit.
- Common causes
- Common causes include Faulty Driver Seat Adjuster Switch, Driver Seat Adjuster Switch harness is open or shorted, Driver Seat Adjuster 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.
Code B1820 GMC Description
What are the Possible Causes of the DTC B1820 GMC?
- Faulty Driver Seat Adjuster Switch
- Driver Seat Adjuster Switch harness is open or shorted
- Driver Seat Adjuster Switch circuit poor electrical connection
- Faulty Seat Memory Control Module
How to Fix the DTC B1820 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 B1820 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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Information for Specific GMC Models
- B1820 2014 GMC Sierra — Driver Seat Recline Rearward Switch Circuit
- B1820 2015 GMC Sierra — Driver Seat Recline Rearward Switch Circuit
- B1820 2016 GMC Sierra — Driver Seat Recline Rearward Switch Circuit
- B1820 2017 GMC Sierra — Driver Seat Recline Rearward Switch Circuit
- B1820 2018 GMC Sierra — Driver Seat Recline Rearward Switch Circuit
Frequently Asked Questions about B1820 GMC Code
1. What are common symptoms of OBDII code B1820 GMC related to the Driver Seat Recline Rearward Switch Circuit?
- Common symptoms include the inability to adjust the driver seat to recline rearward or intermittent functionality of the seat recline feature.
2. What are possible causes of OBDII code B1820 GMC for the Driver Seat Recline Rearward Switch Circuit?
- Possible causes include a faulty driver seat recline rearward switch, damaged wiring or connectors in the circuit, or a malfunctioning seat control module.
3. How can I diagnose the issue causing OBDII code B1820 GMC for the Driver Seat Recline Rearward Switch Circuit?
- Diagnose the issue by inspecting the wiring and connectors for any visible damage, testing the functionality of the recline rearward switch, and using a diagnostic scan tool to check for fault codes in the seat control module.
4. Can I repair OBDII code B1820 GMC related to the Driver Seat Recline Rearward Switch Circuit myself?
- Depending on your level of automotive repair experience, you may be able to repair the issue yourself by replacing the faulty switch, repairing damaged wiring, or resetting the seat control module. However, if unsure, it's best to consult a professional mechanic.
5. Are there any simple troubleshooting steps I can take for OBDII code B1820 GMC before seeking professional help?
- Yes, you can start by checking the fuse related to the driver seat controls, ensuring the switch is securely connected, and testing the switch for continuity using a multimeter.
6. Will OBDII code B1820 GMC for the Driver Seat Recline Rearward Switch Circuit cause any safety concerns?
- While the code may not pose an immediate safety risk, having non-functional seat adjustments can affect your driving comfort and potentially impact your driving posture, leading to discomfort during long drives.
7. How urgent is it to address OBDII code B1820 GMC related to the Driver Seat Recline Rearward Switch Circuit?
- It is recommended to address the issue promptly to maintain the functionality and comfort of the driver seat. Ignoring the problem may lead to further damage or inconvenience while driving.
8. Can a faulty seat control module cause OBDII code B1820 GMC for the Driver Seat Recline Rearward Switch Circuit?
- Yes, a malfunctioning seat control module can trigger the B1820 code if it fails to communicate properly with the recline rearward switch or if there are internal faults within the module.
9. Are there any specific vehicle models under GMC that are more prone to experiencing OBDII code B1820 for the Driver Seat Recline Rearward Switch Circuit?
- The B1820 code related to the driver seat recline rearward switch circuit can occur in various GMC models equipped with power adjustable driver seats, such as the GMC Sierra, Yukon, Acadia, and Terrain.
10. How can I prevent OBDII code B1820 GMC from occurring again after repairing the issue with the Driver Seat Recline Rearward Switch Circuit?
- To prevent the code from reoccurring, ensure proper installation of any replacement components, regularly check the condition of the wiring and connectors, and avoid putting excessive pressure on the seat controls during use.
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