B1004 GMC Code - Keep Alive Memory
Quick Answer
The B1004 diagnostic trouble code (DTC) for GMC vehicles refers to an issue with the Keep Alive Memory (KAM) in the vehicle's onboard computer system. Common causes include Failed or weak battery within the ECM, Faulty ECM, Wiring or connectivity issues. 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
- B1004 GMC indicates Keep Alive Memory.
- Common causes
- Common causes include Failed or weak battery within the ECM, Faulty ECM, Wiring or connectivity issues.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code B1004 GMC Description
The B1004 diagnostic trouble code (DTC) for GMC vehicles refers to an issue with the Keep Alive Memory (KAM) in the vehicle's onboard computer system. The KAM is a small amount of memory that stores essential data even when the vehicle is turned off, such as fuel trim values, idle air control settings, and other learned parameters. This information is crucial for the proper functioning of the engine and emission control systems.
Common Causes of B1004 GMC
- Failed or weak battery within the ECM
- Faulty ECM
- Wiring or connectivity issues
- Power surges or electrical problems
- Extreme temperature fluctuations
Symptoms of B1004 GMC
- Rough idle or stalling
- Difficulty starting the engine
- Poor fuel economy
- Check Engine Light illuminated
- Failed emissions test
How to Fix B1004 GMC
- Use a diagnostic scan tool to retrieve the B1004 code and confirm the issue with the KAM.
- Inspect the battery within the ECM for proper voltage and connection.
- Check the ECM for any signs of damage or malfunction.
- Test the wiring and connections to ensure there are no breaks or shorts.
- Reset the KAM and reprogram the ECM with the correct settings if necessary.
Cost to Fix B1004 GMC
The cost of repairing a B1004 code related to the Keep Alive Memory can vary depending on the specific cause of the issue. In general, the cost of parts for this repair can range from $50 to $200, with labor costs adding an additional $80 to $150 per hour. The total repair cost could be anywhere from $150 to $500, but it's important to note that prices may vary based on location, vehicle make and model, and the shop's labor rates. It's recommended to consult with a qualified mechanic to get an accurate estimate for your specific situation.
Tech Notes for B1004 GMC
Need more information about the B1004 GMC code?
Need more information on how to fix the B1004 GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1004 GMC code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B1004 GMC Code
1. What does OBDII code B1004 GMC mean?
The code B1004 GMC refers to a Keep Alive Memory error, indicating an issue with the vehicle's memory retention system.
2. What are the common symptoms of OBDII code B1004 GMC?
Common symptoms of code B1004 GMC include difficulty starting the vehicle, loss of radio presets, clock resetting, and the need to reprogram keyless entry systems.
3. What are the possible causes of OBDII code B1004 GMC?
Possible causes of code B1004 GMC can include a faulty body control module (BCM), a drained or faulty battery, poor electrical connections, or a malfunctioning Keep Alive Memory circuit.
4. How do I diagnose OBDII code B1004 GMC?
Diagnosing code B1004 GMC typically involves using an OBDII scanner to retrieve the code, checking the vehicle's battery voltage and connections, inspecting the BCM and related wiring, and performing a system reset if necessary.
5. How can I repair OBDII code B1004 GMC?
To repair code B1004 GMC, you may need to replace a faulty BCM, repair any damaged wiring or connections, ensure the battery is in good condition, and perform a system reset to clear the error code.
6. Can I drive my vehicle with OBDII code B1004 GMC?
It is generally safe to drive your vehicle with code B1004 GMC, but it is recommended to address the issue promptly to prevent further electrical problems and ensure proper vehicle operation.
7. Will resetting the OBDII code B1004 GMC fix the issue?
Resetting the code may temporarily clear the error, but if the underlying issue such as a faulty BCM or battery problem persists, the code is likely to reappear. It's important to diagnose and repair the root cause.
8. How much does it cost to repair OBDII code B1004 GMC?
The cost of repairing code B1004 GMC can vary depending on the specific cause of the issue, the extent of the repairs needed, and labor rates in your area. It's recommended to consult a professional mechanic for an accurate estimate.
9. Can a DIY enthusiast fix OBDII code B1004 GMC?
While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing code B1004 GMC may require specialized tools and expertise. It's advisable to seek professional help for complex electrical issues.
10. How often does OBDII code B1004 GMC occur in GMC vehicles?
Code B1004 GMC related to Keep Alive Memory issues is relatively uncommon but can occur in GMC vehicles due to various electrical and component failures. Regular vehicle maintenance can help prevent such issues.
Discuss the causes and fixes for B1004 GMC OBDII Code
Code B1004 GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.