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P279B 2017 Chevrolet Silverado Code - Four Wheel Drive Low Range Performance

Quick Answer

The diagnostic trouble code P279B for a 2017 Chevrolet Silverado indicates an issue with the performance of the four-wheel-drive low range system. Common causes include Faulty four-wheel-drive control module, Malfunctioning transfer case actuator, Wiring or electrical issues in the low range system. 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
P279B 2017 Chevrolet Silverado indicates Four Wheel Drive Low Range Performance .
Common causes
Common causes include Faulty four-wheel-drive control module, Malfunctioning transfer case actuator, Wiring or electrical issues in the low range system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P279B 2017 Chevrolet Silverado Description

The diagnostic trouble code P279B for a 2017 Chevrolet Silverado indicates an issue with the performance of the four-wheel-drive low range system. This system allows the vehicle to operate in low gear ratios for increased torque and traction, particularly useful for off-road driving or towing heavy loads. When this code is triggered, it means that the control module has detected a problem with the low range operation, which can impact the vehicle's performance and drivability.

OBDII Code P279B 2017 Chevrolet Silverado - Four Wheel Drive Low Range Performance
P279B 2017 Chevrolet Silverado Code - Four Wheel Drive Low Range Performance

Common Causes of P279B 2017 Chevrolet Silverado

  1. Faulty four-wheel-drive control module
  2. Malfunctioning transfer case actuator
  3. Wiring or electrical issues in the low range system
  4. Mechanical problems in the transfer case or drivetrain components

Symptoms of P279B 2017 Chevrolet Silverado

  1. Difficulty engaging or disengaging four-wheel-drive low range mode
  2. Reduced traction and power in low range operation
  3. Illumination of the four-wheel-drive warning light on the dashboard
  4. Unusual noises or vibrations when using low range mode

How to Fix P279B 2017 Chevrolet Silverado

  1. Begin by diagnosing the specific cause of the issue using a professional diagnostic scan tool to retrieve the trouble codes and pinpoint the problem area.
  2. Inspect the four-wheel-drive control module, transfer case actuator, and related wiring for any signs of damage or malfunction.
  3. Test the operation of the low range system to determine if the issue lies in the electronic controls or mechanical components.
  4. Replace any faulty components such as the control module, actuator, or damaged wiring to restore proper operation of the four-wheel-drive low range system.
  5. Clear the trouble codes from the vehicle's computer system and test the system to ensure that the issue has been resolved.

Cost to Fix P279B 2017 Chevrolet Silverado

The typical repair costs for addressing a four-wheel-drive low range performance issue can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, the cost of parts such as a new control module or transfer case actuator can range from $200 to $600, while labor costs can add another $200 to $400 to the total repair bill. Overall, the total cost for resolving this issue could range from $400 to $1000, but it's important to note that actual costs may vary based on factors such as location, vehicle make and model, and the specific repair shop's labor rates. It's advisable to consult with a trusted mechanic or repair shop for a more accurate estimate based on your individual circumstances.

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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 P279B 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P279B in a 2017 Chevrolet Silverado related to Four Wheel Drive Low Range Performance?

- Common symptoms may include difficulty engaging or disengaging the four-wheel-drive low range mode, erratic shifting behavior, and a warning light on the dashboard.

2. What are some possible causes of OBDII code P279B in a 2017 Chevrolet Silverado?

- Possible causes may include a faulty transfer case motor, damaged wiring or connectors, low transfer case fluid level, or a malfunctioning control module.

3. How can I diagnose the issue causing OBDII code P279B in my 2017 Chevrolet Silverado?

- A thorough diagnostic scan using an OBDII scanner can help pinpoint the specific issue. Additionally, inspecting the transfer case components and related wiring for any visible damage is recommended.

4. Can I continue driving my 2017 Chevrolet Silverado with OBDII code P279B present?

- It is not recommended to continue driving the vehicle with this code present, as it may lead to further damage to the transfer case components and affect the vehicle's drivability.

5. What are some repair tips for addressing OBDII code P279B in a 2017 Chevrolet Silverado?

- Repair tips may include checking and replenishing the transfer case fluid, inspecting and repairing any damaged wiring or connectors, and replacing the transfer case motor if necessary.

6. Is it possible to reset OBDII code P279B in a 2017 Chevrolet Silverado without fixing the underlying issue?

- While clearing the code temporarily may reset the warning light, it is crucial to address the root cause of the problem to prevent the code from reoccurring.

7. How much does it typically cost to repair OBDII code P279B in a 2017 Chevrolet Silverado?

- The cost of repair can vary depending on the specific issue causing the code and the labor rates in your area. It is advisable to consult with a qualified mechanic for an accurate estimate.

8. Can extreme weather conditions impact the performance of the four-wheel-drive low range system in a 2017 Chevrolet Silverado?

- Yes, extreme cold or hot weather conditions can affect the operation of the transfer case components, potentially leading to issues that trigger OBDII code P279B.

9. Are there any preventive maintenance measures I can take to avoid encountering OBDII code P279B in my 2017 Chevrolet Silverado?

- Regularly checking the transfer case fluid level, inspecting the wiring for signs of wear, and following the manufacturer's recommended maintenance schedule can help prevent issues related to this code.

10. How long does it typically take to repair OBDII code P279B in a 2017 Chevrolet Silverado?

- The repair time can vary depending on the complexity of the issue causing the code and the availability of parts. In some cases, the repair may be completed within a few hours, while more complex issues may take longer to diagnose and fix.

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