AutoCodes – GMC – B269C 2017 GMC Sierra

B269C 2017 GMC Sierra Code - Heater Coolant Pump Control Circuit Low

Quick Answer

The coolant heater pump is controlled by a relay. Common causes include Faulty Heater Coolant Pump, Heater Coolant Pump harness is open or shorted, Heater Coolant Pump 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: B269C 2017 GMC Sierra indicates Heater Coolant Pump Control Circuit Low.
Common causes: Common causes include Faulty Heater Coolant Pump, Heater Coolant Pump harness is open or shorted, Heater Coolant Pump 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 186

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 May 29, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B269C 2017 GMC Sierra Description

The coolant heater pump is controlled by a relay. When operating conditions exist that require coolant flow when the engine is not operating, the Heating, Ventilation, and Air Conditioning (HVAC) control module turns ON the heater coolant pump by applying ground to the relay control circuit which energizes the heater coolant pump relay.

OBDII Code B269C 2017 GMC Sierra - Heater Coolant Pump Control Circuit Low - AutoCodes.com — B269C 2017 GMC Sierra Code - Heater Coolant Pump Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC B269C 2017 GMC Sierra?

Faulty Heater Coolant Pump
Heater Coolant Pump harness is open or shorted
Heater Coolant Pump circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC B269C 2017 GMC Sierra?

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 B269C 2017 GMC Sierra 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.

Need more information about the B269C 2017 GMC Sierra code?

Need more information on how to fix the B269C 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B269C 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 B269C 2017 GMC Sierra Code

What does OBDII code B269C mean for a 2017 GMC Sierra?

B269C indicates a problem with the heater coolant pump control circuit, specifically that the circuit signal is low, suggesting a potential issue with the pump or its wiring.

What are the common symptoms of the B269C code?

Common symptoms may include a malfunctioning heating system, poor cabin heating performance, or the check engine light being illuminated on the dashboard.

What can cause the B269C code to trigger?

Possible causes include a faulty heater coolant pump, damaged wiring or connectors in the control circuit, or issues with the vehicle's engine control module (ECM).

How can I diagnose the B269C code?

Diagnosing B269C typically involves using an OBDII scanner to confirm the code, visually inspecting the coolant pump and wiring, and testing the pump's operation with a multimeter.

What should I check first when troubleshooting B269C?

Start by inspecting the wiring and connectors for any signs of damage or corrosion, as these are common issues that can lead to a low circuit signal.

Can I drive my GMC Sierra with the B269C code?

While it may be possible to drive the vehicle, it is not recommended as a malfunctioning heater coolant pump can lead to further engine overheating or other heating system failures.

What are some repair options for code B269C?

Repair options may include replacing the heater coolant pump, repairing or replacing damaged wiring or connectors, or addressing any issues with the ECM.

How much does it typically cost to fix a B269C code?

Repair costs can vary widely depending on the specific issue, but replacing a heater coolant pump can range from $200 to $600, including parts and labor.

Is it safe to ignore the B269C code?

Ignoring the B269C code is not advisable, as it can lead to inadequate heating and potential engine overheating, which can cause more severe damage over time.

Will clearing the code B269C fix the problem?

Clearing the code may temporarily turn off the check engine light, but it will not fix the underlying issue. Proper diagnosis and repair are necessary to resolve the problem.