B2745 GMC Code - Traction Control Switch Circuit
Quick Answer
The Body Control Module (BCM) monitors the signal circuit from the traction control switch. Common causes include Faulty Multifunction Switch Instrument Panel, Multifunction Switch Instrument Panel harness is open or shorted, Multifunction Switch Instrument Panel 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
- B2745 GMC indicates Traction Control Switch Circuit.
- Common causes
- Common causes include Faulty Multifunction Switch Instrument Panel, Multifunction Switch Instrument Panel harness is open or shorted, Multifunction Switch Instrument Panel 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 B2745 GMC Description
When the traction control switch is pressed and held for 5 s, the body control module will request the electronic brake control module to disable the traction control and the electronic stability control. The electronic brake control module will request the instrument cluster via serial data to turn the traction control off and stability control off indicator ON to notify the driver of the deactivation. The Diagnostic Trouble Code (DTC) sets when the BCM detects a problem in the signal circuit.
What are the Possible Causes of the DTC B2745 GMC?
- Faulty Multifunction Switch Instrument Panel
- Multifunction Switch Instrument Panel harness is open or shorted
- Multifunction Switch Instrument Panel circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B2745 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 B2745 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
- B2745 2014 GMC Sierra — Traction Control Switch Circuit
- B2745 2015 GMC Sierra — Traction Control Switch Circuit
- B2745 2016 GMC Sierra — Traction Control Switch Circuit
- B2745 2017 GMC Sierra — Traction Control Switch Circuit
- B2745 2018 GMC Sierra — Traction Control Switch Circuit
Frequently Asked Questions about B2745 GMC Code
1. What does the OBDII code B2745 mean on a GMC?
The B2745 code indicates an issue with the Traction Control Switch Circuit, meaning there’s a malfunction in the electrical circuitry associated with the traction control switch.
2. What are the common symptoms of a B2745 code?
Symptoms may include the traction control system not engaging or turning off, the traction control warning light illuminating, or intermittent switch functionality.
3. What causes the B2745 code to appear?
Common causes include a faulty traction control switch, damaged or corroded wiring, loose electrical connections, or a malfunctioning control module.
4. Can a B2745 code affect vehicle performance?
Yes, the traction control system may not function properly, which could reduce stability and control in slippery or low-traction conditions.
5. How is a B2745 code diagnosed?
Diagnosis typically involves inspecting the traction control switch, checking the wiring and connectors for damage, and using a multimeter to test circuit continuity.
6. Can I continue driving with the B2745 code active?
While the vehicle may still be drivable, it’s recommended to address the issue promptly, as the traction control system may not operate correctly in critical situations.
7. How do you fix a B2745 code on a GMC?
Repairs may include replacing the traction control switch, repairing or replacing damaged wires or connectors, or reprogramming or replacing the control module if necessary.
8. Is the B2745 code related to any other systems?
Yes, the code is linked to the traction control system, which interacts with the anti-lock braking system (ABS) and stability control.
9. What tools are needed to repair a B2745 code?
Basic tools include an OBDII scanner, a multimeter for electrical testing, and possibly wiring repair kits or replacement parts for the switch or connectors.
10. How much does it cost to repair a B2745 code on a GMC?
Costs can vary depending on the issue. Replacing the traction control switch may cost $50–$150 for parts, plus labor, while more extensive wiring repairs or module replacements could cost hundreds of dollars.
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