2017-2026 GM Ignition Switch Guide: Enclave, Acadia, XT5, Traverse No-Start & Programming

Symptoms of a Failing Ignition Switch

A problem with the push-to-start button can mimic other, more common issues like a dead battery. It's important to recognize the specific signs of a failing switch. Always check that your vehicle's main 12V battery is fully charged and that your key fob battery is good before suspecting the ignition switch.

• Engine Will Not Crank: The most common symptom is a complete no-start condition. You press the button, the dashboard lights may or may not flicker, but the engine does not turn over.
• Intermittent Starting: The vehicle may start perfectly one time and then fail to start the next, with no warning. This can be caused by failing internal contacts within the switch.
• Starts and Immediately Stalls: The switch might provide enough power to start the engine, but a faulty connection can cause it to immediately cut power to the fuel or ignition system, causing a stall. This can also be a symptom of the anti-theft system not recognizing the switch.
• Accessories Don't Work Correctly: The radio, climate control, or power windows may not turn on when the button is pressed to the 'Accessory' or 'ON' position.
• Dashboard Lights Flicker or Don't Turn On: When you enter the vehicle or press the button, the instrument cluster may remain dark or flicker erratically, indicating a poor electrical connection from the switch.

Is It the Ignition Switch or Something Else?

Many no-start issues are not caused by the ignition switch. Before replacing it, rule out these common culprits:

• Dead 12V Battery: The most frequent cause of a no-start. If the dashboard lights are very dim or you hear a rapid clicking sound, the battery is the likely problem.
• Dead Key Fob Battery: If the vehicle doesn't detect the key fob, it won't start. Most vehicles have a specific spot in the center console or steering column to place a fob with a dead battery for an emergency start. Check your owner's manual for this procedure.
• Faulty Starter or Alternator: A single, loud click might point to a bad starter, while a car that dies while running often points to a bad alternator.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

While there are no specific recalls for the ignition switch itself on these vehicles, several other recalls can cause symptoms like stalling or a no-start condition that might be misdiagnosed as a switch failure.

• Fuel Pump Recall (NHTSA #20V639): Certain 2020 Enclave, Acadia, Traverse, and XT5 models were recalled for a fuel pump that could have a manufacturing defect, leading to insufficient fuel supply and a potential engine stall.
• Transmission Accumulator Recall (NHTSA #20V668): A wide range of 2018-2020 GM vehicles, including the Enclave, Acadia, and Traverse, were recalled for missing bolts on the start-stop accumulator. This could cause a transmission fluid leak and a loss of propulsion.
• Cadillac XT5 TCM TSB (GM #18237): Some 2017-2018 XT5s had a voluntary emissions recall to reprogram the Transmission Control Module (TCM). One symptom was the transmission getting stuck in gear, which could only be cleared by cycling the ignition off and on.

Always check your vehicle's VIN on the NHTSA website to see if any open recalls apply, as these repairs will be performed by a dealer for free.

Compatibility and Part Numbers

This push-button ignition switch is shared across several GM SUVs, but there are critical compatibility details to be aware of before purchasing a replacement.

Buying a Used Ignition Switch

Purchasing a used OEM ignition switch can be a cost-effective option, but there are important considerations.

• Confirm the Part Number: Make sure the part number on the used switch (13547347 or 23400951) exactly matches the one you are replacing.
• Inspect for Damage: Check for any cracks in the plastic housing, bent pins in the electrical connector, or excessive wear on the button itself.
• Programming is NOT Optional: Buying a used switch does not allow you to bypass the need for programming. The switch is a security component and must be electronically paired to your vehicle's BCM and immobilizer system by a professional.
• Why Used OEM is a Good Choice: For an electronic part like this, a used original equipment (OEM) switch is often more reliable than a cheap, new aftermarket part. The quality control and materials on the OEM part are designed to meet GM's original specifications.

Programming and Installation

Who Can Program the Switch?

Programming this ignition switch requires specialized software and tools. You have two main options:

1. GM Dealership: Any authorized GM dealer can perform the programming.
2. Qualified Independent Shop or Automotive Locksmith: Many high-end independent shops and certified automotive locksmiths have the necessary equipment, such as a subscription to GM's Techline Connect software and a J2534 pass-thru device, to perform the procedure.

A typical DIY mechanic or a shop without this specific software cannot program the switch. Simple key-learning procedures you might find online are for adding extra keys and will not work for replacing this module.

Installation Overview

The physical replacement of the switch is relatively simple. It is typically located on the dashboard to the right of the steering column and is held in by clips. The process generally involves:

1. Disconnecting the vehicle's battery.
2. Carefully prying away the surrounding dash trim panel.
3. Depressing the retaining clips on the old switch to remove it from the panel.
4. Disconnecting the electrical connector.
5. Connecting the new switch and snapping it into place.

However, the vehicle will be immobilized until the programming is completed.

Cost to Replace

The total cost includes the part itself, the physical installation labor, and the specialized programming labor.

Frequently Asked Questions (FAQ)