Chevrolet Equinox Technical Service Bulletins Explained
That “Service AWD” message or a mysterious water leak on your passenger floor might not be random bad luck—it’s likely a documented issue, and knowing the right TSB number can save you time and money.
There’s a certain frustration that comes with a new problem in your Equinox, especially when the service advisor says “we couldn’t find anything.” But the Equinox, especially newer models and the EV, has a few documented gremlins that Chevrolet has officially acknowledged. Here’s the thing about TSBs for the Equinox—they cover everything from finicky AWD systems to flex plates that fail prematurely. Knowing them puts you in control.
New Model Software & Mechanical TSBs (2024–2025+)
The newest Equinox models, particularly the EV, are rolling out with advanced electronics, which means a new generation of software-related TSBs.
🟡 Turn Signal Won’t Cancel (TSB 24-NA-143)
A common complaint on 2024 Equinox EVs is that the turn signal doesn’t turn off automatically after completing a turn or the signal over-cancels, blinking in the opposite direction .
Cause and Fix: TSB 24-NA-143 identifies this as a software issue requiring a Body Control Module (BCM) reprogramming to correct the signal logic .
🔧 Wet Passenger Carpet (TSB 25-NA-149)
Some 2024 Equinox EV owners have discovered water pooling on the front passenger floor. This is often traced back to an air conditioning drain line that is blocked, disconnected, or improperly routed during manufacturing .
Cause and Fix: TSB 25-NA-149 was issued to diagnose and repair this leak. Technicians should inspect the A/C drain and ensure the cabin is completely dried out to prevent mold .
⚠️ Service High Voltage Battery (TSB 26-NA-031)
A high-voltage battery warning light can be alarming, but in some cases, it’s a software glitch rather than a hardware failure .
Cause and Fix: TSB 26-NA-031 addresses this “Service vehicle high voltage battery” notification with a software update to prevent the car from suddenly losing power or failing to start .
📱 Infotainment & Telematics Issues
Reports also indicate that TSBs exist for infotainment blackouts and telematics module failures on the Equinox EV, often resolved by module reprogramming .
Drivetrain & Engine TSBs (2018–2025)
These TSBs cover internal combustion engine (ICE) models and some hybrid drivetrain concerns.
🔧 Service AWD Message (PIT6270 & PIT5580)
The AWD system in the Equinox has been the subject of multiple technical bulletins:
2025 Models:
TSB PIT6270 addresses a “Service AWD” message on the DIC with DTC C11B7-96 stored. Engineering has identified a software issue within the Rear Differential Clutch Control Module .
2018 Models:
TSB PIT5580 covers the same “Service AWD” message with DTC’s C0407 SYM01, C0407 SYM5A, and C056D SYM54. This is a calibration anomaly, and dealers are advised not to replace parts at this time, clearing codes and releasing the vehicle to the customer .
🎯 Flex Plate Failure (TSB 21-NA-276)
Flex plate failure is a known issue for the 2019 Equinox 2.0T. The flex plate can develop cracks or have teeth shear off, which can cause a ticking noise on startup .
Cause and Fix: TSB 21-NA-276 acknowledges that the flex plate may fail prematurely, sometimes exacerbated by the stress of stop/start technology. Replacing the flex plate is a significant job (often over $2,000) that involves dropping the subframe . Some owners report disabling the Auto Stop/Start feature to reduce stress on the part.
📋 Older Generation TSBs (2005+)
For older Equinox models (like the 2005 V6 3.4L), common TSBs address :
- Engine Compartment Coolant Odors
- Oil Leaks from the Crankshaft Rear Main Seal
- Shift/Driveability Concerns and the MIL ON
- DTC’s set by various control modules
How to Find TSBs for Your Equinox
- NHTSA.gov: The best place to start. Enter your VIN to see all official recalls and TSBs.
- Dealership Service: When you bring your car in, mention the specific TSB number you found.
- Owner Forums: Sites like the Chevy Equinox Forum are great for seeing which TSBs are affecting real-world owners.
FAQ: Your Equinox TSB Questions Answered
1. What is TSB 24-NA-143 for the Equinox EV?
It’s a Body Control Module software update to fix a turn signal issue where the signal doesn’t cancel properly .
2. What does TSB 25-NA-149 cover?
TSB 25-NA-149 addresses a water leak on the front passenger floor, caused by a disconnected or blocked A/C drain line .
3. What is TSB 21-NA-276 for the Equinox?
This TSB documents a known failure of the flex plate (flywheel) on the 2019 Equinox 2.0T, which can cause a ticking noise or starting issues .
4. Why did I get a “Service AWD” message?
Preliminary information (PIT6270) suggests a software issue with the rear differential control module, though a permanent fix is still under investigation .
5. What is TSB 26-NA-031?
This TSB provides a software update to fix a false “Service Vehicle High Voltage Battery” alert on the Equinox EV .
Knowing the right TSB number can turn a frustrating dealership visit into a quick, straightforward fix. It proves the problem isn’t just your imagination—it’s a known condition with a factory-backed solution.
Have you run into any of these issues with your Equinox? Drop your experience in the comments below—it helps other owners know what to expect.
References & Further Reading:
