2007-2012 Enclave, Acadia, Traverse & Outlook Hood Latch: Fixing the 'Hood Ajar' Warning and Remote Start Failure

Symptoms of a Failing Hood Latch Assembly

The primary failure point on the hood latch for the Buick Enclave, GMC Acadia, Chevrolet Traverse, and Saturn Outlook is almost always the integrated electrical sensor, not the mechanical latch itself. This leads to a distinct set of electrical symptoms.

• "Hood Ajar" Warning Light: The most common symptom is a persistent "Hood Open" or "Hood Ajar" message on the instrument cluster, even when the hood is securely closed. This is a direct result of the faulty sensor sending an incorrect signal.
• Remote Start Not Working: As a safety precaution, the remote start system is automatically disabled if the vehicle thinks the hood is open. Many owners first discover the faulty latch when their remote start suddenly stops working.
• Random Car Alarm: The security system monitors the hood switch. A faulty switch can randomly signal that the hood has been opened, triggering the vehicle's alarm, often at inconvenient times like the middle of the night.
• Dome Lights Staying On: On some vehicles, an open hood signal can cause the interior dome lights to remain on, potentially draining the battery.
• Mechanical Latching Issues: While less common, the mechanical parts of the latch can still fail. Symptoms include a hood that is difficult to close, won't latch securely, rattles while driving, or is hard to open with the interior release. This can be caused by rust, debris, or damage from a minor collision.

Known Issues, TSBs, and Recalls

As of this writing, there are no specific recalls or Technical Service Bulletins (TSBs) from GM or the NHTSA that address the failure of the hood latch assembly or its integrated sensor on the 2008-2012 Buick Enclave, 2007-2012 GMC Acadia, or their platform siblings. Searches of the NHTSA database show recalls for other components on these vehicles, such as power liftgate struts and airbag wiring, but none for this specific part.

Diagnosing the Hood Ajar Sensor

If you are experiencing the "Hood Ajar" warning, you can confirm the latch sensor is the problem before buying a new part. A detailed diagnostic procedure involves testing the switch and its circuits with a multimeter.

1. Disconnect the Sensor: Open the hood and locate the hood latch at the front of the engine bay. Disconnect the electrical harness connector from the latch assembly.
2. Test the Switch: Set your multimeter to the resistance (Ohms) setting. With the hood open, test for continuity between specific pins on the switch itself. Then, manually close the latch mechanism (using a screwdriver to simulate the hood striker) and test again. The resistance should change from a low reading (less than 2 ohms) to infinite, or vice-versa, depending on the pins being tested. If the switch's resistance does not change, it is faulty and the entire latch assembly needs to be replaced.
3. Test the Circuit: If the switch tests good, the problem may be in the vehicle's wiring or the Body Control Module (BCM). This involves checking for proper voltage (around 12V) and ground at the connector that plugs into the latch.

Buying a Used Hood Latch Assembly

A used OEM hood latch is an excellent, cost-effective solution for this common problem. Since the failure is electronic, a used part from a lower-mileage vehicle can provide years of service at a fraction of the cost of a new part. Here's what to look for:

• Verify Compatibility: Ensure the latch is from a 2008-2012 Buick Enclave, 2007-2012 GMC Acadia, 2009-2012 Chevrolet Traverse, or 2007-2010 Saturn Outlook. The key is to match the part number. The most current OEM part number is 20765681, which replaces the older part number 10363559.
• Physical Inspection: Check the electrical connector pins for any signs of corrosion (green or white powder). Look at the mechanical parts for heavy rust or physical damage. The mechanism should move freely when you manually operate it.
• Ask for a Functionality Guarantee: When buying from a recycler, ask if the part has been tested or if they offer a warranty that covers electronic failure. A good seller will stand behind the part if it doesn't solve your "Hood Ajar" issue.
• Why Used OEM is a Good Choice: For a part with integrated electronics, a genuine used GM part is often more reliable than a cheap new aftermarket alternative. The quality of the switch and plastics in the OEM part is known, whereas some aftermarket sensors can have a high failure rate.

Replacement Information

Replacing the hood latch assembly is a straightforward job that most DIY mechanics can complete in under 30 minutes with basic tools.

• Difficulty: 1/5 (Very Easy)
• Estimated Time: 0.5 hours
• Tools Needed: Ratchet and socket set, possibly a Torx bit (e.g., T30).

Step-by-Step Replacement Guide:

1. Open the Hood: Secure the hood in the open position with the prop rod.
2. Remove Trim (if necessary): You may need to remove a plastic radiator shroud or grille cover to access the latch. These are typically held on by simple plastic push-clips.
3. Mark the Position: Before unbolting the old latch, use a marker to trace its outline on the radiator support. This will make aligning the new latch much easier.
4. Unbolt the Latch: There are typically two or three bolts holding the latch assembly in place. Remove them with a socket or Torx driver.
5. Disconnect Components: Disconnect the electrical connector for the hood ajar switch. Then, carefully unhook the hood release cable from the latch mechanism.
6. Install the New Latch: Installation is the reverse of removal. Connect the release cable and electrical connector to the new latch first. Then, bolt the new latch into place, using your alignment marks as a guide.
7. Test Operation: Before closing the hood, have a helper pull the interior release handle while you watch the new latch to ensure the cable is working. Start the car to confirm the "Hood Ajar" light is off. Finally, close the hood and ensure it latches securely. Test your remote start to confirm it is working again.

Cost Comparison

The cost to fix this issue varies significantly depending on whether you do it yourself or use a repair shop.

Frequently Asked Questions (FAQ)