2006-2011 Lucerne & DTS Hood Latch: Solving Remote Start Failure and Latching Problems
This guide explains the critical difference between the two hood latch versions for the 2006-2011 Buick Lucerne and Cadillac DTS and how a failure can disable your remote start.
- There are two versions of this latch: one WITH an electrical sensor for remote start, and one WITHOUT. You must install the correct one.
- A faulty hood latch sensor is a primary cause for the factory remote start system to stop working.
- Symptoms of failure can be mechanical (hood won't close/open) or electrical ('Hood Ajar' light, remote start fails).
- Driving with a faulty latch is extremely dangerous; a hood that opens at speed can cause a total loss of visibility and a serious accident.
Symptoms of a Failing Hood Latch
A failing hood latch on a Buick Lucerne or Cadillac DTS can present with either mechanical or electrical symptoms. It is crucial to address these signs immediately, as a complete failure can be extremely dangerous.
Mechanical Failure Symptoms
- Hood Won't Close or Latch: The hood bounces back up when you try to close it, or it never fully clicks into place. This can be caused by a worn-out spring, bent components, or debris in the mechanism.
- Hood is Difficult to Open: The release lever inside the cabin feels stiff, or you have to pull it multiple times to get the hood to pop. This often points to a stretched cable or a corroded latch mechanism.
- Hood Rattles or Feels Loose: While driving, you may hear rattling from the front of the car or notice the hood vibrating. This indicates the latch is not holding the hood down securely.
- Hood Pops Open While Driving: This is the most critical failure. If the primary latch fails, the hood may fly open unexpectedly, held only by the secondary catch, or it could open completely, obstructing vision and causing a major safety hazard.
Electrical Failure Symptoms (Remote Start Models Only)
- Remote Start Inoperative: The most common electrical symptom is that the factory remote start feature stops working. The vehicle's computer will not allow the engine to start if it cannot confirm the hood is closed.
- 'Hood Ajar' or 'Hood Open' Message: A persistent warning message may appear on the driver information center (DIC) even when the hood is fully closed. This is caused by a faulty sensor within the latch assembly.
Warning: Never drive a vehicle with a hood that does not securely latch. Airflow at speed can force the hood open, causing it to smash the windshield and completely block your vision, leading to a high risk of a serious crash.
Known Issues, Recalls, and TSBs
As of mid-2024, there are no specific recalls or Technical Service Bulletins (TSBs) from the NHTSA or GM that directly address hood latch failure on the 2006-2011 Buick Lucerne or Cadillac DTS. While other GM vehicles have had TSBs for similar issues, these specific models are not covered by them. The problems seen on the Lucerne and DTS are typically related to normal wear and tear or individual component failure.
Variant Differences: Remote Start vs. No Remote Start
The single most important factor when replacing this part is determining if the vehicle has factory remote start. This option dictates which latch is required.
- With Remote Start: The latch assembly will have an integrated electrical switch and a wiring pigtail with a connector. This switch is essential for the remote start system's safety logic.
- Without Remote Start: The latch is a purely mechanical part with no wires or electrical connectors.
Pro Tip: Before ordering, visually inspect your existing hood latch. If you see a wire and an electrical plug coming from it, you need the version for vehicles with remote start. If there are no wires, you need the standard mechanical version.
Buying a Used Hood Latch
A used OEM hood latch is an excellent, cost-effective option, as genuine GM parts often have better build quality and fitment than cheap aftermarket alternatives. However, careful inspection is key.
What to Check Before Buying:
- Verify Compatibility: First, confirm if you need the remote start or non-remote start version. A latch without the electrical switch cannot be used on a car that needs it; your remote start will not work.
- Inspect for Physical Damage: Look for any signs of bending, cracks, or heavy impact. A latch from a vehicle involved in a front-end collision should be avoided, even if it looks okay.
- Check for Corrosion: Heavy rust or corrosion can cause the mechanism to bind or fail. Check the springs and moving parts for smooth operation.
- Test the Mechanism: Use a screwdriver to manually cycle the latching mechanism. It should snap shut decisively and release smoothly when the lever is moved.
- Examine the Electrical Connector (if applicable): For remote start versions, ensure the connector and wiring are not damaged, cut, or corroded.
Replacement Overview
Replacing the hood latch on a Buick Lucerne or Cadillac DTS is a relatively simple task suitable for a DIYer with basic tools.
- Difficulty: 2 out of 5
- Estimated Time: 0.5 - 1 hour
- Tools Needed: Socket set (typically 10mm or 13mm), trim removal tool, flathead screwdriver.
Basic Steps:
- Open the hood and prop it securely.
- Remove the plastic radiator shroud cover by prying out the push-pins.
- Pro Tip: Use a marker or scribe to trace the outline of the old latch on the radiator support. This will make aligning the new latch much easier.
- Disconnect the electrical connector, if present.
- Disconnect the hood release cable from the latch mechanism.
- Unbolt the two or three bolts holding the latch to the radiator support and remove it.
- Install the new latch, loosely tightening the bolts. Align it with the marks you made earlier, then fully tighten the bolts.
- Reconnect the release cable and electrical connector.
- Test the operation by closing and opening the hood several times before reinstalling the radiator shroud.
Cost Comparison
| Part Type | Price Range |
|---|---|
| New OEM (Dealer) | $110 - $170 |
| New Aftermarket | $30 - $80 |
| Used OEM | $35 - $75 |
| Shop Labor | $80 - $120 |
Frequently Asked Questions
Why did my remote start stop working after my hood latch failed?
The factory remote start system uses a sensor in the hood latch as a safety feature. If the sensor fails or the computer thinks the hood is open, it will prevent the engine from starting remotely. Replacing the faulty latch with the correct version (for remote start) will resolve this issue.
Can I just lubricate my sticky latch instead of replacing it?
Sometimes, cleaning and lubricating a sticky latch with penetrating oil followed by white lithium grease can restore function, especially if the issue is minor corrosion or dirt buildup. However, if the latch is physically broken, bent, or the internal electrical sensor has failed, lubrication will not fix it and replacement is necessary.
Can I use a cheaper latch from a car without remote start on my car that has it?
No. While the mechanical part might fit, it lacks the electrical sensor. Your car's computer will not receive the 'hood closed' signal, and your remote start will be permanently disabled until the correct latch is installed.
Is the replacement process different for the Buick Lucerne and Cadillac DTS?
No, the process is virtually identical. Both vehicles are built on a shared platform and use the same core support structure where the latch is mounted, meaning the location, bolts, and connections are the same.
Technical Specifications
OEM Part Numbers: 15895471 15895472 20763599 20906015 25768922 25794830 25794882
Two variants exist: a purely mechanical latch, and a latch with an integrated electrical switch and connector for vehicles with factory remote start.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Buick Lucerne:
- Cadillac DTS:
- 🛍️ Shop This Part
- Symptoms of a Failing Hood Latch
- Mechanical Failure Symptoms
- Electrical Failure Symptoms (Remote Start Models Only)
- Known Issues, Recalls, and TSBs
- Variant Differences: Remote Start vs. No Remote Start
- Buying a Used Hood Latch
- What to Check Before Buying:
- Replacement Overview
- Basic Steps:
- Cost Comparison
- Frequently Asked Questions
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