B3055 on 2007-2011 Buick Lucerne: No Start, Security Light Causes and Fixes

What's Unique About the 2007-2011 Buick LUCERNE

The Buick Lucerne from this era uses GM's Pass-Key III (PK3) transponder-based immobilizer system. While effective, this system is known for intermittent failures as components age. The primary point of failure is often not a complex computer, but the physical interaction between the key's transponder chip and the reader coil in the ignition cylinder. Over time, keys get worn or damaged, and the reader coil itself can fail, leading to the frustrating no-start condition described in code B3055. The system is sensitive enough that even a low vehicle battery can cause communication errors and trigger this code.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• Engine will not crank or start
• Engine starts briefly and then immediately stalls
• Security light is illuminated solid or flashing on the instrument cluster
• "Theft Attempted" or "Starting Disabled Due To Theft" message on the Driver Information Center (DIC)
• Intermittent starting problems that may seem random

Most Likely Causes

1. Worn, Damaged, or Incorrect Ignition Key 🔴 High Probability The transponder chip in the key head can be damaged from drops or simple wear. Keys with flip-out blades can also cause issues if not fully extended, misaligning the transponder with the reader. A severely worn or broken key blade can also fail to make proper contact.
   How to confirm: First, try using a known-good spare key. If the spare key works consistently, the original key is faulty. Also, inspect the key for any physical damage, like cracks in the plastic head or a loose blade.
   Typical fix: Replace the faulty key. A new key must be cut to match the ignition and then programmed to the vehicle's immobilizer system using a scan tool or the 30-minute relearn procedure.
   Est. part cost: $50-$150
2. Faulty Ignition Lock Cylinder Housing / Reader Coil 🟡 Medium Probability The reader coil (exciter coil) that surrounds the ignition cylinder is a fine wire winding that can break or develop intermittent connection issues over time, preventing it from energizing and reading the key's transponder.
   How to confirm: This is diagnosed by exclusion. If multiple known-good keys fail to start the vehicle, and the wiring appears intact, the reader coil is the likely culprit. A technician can test the circuit for proper resistance and signal.
   Typical fix: Replace the ignition lock cylinder housing which contains the reader coil. The system will then need to go through a key relearn procedure.
   Est. part cost: $70-$200
3. Interference from other RFID Devices ⚪ Low Probability The Pass-Key system operates on a low-power radio frequency (125 kHz) that can be disrupted by other strong RFID signals.
   How to confirm: Remove all other keys, key fobs, and RFID-enabled cards (like office access cards, gas station speed passes, or even some cell phone chargers) from the keychain and away from the ignition area. Try starting the car with only the single Buick key. If it starts, interference was the issue.
   Typical fix: Keep other RFID devices separate from the ignition key when starting the vehicle.
   Est. part cost: $0
4. Poor Connection or Damaged Wiring ⚪ Low Probability
   How to confirm: Visually inspect the wiring harness and connector at the base of the steering column leading to the ignition switch/reader coil. Look for any loose, corroded, or damaged wires. A multimeter can be used to check for continuity between the reader coil and the BCM.
   Typical fix: Repair the damaged section of the wiring harness or clean/tighten the connector.
   Est. part cost: $5-$50
5. Low Vehicle Battery Voltage ⚪ Low Probability
   How to confirm: Check the vehicle's battery voltage. A reading below 12.4 volts can cause various modules, including the BCM and TDM, to behave erratically and fail to communicate properly. A technician in one documented case found B3055 was present with a battery at only 10.5V; replacing the battery and programming a new key resolved the issue.
   Typical fix: Charge or replace the vehicle battery. Clear codes and re-test. A key relearn may be necessary after power is restored.
   Est. part cost: $150-$300

Rare But Worth Checking

• Failing Body Control Module (BCM): While rare, the BCM itself can fail. This should only be considered after all other possibilities (key, reader, wiring, battery) have been thoroughly ruled out, as it is an expensive repair requiring programming.

Diagnosis Steps

1. Scan for all DTCs in the BCM to see if other related codes are present.
2. Check the vehicle's battery voltage to ensure it is above 12.4 volts. A low battery can cause erratic module behavior and must be corrected before further diagnosis.
3. Remove all other keys and RFID devices (fobs, access cards, even some phone chargers) from the keychain and try starting again.
4. Try starting the vehicle with a known-good spare key. If it starts, the primary key is the problem.
5. Inspect the ignition key for any cracks or damage to the plastic head where the transponder chip resides.
6. If available, use a scan tool to monitor the BCM's transponder key data stream to see if it detects a key as 'Present' or 'Not Present'.
7. Inspect the wiring and connector for the ignition lock cylinder reader coil, located on the steering column.
8. If a new key is needed or the lock cylinder is replaced, perform the 30-minute key relearn procedure.
9. If all else fails, suspect a faulty reader coil or BCM. Professional diagnosis is recommended at this stage.

Parts You'll Likely Need

• Transponder Ignition Key (OEM #GM 15824471, 23372322 (Strattec B111-PT)) — The chip inside the key is the most common point of failure, either through damage or simple wear.
  Trusted brands: ACDelco, Strattec
  OEM price range: $70-$120
  Aftermarket price range: $20-$60
• Ignition Lock Housing with Passkey Sensor (OEM #GM 25832354 (ACDelco D14A1A or D1493F)) — This part contains the reader coil that communicates with the key. The coil can fail, preventing key detection.
  Trusted brands: ACDelco, Dorman (e.g., 924-719)
  OEM price range: $150-$250
  Aftermarket price range: $70-$150

Related Codes That Often Appear With This One

• B3060 — This code, 'Unprogrammed Transponder', often appears with B3055 as it relates to the same system failing to recognize the key.
• B3935 — This code, 'Transponder Authentication Failed', is another related immobilizer code indicating a failure in the key verification process.

Technical Service Bulletins (TSBs) & Recalls

• PIC5650M: Addresses intermittent no crank, no start, or start stall with security light on, associated with DTCs B3055, B3060, and B3935.
• PIC5650B/C/K: Multiple revisions of a TSB that warn about RFID/RFI devices on the key ring or in the car (toll passes, other car keys, phone chargers, LED lights) interfering with the Passkey system and causing intermittent no-start conditions.
• PIT5030E: Although not for the Lucerne specifically, this TSB for other Buicks of the era highlights that flip-style keys not fully extended can cause a B3055 code.
• PIE0232: An engineering information bulletin requesting data from dealers on vehicles with B3055 to help determine the root cause, indicating it was a known issue being investigated.

Platform-Specific Known Issues

• A Technical Service Bulletin (TSB #PIC5650M) was issued for these vehicles for an intermittent no crank, no start, or stall concern with the security light on, specifically mentioning DTC B3055.
• Later versions of the same TSB (PIC5650C, PIC5650K) expand the list of potential Radio Frequency Interference (RFI) sources to include aftermarket LED lights, USB phone chargers, and even decorative 'Bedazzle' trim rings around the ignition lock.

Scan Tool Commands That Help

• Tech2 / GDS2 or equivalent professional scan tool: Immobilizer Data List — Use this to view live data parameters from the BCM, such as 'Key Detected' or 'BCM Key Part Number'. If the BCM does not show a key is detected or shows an invalid part number when a key is in the ignition, it points directly to a key or reader coil issue.
• Tech2 / GDS2 or equivalent professional scan tool: Add/Replace Keys or Programming Theft Deterrent System Components — This function is required after replacing a key, the ignition lock cylinder (with reader coil), or the BCM. It guides the technician through the 10-minute or 30-minute relearn procedure to program the new components to the vehicle.
• Key Tool (e.g., Xhorse VVDI Key Tool): Coil Detection / Transponder Read — A specialized key programming tool can be used to independently verify if the ignition's exciter coil is producing a signal and if the key's transponder chip is responding. This can quickly differentiate between a bad key and a bad reader coil.

Wiring & Ground Locations

• Body Control Module (BCM) — Located above the passenger kick panel, to the right of the glove box.. The BCM is the control center for the Pass-Key III system. It receives the signal from the key via the reader coil and decides whether to allow the engine to start. All related wiring terminates here.
• BCM Ground Path — Multiple ground points exist. Key locations include G303/G304 under the rear/passenger seats and potentially G103 on the cowl above the brake booster. TSB 07-08-47-004D warns that disconnecting a BCM ground without first disconnecting the negative battery terminal can damage the module.. A poor ground connection to the BCM can cause erratic behavior, including failure to correctly read the ignition key, leading to a B3055 code and a no-start condition.
• BCM Connectors X1, X2, X3 — These are the main multi-pin connectors plugging into the BCM.. The two small wires from the ignition lock cylinder's reader coil connect to the BCM through one of these connectors. A technician can use pinout diagrams to test for continuity and signal between the reader coil and the BCM without having to remove the entire steering column or dashboard.
• Ignition Lock Cylinder Wiring — Typically two small-gauge wires (often white) running from the ignition lock cylinder down the steering column to a connector at the base.. These specific wires carry the signal from the reader coil to the BCM. They are a common point of failure due to the repeated rotation of the steering wheel and tilt column adjustments, which can cause the wires to break internally over time.

Real Owner Repair Stories

• YouTube user dyna1955 (2007 Buick Lucerne) — Car would crank but not start, instrument chimes became very quiet, and the scanner was full of codes.
  ❌ Tried (didn't work) Charging the battery, initial visual checks.
  ✅ What actually fixed it The owner discovered a rodent's nest in the engine bay. A squirrel had chewed through a significant portion of the main wiring harness, causing widespread electrical faults, including the no-start condition. The fix was to repair the extensive wiring damage.
• YouTube channel Hands On Auto Training (2015 Chevy Malibu (similar GM Pass-Key system)) — No crank, no start, with DTC B3055 (No Transponder Modulation) present and current.
  ❌ Tried (didn't work) Clearing codes (code immediately returned).
  ✅ What actually fixed it Using a scan tool, the technician confirmed the BCM data stream showed 'no key detected'. A specialized key tool confirmed the ignition coil was putting out a signal, proving the reader was likely good. This isolated the fault to the key itself. A new key was programmed to the vehicle using a 10-minute security learn procedure, which resolved the no-start condition.
• Chevy HHR Network forum (Chevy HHR (similar GM Pass-Key III system)) — After an attempted theft and wiring damage, the vehicle would not start and the 30-minute relearn procedure would not complete (security light stayed on).
  ❌ Tried (didn't work) Performing the standard 30-minute relearn procedure multiple times.
  ✅ What actually fixed it The discussion pointed to the high probability that the butt-splice connectors used to repair the Pass-Key wiring had introduced too much resistance into the circuit. The system is sensitive to specific resistance/signal values, and improper repairs can prevent it from functioning, even if continuity is present. The recommendation was to solder and heat-shrink the connections for a clean, low-resistance repair.

"I Checked Everything" — The Actual Cause

• In one documented case on a 2007 Lucerne, a no-start condition with multiple codes was not caused by a faulty key, reader coil, or BCM. The actual root cause was a rodent that had chewed through the main engine wiring harness. A standard diagnostic path focusing only on the security system would have missed this, highlighting the importance of a thorough visual inspection of all wiring harnesses for physical damage in the event of widespread electrical issues.

OEM Part Supersession History

• 12458191, 15822350, 19168637 → GM 25832354 — Part consolidation and revision.
  Heads up: GM 25832354 is the current service replacement for the Ignition Lock Housing with Passkey Sensor for the 2007-2011 Lucerne. When ordering, ensure this is the part number received, as older stock may still exist.