B3060 on 2022-2026 GMC Savana: Security Light, No-Start Causes and Fixes

What's Unique About the 2022-2026 Gmc SAVANA

The GMC Savana, and its platform-mate the Chevrolet Express, use a Passkey III+ immobilizer system that is sensitive to wear and electrical interference. The core issue, as highlighted by multiple revisions of GM's technical service bulletin PIC5650, is often an intermittent communication failure between the key and the vehicle's security module. This can be caused by anything from worn wiring in the steering column to, most commonly, Radio Frequency Interference (RFI) from aftermarket electronic devices on the owner's keychain or plugged into the vehicle's power outlets.

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 and then immediately stalls.
• Security light is illuminated or flashing on the dashboard.
• "Service Theft Deterrent System" message on the driver information center.

Most Likely Causes

1. Using an Unprogrammed or Incorrect Key 🔴 High Probability This occurs if a new key has been cut but not electronically programmed to the vehicle, if a key from another vehicle is used, or if the key's internal transponder chip is damaged.
   How to confirm: Try starting the vehicle with all available keys. If another key works, the problematic key is the issue. A locksmith or dealer can test the key's transponder. A scan tool can also be used to monitor the 'Valid Key' or 'BCM Key Part Number' parameter in the BCM/TDM data.
   Typical fix: The unprogrammed key must be programmed to the vehicle using a specific key relearn procedure or a diagnostic scan tool. If the key is damaged, it will need to be replaced.
   Est. part cost: $25-$150
2. Faulty Ignition Lock Cylinder or Transponder Reader 🟡 Medium Probability The wires leading from the transponder reader (exciter coil) around the lock cylinder can break or fray from the repeated motion of turning the key and tilting the steering column, causing an intermittent connection. The sensor itself can also fail.
   How to confirm: Inspect the wiring harness coming from the ignition lock cylinder for visible damage, particularly where it passes through the steering column. A scan tool can monitor the key signal data from the Theft Deterrent Module; an unstable or absent signal points to this component. A common failure point is the small wires breaking inside their insulation, which requires testing for continuity.
   Typical fix: Replacement of the ignition lock cylinder and housing, which typically includes the transponder reader coil. A key relearn procedure is required after replacement.
   Est. part cost: $100-$300
3. Radio Frequency Interference (RFI) 🟡 Medium Probability As noted in GM TSBs PIC5650M and PIC5650K, aftermarket devices can interfere with the 125kHz signal between the key and the vehicle. Common culprits include other keys with transponders on the same ring, aftermarket LED lights (especially dome lights), USB phone chargers, and building access cards.
   How to confirm: Remove all other keys, fobs, toll passes, and aftermarket electronics (like phone chargers or LED lights) from the keychain and the vehicle's interior. If the vehicle starts consistently with just the single, isolated vehicle key, RFI is the cause.
   Typical fix: Permanently separate the interfering device from the vehicle's key. Advise the customer to keep the ignition key on its own ring.
   Est. part cost: $0
4. Failing Body Control Module (BCM) ⚪ Low Probability While less common, the BCM is the module that stores the key data and makes the security decision. An internal failure due to heat, moisture, or age can cause it to lose memory, fail to communicate, or not respond to relearn procedures.
   How to confirm: This is a diagnosis of exclusion. If the key, wiring, and lock cylinder are all confirmed to be good, and the BCM fails to communicate with a scan tool or respond to relearn procedures, it is likely faulty. Other seemingly unrelated electrical issues (lights, locks, wipers acting erratically) are also a strong indicator of BCM failure.
   Typical fix: Replacement of the BCM. This requires programming by a dealer or a qualified shop with the correct tools to match the vehicle's VIN and options.
   Est. part cost: $300-$700

Rare But Worth Checking

• Low Battery Voltage: A weak or failing battery can cause communication errors between various modules, including the theft deterrent system, leading to a no-start and setting this code. Always check battery health (voltage and load test) before diving into more complex diagnostics. A battery charger is recommended during the 30-minute relearn procedure to ensure stable voltage.

Diagnosis Steps

1. Verify the complaint: Confirm the no-start/start-stall condition and check that the security light is on or flashing.
2. Scan for Codes: Use an OBD-II scanner capable of reading BCM codes to confirm B3060 and any other related DTCs like B3055 or B3935.
3. Inspect the Key and Environment: Try a spare key if available. Remove ALL other keys, fobs, and electronic devices from the keychain and vehicle interior to eliminate Radio Frequency Interference (RFI) as detailed in TSB PIC5650M.
4. Check Battery and Connections: Ensure the vehicle battery has at least 12.4 volts and that the terminals are clean and tight. Connect a battery charger if you plan to attempt the relearn procedure.
5. Attempt Security Relearn Procedure: Perform the 30-minute relearn procedure. 1) Turn the key to 'ON' (do not start). 2) Wait for the security light to turn off (this will take approximately 10-11 minutes). 3) Turn the key 'OFF' for 30 seconds. 4) Repeat steps 1-3 two more times for a total of three cycles. 5) After the third cycle, turn the key off, then attempt to start the engine. The vehicle should have learned the key.
6. Inspect Ignition Cylinder Wiring: Remove the steering column shrouds and visually inspect the wires coming from the ignition lock cylinder for any signs of chafing, pinching, or breaks. Pay close attention to the area where the harness flexes with the tilt column.
7. Test Components: If the relearn fails and wiring is intact, a professional will need to use a scan tool to monitor the 'TDM Valid Key' or 'BCM Key Part Number' live data PID to see if the module is recognizing the key at all. This will isolate the fault to the key, the reader coil/cylinder, or the BCM itself.

Parts You'll Likely Need

• Ignition Lock Cylinder with Passlock Sensor/Transponder Reader (OEM #20766607, 15841209) — This is the most common mechanical and electrical failure point. The wiring breaks from use or the sensor itself fails, preventing the key from being read correctly.
  Trusted brands: ACDelco, Standard Motor Products, Dorman
  OEM price range: $150-$250
  Aftermarket price range: $80-$180
• Transponder Ignition Key (OEM #13520340, 23300334, 13531099) — The transponder chip embedded in the key head (ID46 GM Circle +) can be damaged or lose its programming, causing the vehicle to reject it.
  Trusted brands: ACDelco, Strattec
  OEM price range: $50-$100
  Aftermarket price range: $25-$60

Related Codes That Often Appear With This One

• B3055 — Stands for "No Transponder Modulation or No Transponder." This code is often set alongside B3060, indicating the security module received no signal from the key at all, which could be due to a bad key, a faulty reader coil, or severe RFI.
• B3935 — Stands for "Transponder Authentication Error." This indicates a more general failure in the security handshake process and frequently appears with B3055 and B3060 as part of the same fault event.

Technical Service Bulletins (TSBs) & Recalls

• PIC5650M: Addresses an intermittent no crank, no start, or start stall concern with the security light coming on, potentially setting DTCs B3055, B3060, and B3935. It strongly

Platform-Specific Known Issues

• Per NHTSA bulletin #PIC5650M, the 2022 GMC Savana may experience an intermittent no crank, no start, or start-and-stall with the security light on, which can set code B3060 along with others like B3055 and B3935. This highlights a known intermittent security system issue on this platform.
• The bulletin strongly advises checking for Radio Frequency Interference (RFI) from aftermarket devices like phone chargers, LED lights, and even other keys on the same keychain before replacing any parts.

Mechanic-Grade Diagnostic Values

• Scan Tool Live Data: BCM 'Valid Key' Parameter — expected: 'Yes'. Failure: The parameter reads 'No' or is blank when a supposedly valid key is in the ignition and turned to ON.
• Scan Tool Live Data: BCM 'Key Part Number' Parameter — expected: A key part number is displayed on the scan tool.. Failure: The parameter does not display a key part number when the key is in the ignition.
• Ignition Switch 'IGN' or 'IGN1' Terminal Voltage — expected: Approximately 12V with key in RUN and START positions.. Failure: Voltage drops significantly or is absent in the RUN or START position, indicating a faulty ignition switch.
• Vehicle Battery Voltage (Engine Off) — expected: 12.4V or higher.. Failure: Voltage below 12.4V indicates a discharged battery that can cause module communication errors and prevent proper diagnosis or relearn procedures.

Scan Tool Commands That Help

• GM GDS2 (Global Diagnostic System 2): Module Diagnostics -> BCM -> Data Display -> 'Valid Key' or 'Key Part Number' — This is a primary step to determine if the Body Control Module is receiving and recognizing a signal from the key's transponder. It helps differentiate a key/reader problem from a BCM problem.
• GM GDS2 with SPS (Service Programming System): Vehicle Theft Deterrent Relearn — After replacing the BCM, ignition lock cylinder, or keys, this function is required to program the new components to the vehicle. It is more robust than the manual 30-minute relearn.
• GM GDS2 with SPS: Setup SDM Primary Key in BCM — This function is required after replacing and programming a new BCM to ensure the new module is correctly paired with the vehicle's airbag/Sensing and Diagnostic Module (SDM) to prevent airbag system faults.

Wiring & Ground Locations

• G218 — Driver's side under-dash area, on the A-pillar or front of dash structure.. This is a primary ground for the Body Control Module (BCM) on many GM trucks. A poor connection here, sometimes caused by a trapped dash insulator mat, can cause a no-start, set various DTCs including security codes, and create intermittent electrical issues that mimic BCM failure.
• G103 — Located at the left rear of the engine compartment on the cowl, often above the brake booster.. On some GM platforms, this ground serves the BCM, Instrument Panel Cluster (IPC), and Data Link Connector (DLC). A fault here can disrupt communication between the modules essential for the immobilizer handshake.
• Ignition Switch Connector — At the back of the ignition lock cylinder housing inside the steering column.. The wires for the transponder reader coil pass through this connector and are prone to breaking from the stress of a tilting steering column. Key wires include Pink (Ignition Power), Red/White (Battery Power), and the small data wires for the transponder coil.

"I Checked Everything" — The Actual Cause

• A common parallel for this electrical code is when standard continuity tests on grounds appear normal. The actual cause, as identified in GM TSB PIT5405C, can be the dash insulator mat getting pinched between the G218 ground eyelet and the vehicle body. This creates a high-resistance connection that may pass a simple continuity check but fails under electrical load, causing the BCM to malfunction and trigger security codes. The fix is to physically cut away the interfering matting to ensure a clean metal-to-metal contact for the ground.

OEM Part Supersession History

• 13520340 → 13531098 — Standard part number update or revision.
  Heads up: These parts are generally cross-compatible.
• 20766607 (Ignition Lock Cylinder) → N/A — N/A
  Heads up: While this part number is associated with the correct lock cylinder, some kits sold under this number are noted as being for '2011-2013 Only' and may include extra door/trunk cylinders not needed for a newer Savana. Care must be taken to order the correct component for the specific vehicle year.

Model Year Variations Within This Range

• 2017+: When adding a new key, user-accessible programming (the 30-minute relearn) may require two existing, working keys to initiate. If the owner has lost all keys or only has one, a dealer or locksmith with scan tool access (like GDS2) is required for programming.