B3033 on GMC
Security System Indicates Tamper
B3033 on GMC vehicles indicates security system indicates tamper. Au7o has documented this code across 1 GMC model — most commonly on Yukon XL. B3033 is a vehicle access/anti-theft body code generally defined as the security system indicating a tamper condition. The body or theft-deterrent control module sets this code when it detects an attempted forced entry or an invalid/unauthorized access event, such as a door or ignition input that does not match a valid key/fob authorization. It is informational regarding the security system and usually does not affect drivability, though it may indicate a real tamper attempt or a faulty input. Typical repair costs on GMC range from $300 to $800, depending on the specific model and root cause.
Common Causes of B3033
- •Forced or unauthorized entry attempt detected
- •Faulty door ajar / lock cylinder tamper switch
- •Damaged wiring or connector in a security input
- •Key/immobilizer authentication mismatch
- •Body/theft-deterrent control module fault
- •Aftermarket alarm or remote-start interference
B3033 on GMC by Model
GMC Yukon XL(1 issue)
- Steering Column Lock Actuator Click and Binding2015-2020
The electronic steering column lock (ESCL) actuator in 2015-2020 Yukon XL models develops a clicking, popping, or grinding noise when turning the steering wheel, particularly at startup. In some cases, the ESCL prevents the vehicle from starting entirely, displaying a "Steering Column Lock" message. GM issued TSB 16-NA-012 acknowledging the issue. The ESCL motor gear teeth strip or the position sensor misreads, causing the lock to partially engage or fail to release.
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View B3033 across all makes →Frequently Asked Questions
What does B3033 mean on GMC?▼
B3033 stands for "Security System Indicates Tamper." B3033 is a vehicle access/anti-theft body code generally defined as the security system indicating a tamper condition. The body or theft-deterrent control module sets this code when it detects an attempted forced entry or an invalid/unauthorized access event, such as a door or ignition input that does not match a valid key/fob authorization. It is informational regarding the security system and usually does not affect drivability, though it may indicate a real tamper attempt or a faulty input. On GMC specifically, this code is documented across 1 model.
What causes B3033 on GMC vehicles?▼
Common causes on GMC: Forced or unauthorized entry attempt detected, Faulty door ajar / lock cylinder tamper switch, Damaged wiring or connector in a security input, Key/immobilizer authentication mismatch, Body/theft-deterrent control module fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B3033 on a GMC?▼
Repair costs on GMC range from $300 to $800, depending on the specific model and root cause.
Which GMC models have B3033 documented?▼
Au7o has documented B3033 on 1 GMC model: Yukon XL.