This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP
B0174: B0174: Body Control Module (BCM) Security System Malfunction
on 2020 Chevrolet SILVERADO 1500 PICKUP
Important for 2020 Chevrolet SILVERADO 1500 PICKUP Owners
Before starting repairs, verify which engine your 2020 Chevrolet SILVERADO 1500 PICKUP has. Check your VIN or engine code to ensure you order the correct parts.
📖 What Does B0174 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?
Symptoms
- • Engine light on
- • security system alarm sounds
- • doors and trunk may be locked or unlocked randomly
- • some features may be disabled
Common Causes
- • Faulty BCM
- • damaged or corroded wiring
- • malfunctioning security sensors
- • incorrect BCM programming
How to Fix B0174 on 2020 Chevrolet SILVERADO 1500 PICKUP
1. Check for loose or corroded wiring and clean or replace as needed. 2. Check BCM programming and update if necessary. 3. Replace faulty security sensors. 4. Re-program the BCM if necessary.
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Essential Tool
OBD2 Scanner
Read & clear codes on your 2020 Chevrolet SILVERADO 1500 PICKUP
Shop Scanners ↗Related Diagnostic Codes
Other codes that may appear with B0174
B0172: Seat Switch Circuit Malfunction
B0173: Exterior Light Malfunction
B0175: Audio System Malfunction
B0176: Airbag System Malfunction
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system