AutoCodes – Chevrolet – B1527 2017 Chevrolet Silverado

B1527 2017 Chevrolet Silverado Code - Parasitic Load

Quick Answer

The components most likely to cause a parasitic draw on the battery of the vehicle are switches, relays, and control modules. Common causes include Faulty Battery, Low Battery Charge, Charging System. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1527 2017 Chevrolet Silverado indicates Parasitic Load.
Common causes: Common causes include Faulty Battery, Low Battery Charge, Charging System.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 205

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Apr 21, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1527 2017 Chevrolet Silverado Description

The components most likely to cause a parasitic draw on the battery of the vehicle are switches, relays, and control modules. After the ignition is turned OFF the control modules will begin to go to sleep (shut OFF). All control modules do not go to sleep at the same time, some, like the Heating, Ventilation, and Air-Conditioning (HVAC) and body control modules, may take up to 30 min or longer after turning the ignition off before going to sleep. Others such as the ON Star and keyless entry control modules may periodically wake up then go back to sleep. These are all normal conditions. The Body Control Module (BCM) monitors the state of charge of the electrical system. If the BCM senses that the state of charge at ignition On is 30% lower than what it was when the engine was running.

OBDII Code B1527 2017 Chevrolet Silverado - Parasitic Load - AutoCodes.com — B1527 2017 Chevrolet Silverado Code - Parasitic Load

What does this mean?

What are the Possible Causes of the DTC B1527 2017 Chevrolet Silverado?

Faulty Battery
Low Battery Charge
Charging System

How to Fix the DTC B1527 2017 Chevrolet Silverado?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1527 2017 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1527 2017 Chevrolet Silverado code?

Need more information on how to fix the B1527 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1527 2017 Chevrolet Silverado Code

1. What does the OBDII code B1527 mean on a 2017 Chevrolet Silverado?

The code B1527 indicates a "Parasitic Load" issue, meaning excessive electrical current is being drawn from the battery when the vehicle is off.

2. What are the common symptoms of code B1527 in a 2017 Chevrolet Silverado?

Symptoms include a dead or weak battery, difficulty starting the vehicle, and intermittent electrical issues.

3. What causes the B1527 code to trigger on a 2017 Chevrolet Silverado?

Common causes include a faulty control module, malfunctioning electrical components, or accessories that continue to draw power when the vehicle is off.

4. How can I diagnose the B1527 code on my 2017 Chevrolet Silverado?

Start by testing the battery and alternator. Then, use a multimeter to check for excessive current draw (parasitic drain) when the vehicle is off, and isolate the circuit causing the issue.

5. Can a weak battery cause the B1527 code?

Yes, a weak or failing battery can contribute to the problem by not holding a charge, although the root issue is typically excessive current draw.

6. How do I fix the B1527 code on a 2017 Chevrolet Silverado?

Repairs may include replacing a faulty module, fixing damaged wiring, or disconnecting aftermarket accessories causing the drain.

7. Are aftermarket accessories a common cause for the B1527 code?

Yes, improperly installed aftermarket accessories like alarms, stereo systems, or remote starters can cause excessive parasitic loads.

8. Can I drive my 2017 Chevrolet Silverado with the B1527 code active?

While the vehicle may still drive, ignoring the issue can lead to repeated battery failure and potential damage to the electrical system.

9. How much current draw is considered excessive for a 2017 Chevrolet Silverado?

Typically, a parasitic load above 50 milliamps (0.05 amps) when the vehicle is off is considered excessive.

10. Will clearing the B1527 code solve the issue?

No, clearing the code without addressing the root cause will only temporarily turn off the warning. The problem must be diagnosed and repaired to prevent the code from returning.