P0889: P0889: Transmission Control Module (TCM) Internal Failure

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost

$500 - $1500

Parts & Labor

Difficulty

4/5

1-2 hours

DIY Possible?

❌ No

Pro recommended

Your Vehicle

2020 Chevrolet

SILVERADO 1500 PICKUP

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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 P0889 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The Transmission Control Module (TCM) has detected an internal failure, which may be caused by a faulty TCM, wiring issue, or other internal component failure.

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Symptoms

• Transmission slipping
• hesitation
• or failure to engage gears
• loss of power
• or check engine light illumination

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Common Causes

• Faulty TCM
• wiring issue
• internal component failure
• or software glitch

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How to Fix P0889 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Clear the code and monitor the vehicle to see if the issue reoccurs. 2. Check for any loose or damaged wiring and repair or replace as necessary. 3. Update the TCM software if necessary. 4. Replace the TCM if all else fails.

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