P0988: P0988: Transmission Advanced System - Transmission Control Module (TCM) Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost

$200 - $800

Parts & Labor

Difficulty

3/5

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 P0988 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The Transmission Control Module (TCM) has detected a malfunction in the transmission's advanced system, which may cause transmission shifting issues, hesitation, or slipping.

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Symptoms

• Transmission hesitation
• slipping
• or difficulty shifting gears
• unusual noises
• or the transmission warning light on the dashboard.

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Common Causes

• Faulty transmission solenoid
• faulty transmission pressure sensor
• faulty transmission temperature sensor
• or a software issue in the TCM.

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How to Fix P0988 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Clear the code and monitor the vehicle to see if the issue reoccurs. 2. Check and replace the faulty transmission solenoid, pressure sensor, or temperature sensor. 3. Update the TCM software if necessary. 4. Check for any loose connections or wiring issues.

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