← View Generic P0808 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

P0808: P0808: Transmission Control Module (TCM) Range/Performance Issue

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$200 - $1000
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
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 P0808 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The TCM has detected an issue with the transmission's range and performance, possibly due to a faulty sensor, faulty transmission solenoid, or a problem with the transmission's internal components.
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Symptoms

  • • Transmission slipping
  • • hesitation
  • • or hesitation when shifting gears
  • • unusual noises
  • • or the transmission light illuminated on the dashboard.
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Common Causes

  • • Faulty transmission solenoid
  • • faulty transmission sensor
  • • faulty transmission control module
  • • low transmission fluid level
  • • clogged transmission filter
  • • or internal transmission damage.
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How to Fix P0808 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check transmission fluid level and condition. 2. Scan for any other trouble codes. 3. Check transmission solenoid and sensor for any signs of damage or corrosion. 4. Replace faulty transmission solenoid or sensor. 5. Update transmission control module software if necessary. 6. Perform a transmission fluid flush and filter replacement.

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Need Maintenance Info for Your SILVERADO 1500 PICKUP?

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Transmission solenoid Shop ↗ Transmission sensor Shop ↗ Transmission control module Shop ↗ Transmission fluid Shop ↗ Transmission filter Shop ↗

Essential Tool

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Related Diagnostic Codes

Other codes that may appear with P0808

P0806 Sequential Code

P0806: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0807 Sequential Code

P0807: Transmission Control Module (TCM) Range/Performance Issue

Medium
P0809 Sequential Code

P0809: Transmission Control Module (TCM) Range/Performance Issue

Medium
P0810 Sequential Code

P0810: Transmission Control Module (TCM) Range/Performance Problem

Medium

💡 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