← View Generic P0838 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

P0838: P0838: Transmission Control Module (TCM) Range/Performance Problem

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
⚠️

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 P0838 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The Transmission Control Module (TCM) has detected a problem with the transmission's range and performance, which can cause issues with gear shifting, transmission slipping, or hesitation.
⚠️

Symptoms

  • • Transmission slipping
  • • hesitation
  • • or delay when shifting gears
  • • unusual noises
  • • or vibrations while driving
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Common Causes

  • • Faulty transmission solenoid
  • • clogged transmission filter
  • • low transmission fluid level
  • • faulty transmission control module
  • • or wiring issues
🛠️

How to Fix P0838 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check transmission fluid level and condition, 2. Inspect and clean or replace the transmission filter, 3. Test and replace faulty transmission solenoids, 4. Update or replace the transmission control module, 5. Check and repair wiring issues

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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 filter Shop ↗ Transmission fluid Shop ↗

Essential Tool

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Related Diagnostic Codes

Other codes that may appear with P0838

P0836 Sequential Code

P0836: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0837 Sequential Code

P0837: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0839 Sequential Code

P0839: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0840 Sequential Code

P0840: 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