← View Generic P0855 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

P0855: P0855: Transmission Control Module (TCM) Range/Performance Issue

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 P0855 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The Transmission Control Module (TCM) has detected an issue with the transmission's range and performance, possibly due to a faulty sensor or wiring problem.
⚠️

Symptoms

  • • Transmission slips
  • • hesitates
  • • or refuses to engage gears
  • • unusual noises
  • • or the 'check engine' light comes on.
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Common Causes

  • • Faulty transmission range sensor
  • • wiring issues
  • • TCM software glitch
  • • or transmission fluid leak.
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How to Fix P0855 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Clear the code and monitor the vehicle's behavior. If the issue persists, replace the transmission range sensor. 2. Inspect and repair any wiring damage. 3. Update the TCM software if necessary. 4. Check and top off transmission fluid levels.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Transmission range sensor Shop ↗ Wiring harness Shop ↗

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Related Diagnostic Codes

Other codes that may appear with P0855

P0853 Sequential Code

P0853: Transmission Control Module (TCM) Range/Performance Issue

Medium
P0854 Sequential Code

P0854: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0856 Sequential Code

P0856: Transmission Control Module (TCM) Range/Performance Issue

Medium
P0857 Sequential Code

P0857: 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