← View Generic P0843 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

P0843: P0843: Transmission Control Module (TCM) Range/Performance Problem

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 P0843 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The TCM has detected a problem with the transmission's range and performance, which can cause issues with gear shifting, transmission slipping, or hesitation.
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Symptoms

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

  • • Faulty transmission solenoid
  • • clogged transmission filter
  • • low transmission fluid level
  • • faulty transmission pressure sensor
  • • or a problem with the transmission control module itself.
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How to Fix P0843 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check and top off transmission fluid level. 2. Clean or replace the transmission filter. 3. Inspect and replace the transmission solenoid if faulty. 4. Check and replace the transmission pressure sensor if faulty. 5. Update the transmission control module software if necessary.

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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 pressure sensor Shop ↗

Essential Tool

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Related Diagnostic Codes

Other codes that may appear with P0843

P0841 Sequential Code

P0841: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0842 Sequential Code

P0842: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0844 Sequential Code

P0844: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0845 Sequential Code

P0845: 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