← View Generic C1738 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

C1738: C1738: Rear Suspension Control Module (RSCM) Fault

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 C1738 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The C1738 code indicates a fault in the Rear Suspension Control Module (RSCM), which regulates the rear suspension's height and damping.
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Symptoms

  • • Sagging rear suspension
  • • uneven tire wear
  • • reduced ride height
  • • and possible loss of stability.
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Common Causes

  • • Faulty RSCM
  • • wiring issues
  • • or a problem with the rear suspension sensors.
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How to Fix C1738 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Disconnect the battery to clear the code. 2. Inspect and clean the RSCM connectors. 3. Check and replace faulty sensors. 4. Update the RSCM software if necessary. 5. Replace the RSCM if all else fails.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

RSCM Shop ↗ sensors Shop ↗ connectors Shop ↗

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Related Diagnostic Codes

Other codes that may appear with C1738

C1736 Sequential Code

C1736: ABS System Malfunction

Medium
C1737 Sequential Code

C1737: Brake System Pressure Sensor Circuit Malfunction

Medium
C1739 Sequential Code

C1739: Steering Column Position Sensor Circuit Malfunction

Medium
C1740 Sequential Code

C1740: Electronic Stability Control (ESC) Malfunction

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