← View Generic P0599 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

P0599: P0599: Idle Air Control (IAC) Motor Circuit Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$100 - $300
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 P0599 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The idle air control (IAC) motor circuit has malfunctioned, causing the engine to idle rough or stall. This code is often accompanied by other symptoms such as a rough idle, stalling, or a check engine light.
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Symptoms

  • • Rough idle
  • • stalling
  • • check engine light
  • • decreased fuel efficiency
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Common Causes

  • • Faulty idle air control (IAC) motor
  • • dirty or clogged IAC motor
  • • vacuum leaks
  • • faulty throttle position sensor
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How to Fix P0599 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Clean or replace the IAC motor, 2. Check and repair vacuum leaks, 3. Replace the throttle position sensor if faulty, 4. Check and adjust the idle air mixture

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Idle Air Control (IAC) motor Shop ↗ Vacuum hoses Shop ↗ Throttle position sensor Shop ↗

Essential Tool

Must Have

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Related Diagnostic Codes

Other codes that may appear with P0599

P0597 Sequential Code

P0597: Idle Air Control (IAC) Motor Circuit Malfunction

Medium
P0598 Sequential Code

P0598: Idle Air Control (IAC) Motor Circuit Malfunction

Medium
P0600 Sequential Code

Serial Communication Link Malfunction

High
P0601 Sequential Code

Internal Control Module Memory Check Sum Error

High

💡 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