← View Generic P0748 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

P0748: P0748: Transmission Control System Malfunction

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 P0748 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The transmission control system is malfunctioning, causing issues with gear shifting and transmission operation.
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Symptoms

  • • Sluggish shifting
  • • hesitation between gears
  • • transmission slipping
  • • or failure to engage gears.
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Common Causes

  • • Faulty transmission control module
  • • faulty transmission solenoid
  • • clogged transmission filter
  • • or low transmission fluid level.
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How to Fix P0748 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check transmission fluid level and top off as needed. 2. Scan for any other trouble codes. 3. Replace the transmission control module if faulty. 4. Clean or replace the transmission solenoid if faulty. 5. Replace the transmission filter if clogged.

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Need Maintenance Info for Your SILVERADO 1500 PICKUP?

Get oil capacity, filter specs, and torque settings for your specific 2020 Chevrolet SILVERADO 1500 PICKUP.

View 2020 Chevrolet SILVERADO 1500 PICKUP Specs

Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Transmission control module Shop ↗ Transmission solenoid Shop ↗ Transmission filter Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with P0748

P0746 Sequential Code

P0746: Transmission Control System Malfunction

Medium
P0747 Sequential Code

P0747: Transmission Control System Malfunction Affecting Gear Shifting

Medium
P0749 Sequential Code

P0749: Transmission Control System Malfunction

Medium
P0750 Sequential Code

Shift Solenoid A Malfunction

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