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OEM Engine Control Module (ECM) for 2018, 2019 Chevrolet & GMC
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OEM Engine Control Module (ECM) for 2018-2019 Chevrolet & GMC

$ 96 .95

⚠️ ELECTRONIC MODULE NOTICE

This module may require programming to your vehicle by a dealer or qualified technician with professional diagnostic equipment.

  • Ships in a sealed inspection bag for visual inspection
  • Returns not accepted if inspection bag has been opened
  • "Needs programming" is not grounds for return
  • If told the module "won't program," contact us before returning
  • Defective units replaced ONLY ONCE, under warranty

Product Notes

This is a used engine control module. This is a programmable control module that must be programmed at a dealership to ensure driveability and emission standards. This part fits vehicles with the 4.3L engine. It also fits vehicles with the following engine options: VIN 6 (8th digit, option LT4), VIN 7 (8th digit, option LT1), or VIN 8 (8th digit, option LF3).

This is a programmable Engine Control Module (ECM). After installation, it MUST be programmed by a qualified technician or dealership to ensure proper vehicle operation and compliance with emissions standards. This module fits a variety of engines depending on the vehicle model; please verify fitment for your specific application.
Condition: Excellent (A)
Like new, minimal to no wear
48,300 miles
Odometer reading when part was removed
See All Other Engine Control Module (ECM)s

Why Buy Used OEM Parts?

  • ✓ Quality-Verified: Every used OEM part we sell has been professionally inspected and tested. While it may show some cosmetic wear, it's fully functional and ready to install.
  • ✓ Original Equipment: This is a genuine OEM part — the exact part that came with your vehicle from the factory. Perfect fitment and performance.
  • ✓ Works Like New: Despite visual wear, internal components and functionality are intact. Same reliability you'd expect from OEM quality.
  • ✓ Significant Savings: Save 50–80% vs. new. Factory quality at a fraction of the cost — the smart choice for budget-conscious owners.
30-dayreturns 6-monthwarranty 100%money-back
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Vehicle Fitment Guide

This part fits the following vehicles:

Chevrolet 3 models(tapclick to expand)(tapclick to hide)
Express 2500 2018 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Extended Cargo Van 2018 V6 4.3L RWD | Automatic
Base Extended Cargo Van 2018 V6 4.3L FLEX RWD | Automatic
Base Standard Cargo Van 2018 V6 4.3L RWD | Automatic
Base Standard Cargo Van 2018 V6 4.3L FLEX RWD | Automatic
LS Standard Passenger Van 2018 V6 4.3L FLEX RWD | Automatic
LS Standard Passenger Van 2018 V6 4.3L RWD | Automatic
LT Standard Passenger Van 2018 V6 4.3L RWD | Automatic
LT Standard Passenger Van 2018 V6 4.3L FLEX RWD | Automatic
Express 3500 2018 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Cutaway Van 2018 V6 4.3L RWD | Automatic
Base Cutaway Van 2018 V6 4.3L FLEX RWD | Automatic
Base Extended Cargo Van 2018 V6 4.3L FLEX RWD | Automatic
Base Extended Cargo Van 2018 V6 4.3L RWD | Automatic
Base Standard Cargo Van 2018 V6 4.3L FLEX RWD | Automatic
Base Standard Cargo Van 2018 V6 4.3L RWD | Automatic
LS Extended Passenger Van 2018 V6 4.3L FLEX RWD | Automatic
LS Extended Passenger Van 2018 V6 4.3L RWD | Automatic
LS Standard Passenger Van 2018 V6 4.3L RWD | Automatic
LS Standard Passenger Van 2018 V6 4.3L FLEX RWD | Automatic
LT Extended Passenger Van 2018 V6 4.3L RWD | Automatic
LT Extended Passenger Van 2018 V6 4.3L FLEX RWD | Automatic
LT Standard Passenger Van 2018 V6 4.3L RWD | Automatic
LT Standard Passenger Van 2018 V6 4.3L FLEX RWD | Automatic
Silverado 1500 2018 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Custom Crew Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
Custom Extended Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
LS Crew Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
LS Extended Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
LS Standard Cab Pickup 2018 V6 4.3L RWD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
LS Standard Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
LT Crew Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
LT Extended Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
LT Standard Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
WT Crew Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
WT Extended Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
WT Standard Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
GMC 3 models(tapclick to expand)(tapclick to hide)
Savana 2500 2018 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Extended Cargo Van 2018 V6 4.3L RWD | Automatic
Base Extended Cargo Van 2018 V6 4.3L FLEX RWD | Automatic
Base Standard Cargo Van 2018 V6 4.3L RWD | Automatic
Base Standard Cargo Van 2018 V6 4.3L FLEX RWD | Automatic
LS Standard Passenger Van 2018 V6 4.3L FLEX RWD | Automatic
LS Standard Passenger Van 2018 V6 4.3L RWD | Automatic
LT Standard Passenger Van 2018 V6 4.3L RWD | Automatic
LT Standard Passenger Van 2018 V6 4.3L FLEX RWD | Automatic
Savana 3500 2018 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Cutaway Van 2018 V6 4.3L RWD | Automatic
Base Cutaway Van 2018 V6 4.3L FLEX RWD | Automatic
Base Extended Cargo Van 2018 V6 4.3L RWD | Automatic
Base Extended Cargo Van 2018 V6 4.3L FLEX RWD | Automatic
Base Extended Passenger Van 2018 V6 4.3L RWD | Automatic
Base Extended Passenger Van 2018 V6 4.3L FLEX RWD | Automatic
Base Standard Cargo Van 2018 V6 4.3L FLEX RWD | Automatic
Base Standard Cargo Van 2018 V6 4.3L RWD | Automatic
Base Standard Passenger Van 2018 V6 4.3L FLEX RWD | Automatic
Base Standard Passenger Van 2018 V6 4.3L RWD | Automatic
LS Extended Passenger Van 2018 V6 4.3L FLEX RWD | Automatic
LS Extended Passenger Van 2018 V6 4.3L RWD | Automatic
LS Standard Passenger Van 2018 V6 4.3L FLEX RWD | Automatic
LS Standard Passenger Van 2018 V6 4.3L RWD | Automatic
LT Extended Passenger Van 2018 V6 4.3L FLEX RWD | Automatic
LT Extended Passenger Van 2018 V6 4.3L RWD | Automatic
LT Standard Passenger Van 2018 V6 4.3L FLEX RWD | Automatic
LT Standard Passenger Van 2018 V6 4.3L RWD | Automatic
Sierra 1500 2018 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Crew Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
Base Extended Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
Base Standard Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
SLE Crew Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
SLE Extended Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
SLE Standard Cab Pickup 2018 V6 4.3L FLEX RWD/4WD | Automatic | For 2019 models, this fits the 'Classic' or 'Limited' body style (where mirrors mount in the window corner).
Verify before ordering — please confirm your vehicle's year, make, model and sub-model specifications before placing your order. If anything is unclear, our customer service team is available to help.

Policies

Shipping & Handling

  • Standard shipping: 3-7 business days via UPS Ground
  • Parts are carefully packaged to prevent damage during transit

Returns (30 Days)

We accept returns within 30 days of delivery for this part.

  • Defective parts: We will replace the part or issue a refund at our discretion
  • Electronic parts: Must be returned with the sealed inspection bag unopened. The clear bag allows full visual inspection before opening. Once opened, electronic parts can only be exchanged for a replacement if defective — no refunds
  • Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
  • Return shipping: We cover return shipping as part of our 100% money-back guarantee
  • Parts must be returned in original packaging and unmodified condition
  • Poorly packaged returns that arrive damaged will not be credited

6-Month Warranty

All used parts include a 6-month warranty from the date of purchase.

  • If your part fails within 6 months, we will send a replacement
  • Refunds are only issued if we cannot provide a suitable replacement
  • Warranty covers defects — not installation errors, misuse, or damage after installation

Note: Warranty is for replacement, not refund. A part failing on day 80? We'll replace it. But the return window for refunds is 30 days.

Damaged in Shipping?

If your part arrives damaged:

  • Stop immediately — do not install the part
  • Keep all original packaging and boxes
  • Take clear photos of the damage and packaging
  • Contact us within 48 hours of delivery

We will handle the carrier claim. You are not responsible for shipping damage — we just need your help documenting it.

Order Cancellation

Orders can be cancelled before shipment for a full refund. Once shipped, cancellations follow our return policy.

Go-Parts Garage · Featured Guide

2018-2019 GM ECM Failure: Programming, Symptoms, and Replacement for Silverado, Escalade, Corvette & More

This guide covers the common failure symptoms and mandatory programming requirements for the engine control module (ECM) in many 2018-2019 GM trucks, SUVs, and cars.

Read Full Guide →

⚠️ Related Trouble Codes (OBD-II)

42 matching guides

If your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.

P0308
Why Your V6 is Showing a V8 Misfire Code
2013-2019 Cadillac XTS
P0333
Knock Sensor Circuit Causes and Fixes
2014-2020 Gmc YUKON XL
P0333
Knock Sensor Circuit High Causes & Fixes
2015-2019 Gmc YUKON DENALI
P0601
Internal Module Failure Causes and Fixes
2015-2018 Gmc YUKON
P0601
Internal Control Module Failure Explained
2015-2018 Cadillac ESCALADE
P0601
Internal ECM Memory Error Causes and Fixes
2015-2018 Chevrolet TAHOE
P0601
ECM/TCM Failure Causes & Fixes
2015-2018 Chevrolet SILVERADO 1500
P0601
Internal ECM Failure Causes and Fixes
2015-2018 Chevrolet SUBURBAN
P0601
ECM Failure Causes and Fixes
2016-2018 Gmc SIERRA 1500
P0604
Internal RAM Error Causes and Fixes
2015-2018 Cadillac ESCALADE
P0604
Internal RAM Error Causes & Fixes
2015-2018 Chevrolet SUBURBAN
P0604
RAM Error Causes and Fixes
2015-2018 Chevrolet SILVERADO 1500
↑ A single part can trigger multiple related trouble codes. Each guide is vehicle- and code-specific.

Miscellaneous Information

OEM Part Numbers:
GM: 12680656, 12686027, 12686383, 12688528, 12692069, 12696364, 12704475
Other: 12674052, 12674472, 12678939, 12686382, 12691885, 12695212

Fits Years: 2018 2019

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Warranty

Backed For The Long Haul

This part ships with a 6-month warranty. If it doesn't fit or stops working, we replace or refund — no hassle.

What buyers are saying.

★★★★★ 4.9 1,451 verified reviews

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