Have a failed, damaged, water-damaged, corrupted, or non-communicating GM E78 Engine Control Module (ECM)?

Lacorte Automotive offers a professional mail-in GM E78 ECM cloning and programming service. You send us your original E78 ECM and a compatible replacement E78 ECM. We transfer the applicable vehicle-specific data and configuration from your original module to the replacement, professionally bench test and verify the completed ECM, and return both modules to you.

YOU SEND BOTH E78 ECMs — WE PROGRAM THE REPLACEMENT

This listing does NOT include a replacement ECM.

YOU SEND:

• Original GM E78 ECM
• Compatible replacement GM E78 ECM
• Vehicle VIN
• Year / Make / Model
• Engine information
• Required proof of ownership

SUPPORTED GM APPLICATIONS

The GM E78 ECM was used across various GM vehicles and powertrain configurations. Supported applications may include select:

• Chevrolet
• GMC
• Buick
• Cadillac
• Other supported GM applications equipped with an E78 ECM

Exact compatibility depends on the GM service number, hardware number, software/calibration, engine, transmission/application, model year, production date, and vehicle configuration.

Always verify the identification numbers printed on your original E78 before ordering.

Not sure? Send us clear photos of the labels on your original and replacement E78 ECMs along with your VIN.

COMMON E78 ECM FAILURE SYMPTOMS

A failing or damaged E78 may potentially cause:

• Crank but no start
• Intermittent no-start
• Engine stalling
• Rough running / misfires
• Reduced engine power
• Limp mode
• No communication with ECM
• Intermittent communication
• Injector-related faults
• Ignition-related faults
• Electronic throttle faults
• Sensor circuit faults
• Multiple unrelated DTCs
• Internal ECM faults
• Corrupted software or calibration data
• Water or moisture damage
• Internal electronic failure
• Completely non-responsive ECM

Proper diagnosis is strongly recommended. Wiring, grounds, power supplies, sensors, injectors, ignition components, throttle components, fuel-system issues, and other vehicle systems can cause similar symptoms.

WHAT'S INCLUDED

Depending on the exact application and condition of your original E78, service may include:

• Original E78 data extraction
• Replacement E78 programming
• VIN configuration
• Vehicle-specific configuration transfer
• Software/calibration transfer where applicable
• Applicable coding/data transfer
• Data-integrity verification
• Professional bench testing & verification
• Plug & Play preparation where supported

HOW IT WORKS

1. YOU SEND

Ship us your original E78 + compatible replacement E78.

2. WE READ

We extract the applicable vehicle-specific information from your original ECM.

3. WE PROGRAM

Applicable original data and configuration are transferred/prepared for your replacement E78.

4. BENCH TESTED & VERIFIED

The replacement E78 is professionally bench checked and verified before return.

5. WE SHIP IT BACK

Both ECMs are securely packaged and returned to you.

6. YOU RECEIVE

Your original E78 + programmed replacement E78.

PLUG & PLAY WHERE SUPPORTED

Our goal is to return the replacement E78 prepared for installation in the original vehicle with the applicable configuration already transferred.

Certain applications may still require vehicle-side setup or relearn procedures. Exact Plug & Play capability depends on the specific vehicle and ECM configuration.

TYPICAL 1–2 BUSINESS DAY TURNAROUND

Typical turnaround is 1–2 business days after receiving your complete package, subject to module condition and compatibility.

Same-day rush service may be available.

SIMPLE BREAKDOWN

YOU SEND:

Original GM E78 ECM + Compatible Replacement E78 ECM

WE PERFORM:

Professional E78 ECM Cloning & Programming

YOU RECEIVE:

Original ECM + Programmed & Bench-Verified Replacement ECM

PROOF OF OWNERSHIP REQUIRED

Please provide:

• Government-issued photo ID
• Vehicle title or current registration
• Vehicle VIN

Documentation must correspond with the vehicle being serviced.

IMPORTANT — REPLACEMENT COMPATIBILITY

An E78 ECM that looks identical is not necessarily compatible.

Compatibility may depend on:

• GM service number
• GM part number
• Hardware number
• Software/calibration
• Engine
• Transmission/application
• Vehicle platform
• Model year
• Production date
• Vehicle configuration

NOT SURE IF YOUR REPLACEMENT E78 WILL WORK?

Send us:

• Photo of your original E78 ECM label
• Photo of your replacement E78 ECM label
• VIN
• Year
• Make
• Model
• Engine

We'll help verify compatibility before you ship.

---

LACORTE AUTOMOTIVE

GM E78 ECM CLONING & PROGRAMMING SERVICE

YOU SEND: ORIGINAL E78 + REPLACEMENT E78

WE PERFORM: PROFESSIONAL ECM DATA TRANSFER & PROGRAMMING

PLUG & PLAY WHERE SUPPORTED • BENCH TESTED • TYPICAL 1–2 BUSINESS DAY TURNAROUND