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This is a representative photo of the same part, not the exact unit you'll receive. Since each used part has its own wear and the color may differ, yours may look slightly different.

OEM Engine Control Module (ECM) for 2015, 2016 Buick, Cadillac, Chevrolet, & GMC - Rear

OEM Engine Control Module (ECM) for 2015-2016 Buick, Cadillac, Chevrolet, & GMC - Rear

$ 139 .95

30-DayReturns

6-monthWarranty

100%Money-Back

Condition: Excellent (A) — like new, minimal to no wear

Professionally inspected and tested.

Odometer 97,400 mi at removal

Product Notes Read before buying

This is a used Speedo Head/Cluster. It fits vehicles with option code 4EC, rear-wheel drive, the 4.3L engine, and an automatic transmission.

This is a programmable engine control module. To ensure proper vehicle operation and compliance with emission standards, this module must be programmed to your vehicle's specific VIN (Vehicle Identification Number) by a qualified technician or dealership upon installation.

2 Other Matching Units Available

Same part, different stock options.

Unknown (1) ✓ MATCHES CURRENT COLOR

Grade A 121,200 mi

$167.95 View →

Black (1)

Grade A 125,900 mi

$99.95 View →

See All Other Engine Control Module (ECM)s

Why Buy Used OEM Parts?

Checked & Tested

We check and test every used part before we sell it. It may show some wear, but it works and is ready to install.

Original Equipment

This is the same part your vehicle came with from the factory. It fits and works just like the original — because it is one.

Works Like New

A few marks on the outside don't change what's inside. The part works the way it should.

Big Savings

Pay 50–80% less than buying new. Same factory part, much lower price.

Wrenchy the Robot

Not sure? Ask Wrenchy — Your Parts Assistant.

Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.

Vehicle Fitment Guide

This part fits the following vehicles:

Buick 3 models(tapclick to expand)(tapclick to hide)

Cascada 2016 (tapclick to expand)(tapclick to hide)

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SubmodelSUB- MODEL	Body Style	Years	Engine	Attributes
Base	Convertible	2016	L4 1.6L Turbo	FWD \| Automatic
Premium	Convertible	2016	L4 1.6L Turbo	FWD \| Automatic

Encore 2016 (tapclick to expand)(tapclick to hide)

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SubmodelSUB- MODEL	Body Style	Years	Engine	Attributes
Base	SUV	2016	L4 1.4L Turbo	AWD/FWD \| Automatic
Convenience	SUV	2016	L4 1.4L Turbo	AWD/FWD \| Automatic
CX	SUV	2016	L4 1.4L Turbo	FWD \| Automatic
CXL	SUV	2016	L4 1.4L Turbo	FWD \| Automatic
Leather	SUV	2016	L4 1.4L Turbo	AWD/FWD \| Automatic
Premium	SUV	2016	L4 1.4L Turbo	AWD/FWD \| Automatic
Sport Touring	SUV	2016	L4 1.4L Turbo	AWD/FWD \| Automatic

Envision 2016 (tapclick to expand)(tapclick to hide)

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SubmodelSUB- MODEL	Body Style	Years	Engine	Attributes
CXL	SUV	2016	L4 2.0L Turbo	AWD \| Automatic
Premium	SUV	2016	L4 2.0L Turbo	AWD \| Automatic

Cadillac 2 models(tapclick to expand)(tapclick to hide)

ATS 2016 (tapclick to expand)(tapclick to hide)

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SubmodelSUB- MODEL	Body Style	Years	Engine	Attributes
Base	Coupe	2016	L4 2.0L Turbo	AWD/RWD \| Automatic & Manual
Base	Sedan	2016	L4 2.0L Turbo	AWD/RWD \| Automatic & Manual
Base	Coupe	2016	L4 2.5L	AWD/RWD \| Automatic & Manual
Base	Sedan	2016	L4 2.5L	AWD/RWD \| Automatic & Manual
Luxury	Coupe	2016	L4 2.0L Turbo	AWD/RWD \| Automatic & Manual
Luxury	Sedan	2016	L4 2.0L Turbo	AWD/RWD \| Automatic & Manual
Luxury	Coupe	2016	L4 2.5L	AWD/RWD \| Automatic & Manual
Luxury	Sedan	2016	L4 2.5L	AWD/RWD \| Automatic & Manual
Luxury	Coupe	2016	V6 3.6L	AWD/RWD \| Automatic & Manual
Luxury	Sedan	2016	V6 3.6L	AWD/RWD \| Automatic & Manual
Performance	Coupe	2016	L4 2.0L Turbo	AWD/RWD \| Automatic & Manual
Performance	Sedan	2016	L4 2.0L Turbo	AWD/RWD \| Automatic & Manual
Performance	Coupe	2016	V6 3.6L	AWD/RWD \| Automatic & Manual
Performance	Sedan	2016	V6 3.6L	AWD/RWD \| Automatic & Manual
Premium	Coupe	2016	L4 2.0L Turbo	AWD/RWD \| Automatic & Manual
Premium	Sedan	2016	L4 2.0L Turbo	AWD/RWD \| Automatic & Manual
Premium	Coupe	2016	V6 3.6L	AWD/RWD \| Automatic & Manual
Premium	Sedan	2016	V6 3.6L	AWD/RWD \| Automatic & Manual
V	Coupe	2016	V6 3.6L Turbo	RWD \| Automatic & Manual
V	Sedan	2016	V6 3.6L Turbo	RWD \| Automatic & Manual

CTS 2016 (tapclick to expand)(tapclick to hide)

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SubmodelSUB- MODEL	Body Style	Years	Engine	Attributes
Base	Sedan	2016	L4 2.0L Turbo	AWD/RWD \| Automatic
Luxury	Sedan	2016	L4 2.0L Turbo	AWD/RWD \| Automatic
Luxury	Sedan	2016	V6 3.6L	AWD/RWD \| Automatic
Performance	Sedan	2016	L4 2.0L Turbo	AWD/RWD \| Automatic
Performance	Sedan	2016	V6 3.6L	AWD/RWD \| Automatic
Premium	Sedan	2016	L4 2.0L Turbo	AWD/RWD \| Automatic
Premium	Sedan	2016	V6 3.6L	AWD/RWD \| Automatic
V	Sedan	2016	V8 6.2L Supercharged	RWD \| Automatic
Vsport	Sedan	2016	V6 3.6L Turbo	RWD \| Automatic
Vsport Premium	Sedan	2016	V6 3.6L Turbo	RWD \| Automatic

Chevrolet 3 models(tapclick to expand)(tapclick to hide)

Camaro 2016 (tapclick to expand)(tapclick to hide)

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SubmodelSUB- MODEL	Body Style	Years	Engine	Attributes
LT	Convertible	2016	L4 2.0L Turbo	RWD \| Automatic & Manual
LT	Coupe	2016	L4 2.0L Turbo	RWD \| Automatic & Manual
LT	Convertible	2016	V6 3.6L	RWD \| Automatic & Manual
LT	Coupe	2016	V6 3.6L	RWD \| Automatic & Manual
RS	Coupe	2016	V6 3.6L	RWD \| Automatic
SS	Coupe	2016	V6 3.6L	RWD \| Automatic
SS	Convertible	2016	V8 6.2L	RWD \| Automatic & Manual
SS	Coupe	2016	V8 6.2L	RWD \| Automatic & Manual

Colorado 2015-2016 (tapclick to expand)(tapclick to hide)

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SubmodelSUB- MODEL	Body Style	Years	Engine	Attributes
Base	Extended Cab Pickup	2015 - 2016	L4 2.5L	RWD \| Manual
LT	Crew Cab Pickup	2015 - 2016	L4 2.5L	RWD/4WD \| Automatic
LT	Extended Cab Pickup	2015 - 2016	L4 2.5L	RWD/4WD \| Automatic
LT	Crew Cab Pickup	2015 - 2016	V6 3.6L	RWD/4WD \| Automatic
LT	Extended Cab Pickup	2015 - 2016	V6 3.6L	RWD/4WD \| Automatic
LTZ	Crew Cab Pickup	2015	V6 3.6L	4WD \| Automatic
WT	Crew Cab Pickup	2015 - 2016	L4 2.5L	RWD/4WD \| Automatic & Manual
WT	Extended Cab Pickup	2015 - 2016	L4 2.5L	RWD/4WD \| Automatic & Manual
WT	Crew Cab Pickup	2015 - 2016	V6 3.6L	RWD/4WD \| Automatic & Manual
WT	Extended Cab Pickup	2015 - 2016	V6 3.6L	RWD/4WD \| Automatic & Manual
Z71	Crew Cab Pickup	2015 - 2016	L4 2.5L	RWD/4WD \| Automatic
Z71	Extended Cab Pickup	2015 - 2016	L4 2.5L	RWD/4WD \| Automatic
Z71	Crew Cab Pickup	2015 - 2016	V6 3.6L	RWD/4WD \| Automatic
Z71	Extended Cab Pickup	2015 - 2016	V6 3.6L	RWD/4WD \| Automatic
LT	Crew Cab Pickup	2016	L4 2.8L DIESEL Turbo	RWD/4WD \| Automatic
LT	Extended Cab Pickup	2016	L4 2.8L DIESEL Turbo	RWD/4WD \| Automatic
WT	Crew Cab Pickup	2016	L4 2.8L DIESEL Turbo	RWD/4WD \| Automatic & Manual
WT	Extended Cab Pickup	2016	L4 2.8L DIESEL Turbo	RWD/4WD \| Automatic & Manual
Z71	Crew Cab Pickup	2016	L4 2.8L DIESEL Turbo	RWD/4WD \| Automatic
Z71	Extended Cab Pickup	2016	L4 2.8L DIESEL Turbo	RWD/4WD \| Automatic

Volt 2016 (tapclick to expand)(tapclick to hide)

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SubmodelSUB- MODEL	Body Style	Years	Engine	Attributes
LT	Hatchback	2016	L4 1.5L PLUG-IN HYBRID EV-GAS (PHEV)	FWD \| Automatic
LTZ	Hatchback	2016	L4 1.5L PLUG-IN HYBRID EV-GAS (PHEV)	FWD \| Automatic
Premier	Hatchback	2016	L4 1.5L PLUG-IN HYBRID EV-GAS (PHEV)	FWD \| Automatic

GMC 1 model(tapclick to expand)(tapclick to hide)

Canyon 2015-2016 (tapclick to expand)(tapclick to hide)

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SubmodelSUB- MODEL	Body Style	Years	Engine	Attributes
Base	Crew Cab Pickup	2015 - 2016	L4 2.5L	RWD/4WD \| Automatic & Manual
Base	Extended Cab Pickup	2015 - 2016	L4 2.5L	RWD/4WD \| Automatic & Manual
Base	Crew Cab Pickup	2015 - 2016	V6 3.6L	RWD/4WD \| Automatic & Manual
Base	Extended Cab Pickup	2015 - 2016	V6 3.6L	RWD/4WD \| Automatic & Manual
SL	Extended Cab Pickup	2015 - 2016	L4 2.5L	RWD \| Manual
SLE	Crew Cab Pickup	2015 - 2016	L4 2.5L	RWD/4WD \| Automatic
SLE	Extended Cab Pickup	2015 - 2016	L4 2.5L	RWD/4WD \| Automatic
SLE	Crew Cab Pickup	2015 - 2016	V6 3.6L	RWD/4WD \| Automatic
SLE	Extended Cab Pickup	2015 - 2016	V6 3.6L	RWD/4WD \| Automatic
SLT	Crew Cab Pickup	2015	L4 2.5L	RWD/4WD \| Automatic
SLT	Extended Cab Pickup	2015	L4 2.5L	RWD/4WD \| Automatic
SLT	Crew Cab Pickup	2015 - 2016	V6 3.6L	RWD/4WD \| Automatic
SLT	Extended Cab Pickup	2015 - 2016	V6 3.6L	RWD/4WD \| Automatic
SLE	Crew Cab Pickup	2016	L4 2.8L DIESEL Turbo	RWD/4WD \| Automatic
SLE	Extended Cab Pickup	2016	L4 2.8L DIESEL Turbo	RWD/4WD \| Automatic
SLT	Crew Cab Pickup	2016	L4 2.8L DIESEL Turbo	RWD/4WD \| Automatic
SLT	Extended Cab Pickup	2016	L4 2.8L DIESEL Turbo	RWD/4WD \| Automatic

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, in plain English.

Shipping & Handling

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

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.

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

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.

Expert Guides

2013-2016 GM ECM Failure: Programming, Symptoms, and Replacement for Camaro, CTS, Malibu & More

This guide covers the common failures, symptoms, and critical programming requirements for the Engine Control Module (ECM) in many 2013-2016 General Motors cars and SUVs.

Read Full Guide →

Related Trouble Codes (OBD-II)

15 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.

Low Fuel Pressure Causes and Fixes

2015-2022 Chevrolet Colorado

Causes for Low Fuel Rail Pressure

2015-2022 GMC Canyon

Rich Fuel System Causes and Fixes

2016-2020 Buick ENVISION

Understanding an Impossible Misfire Code

2016-2022 Buick ENVISION

ECM Processor Fault Causes and Fixes

2013-2017 Cadillac ATS

ECM Processor Fault Causes and Fixes

2015-2016 Chevrolet Colorado

ECM Processor Fault Causes and Fixes

2015-2016 GMC Canyon

Auto Start/Stop System Fault Causes and Fixes

2016-2018 Cadillac ATS

EGR Plausibility and Software Fixes

2016-2017 Chevrolet VOLT

Post Catalyst Fuel Trim Too Rich Fixes

2016-2019 Chevrolet Volt

Fuel Pump Flow Causes and Fixes

2013-2017 Chevrolet CAMARO

Fuel Pump Low Flow Causes and Fixes

2013-2017 Cadillac ATS

↑ A single part can trigger multiple related trouble codes. Each guide is vehicle- and code-specific.

Miscellaneous Information

OEM Part Numbers:
GM: 12655021, 12667433, 12668437, 12668829, 12669741, 12672502, 19420197
Other: 06A905115D, 06B905115D, 06B905115G, 06B905115H, 06B905115J, 06B905115L, 06B905115M, 06B905115N, 06B905115Q, 06B905115R, 12635672, 12670053, 12697989, 12698064, 13433078, 13524916, 13543412, 13544245, 13596071

Fits Years: 2015 2016

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Trusted Since 2007

Nearly two decades of shipping parts to professionals & enthusiasts.

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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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