Restore Your SUV’s Brain and Get Back on the Road with Confidence
If your 2015-2016 GMC Yukon XL 1500 is giving you headaches with a persistent Check Engine Light, rough idling, stalling, or even refusing to start, the problem often lies with a failing Engine Control Module (ECM). As the central computer of your vehicle, a faulty ECM can cause a cascade of frustrating and seemingly unrelated issues. I’ve seen it countless times in my 20+ years on the shop floor: a perfectly good engine held hostage by a failing computer. This isn’t just an inconvenience; it’s a reliability issue that can leave you stranded.
We offer a straightforward, reliable solution. This is a genuine GM Engine Control Module, part number 12662034, that we professionally program to your vehicle’s specific Vehicle Identification Number (VIN). This means it arrives at your doorstep loaded with the latest GM factory software updates, ready for installation. You get to skip the expensive dealership visit, the towing fees, and the extra charges for programming. This is the direct, effective fix you need to restore your Yukon’s performance and dependability.
Case Study: A Tricky Diagnosis
I remember a 2015 Yukon XL that came into the bay with a complaint of intermittent stalling at stoplights and a random no-start condition that would fix itself after a few minutes. The owner had already replaced the battery and alternator. We scanned it and found a P0606 (ECM/PCM Processor Fault) code stored, but no active Check Engine Light. After checking all the power and ground circuits to the module, which is a critical first step, we determined the ECM itself was failing internally. Instead of a costly dealer replacement, we sourced a pre-programmed unit like this one. The customer was able to perform the final, simple installation steps himself, saving hundreds in labor and programming fees. His Yukon has been running perfectly ever since. This highlights why a reliable, pre-programmed 2015-2016 Yukon XL ECM is often the smartest repair.
Is Your Yukon Showing These Signs of a Bad ECM?
- ✔ Unexplained Check Engine Light illumination.
- ✔ Stored diagnostic trouble codes (DTCs) like P0601, P0606, or U0100.
- ✔ The engine cranks but refuses to start.
- ✔ Noticeable drop in fuel economy.
- ✔ Rough or erratic engine idle.
- ✔ Hesitation or stumbling during acceleration.
- ✔ Intermittent stalling for no apparent reason.
- ✔ Automatic transmission shifting issues.
A Straightforward Guide to Installation
Installing your new 2015-2016 Yukon XL ECM is a manageable job for a confident DIYer or any professional technician. Since we handle the complex programming, your job is the physical swap. Always consult a service manual for your specific vehicle, but here are the general steps:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the ECM: On the Yukon XL, the ECM is typically found in the engine compartment on the driver’s side (LH side), near the front.
- Disconnect Connectors: Carefully release the locking tabs and unplug the electrical wiring harnesses from the old ECM. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed ECM in place and secure the bolts.
- Reconnect Everything: Plug the wiring harnesses firmly back into the new module until they click, and then reconnect your battery terminal.
- Security Relearn (If Required): In many cases, a simple security relearn procedure is needed, which can often be done without special tools. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. We provide instructions for this simple final step.
Verified Fitment For These GM Vehicles
This module is a direct replacement for part number 12662034 and is compatible with several other part numbers, ensuring wide coverage. It is guaranteed to fit the following vehicles, among others. Please verify your part number or contact us with your VIN if you have questions.
- ✔ GMC YUKON / YUKON XL 1500: 2015-2016
- ✔ Chevrolet SILVERADO 1500 PICKUP: 2014-2016
- ✔ Chevrolet SUBURBAN 1500 / TAHOE: 2015-2016
- ✔ GMC SIERRA 1500 PICKUP / SIERRA DENALI 1500: 2014-2016
- ✔ Cadillac ESCALADE / ESCALADE ESV: 2015-2016
- ✔ Chevrolet CORVETTE: 2014-2016
- ✔ Chevrolet CAMARO: 2016 (6.2L)
- ✔ Cadillac ATS / CTS / XTS: 2014-2016 (with specific engines)
- ✔ Chevrolet COLORADO / GMC CANYON: 2015-2016 (3.6L)
Ordering this 2015-2016 Yukon XL ECM is your first step toward a lasting repair. Simply provide your VIN at checkout, and we’ll handle the rest.