Restore Peak Performance to Your GM Vehicle
Is your Cadillac, Chevy, or GMC acting up? A flickering check engine light, rough idling, stalling, or a sudden drop in fuel economy are more than just annoyances—they’re often symptoms of a failing Engine Control Module (ECM). As the ‘brain’ of your vehicle, the ECM controls everything from fuel mixture and ignition timing to transmission shifting. When it falters, the entire vehicle’s performance suffers. With over 20 years of experience under the hood, I’ve seen firsthand how a faulty ECM can cause frustrating, hard-to-diagnose problems. This is the reliable, straightforward solution you’ve been looking for.
This isn’t just a replacement part; it’s a complete solution. We take the hassle and high cost out of the equation by pre-programming this 2014-2016 CTS Engine Control Module to your vehicle’s specific Vehicle Identification Number (VIN). This means it arrives at your door with the latest GM software updates already installed, ready for a simple installation. You get to skip the expensive dealership visit for programming, saving you time and hundreds of dollars. It’s the go-to fix I recommend to both seasoned mechanics and determined DIYers.
Is Your Vehicle Showing These Signs of ECM Failure?
- ✔ Unexplained Check Engine Light (CEL) with codes like P0601, P0602, P0606, or U0100.
- ✔ The engine cranks but refuses to start.
- ✔ Noticeable loss of power and poor acceleration.
- ✔ A significant decrease in fuel efficiency.
- ✔ Rough or erratic idling.
- ✔ Intermittent stalling for no apparent reason.
- ✔ Harsh or incorrect transmission shifting.
Case Study: A Tricky Diagnosis
A customer brought in a 2015 Cadillac CTS with an issue that baffled two other shops: it would intermittently fail to start, but only after it had been driven and sat for about an hour. There were no consistent trouble codes. We monitored the live data and noticed the 5-volt reference signal from the ECM would occasionally drop out during the no-start condition. This tiny electrical inconsistency was enough to prevent the engine from firing. After confirming all wiring was intact, we pinpointed the internal circuitry of the original ECM as the culprit. Installing a VIN-programmed module like this one resolved the issue permanently. It’s a classic example of how ECM failure can be subtle but critical.
Your Straightforward Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the ECM: On most of these vehicles, the ECM is found in the engine bay (often on the driver’s side front) or on the firewall. Refer to your vehicle’s service manual for the exact location.
- ✔ Disconnect Connectors: Carefully unclip the wiring harness connectors from the old ECM. They have locking tabs, so be gentle to avoid damage.
- ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- ✔ Install the New Module: Mount your new, pre-programmed ECM onto the bracket and securely fasten the bolts.
- ✔ Reconnect Everything: Plug the wiring harnesses back into the new module until they click securely in place. Reconnect the negative battery terminal.
- ✔ Security Relearn: In many GM vehicles, a security relearn procedure may be required. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows the new ECM to sync with your vehicle’s anti-theft system.
Verified Fitment for Your General Motors Vehicle
This module is a direct-fit replacement for a wide range of GM cars, trucks, and SUVs. Please verify your vehicle, year, and engine options below. This part is a compatible replacement for part numbers: 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, and 12669318.
SIERRA 1500 PICKUP 14-16
SIERRA DENALI 1500 14-16
TAHOE 15-16
SUBURBAN 1500 15-16
YUKON & YUKON XL 1500 15-16
ESCALADE & ESCALADE ESV 15-16
CAMARO 16 (6.2L)
CORVETTE 14-16
CTS 14-16 (3.6L, 6.2L)
ATS 14-16 (3.6L)
XTS 14-16 (3.6L)
COLORADO 15-16 (3.6L)
CANYON 15-16 (3.6L)
Note: Please check specific options and ID numbers listed in the original data to ensure an exact match.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the Engine Control Module with the precise software and calibrations specific to your vehicle’s engine, transmission, and options. This ensures seamless communication between all vehicle systems and guarantees proper functionality right out of the box.
Is any additional programming needed after installation?
No! This ECM comes fully programmed with the latest GM updates. In most cases, the only other step is a simple security relearn procedure (detailed in the installation guide) that you can do yourself in about 30 minutes. This avoids a trip to the dealership.
How can I be sure my old ECM is the problem?
Common symptoms include a no-start condition, poor fuel economy, erratic engine behavior, and specific diagnostic trouble codes (DTCs) like P0601 (Internal Control Module Memory Check Sum Error). While these are strong indicators, it’s always best to have a qualified mechanic perform a full diagnostic to rule out wiring or sensor issues.
Is this a used part?
This is a high-quality, inspected, and tested recycled OEM part. We ensure it meets or exceeds original factory specifications. By programming it with fresh, updated software, we provide a reliable and cost-effective alternative to a brand-new, expensive dealership part.
Where is the part number on my original module?
The part number is typically printed on a sticker affixed to the case of your original ECM. You can cross-reference it with the compatible part numbers listed on this page to confirm a match.