2005 Envoy XUV Engine Control Module 12597191 Programmed to Your VIN

Is Your 2005 GM Truck or SUV Acting Up?

If you’re behind the wheel of a 2005 Envoy XUV, Trailblazer, or another GM vehicle with the 5.3L V8, you know it’s a dependable workhorse. But when the brain of the operation—the Engine Control Module (ECM)—starts to fail, it can cause some of the most frustrating and difficult-to-diagnose problems I see in my shop. Your vehicle might be stalling for no reason, refusing to start, shifting erratically, or showing a check engine light that just won’t go away.

Over my 20+ years turning wrenches, I’ve seen countless vehicles from this era come in with these exact symptoms. The owner has often replaced sensors, checked wiring, and is at their wit’s end. More often than not, the culprit is an internal failure within the original ECM. Heat cycles, vibration, and age can cause microscopic cracks in the circuit board or component failure, leading to a cascade of electronic gremlins.

Common Symptoms of a Failing 2005 GM ECM

A faulty Engine Control Module can manifest in many ways. If you’re experiencing any of the following, your ECM is a prime suspect:

• ✔ Check Engine Light: You may see codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault), which are direct indicators of an internal ECM failure.
• ✔ No-Start Condition: The engine cranks but won’t fire up because the ECM isn’t commanding fuel or spark correctly.
• ✔ Stalling: The vehicle may stall intermittently while driving or when coming to a stop, creating a dangerous situation.
• ✔ Poor Performance & Fuel Economy: Without proper engine management, you’ll notice a significant drop in power, rough idling, and more frequent trips to the gas station.
• ✔ Communication Issues: Your scan tool may not be able to communicate with the ECM, or you may see U-codes indicating a loss of communication with other modules.

The Direct-Fit, Programmed Solution

This isn’t just a replacement part; it’s a complete solution. This Engine Control Module, part number 12597191, is the answer to these complex electronic issues. The biggest hurdle with replacing an ECM has always been the programming. In the past, you’d have to install the module and then have your vehicle towed to a dealership for expensive programming. We eliminate that step entirely.

How it Works:

1. You purchase this ECM.
2. You provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN).
3. Our technicians use your VIN to load the latest, most stable GM-approved software directly onto the module.
4. We ship the fully programmed ECM to you. Installation is typically straightforward, and in most cases, the vehicle will start and run correctly without any further procedures.

Guaranteed Compatibility

This module is a direct replacement for several original equipment service numbers. If your original ECM has any of the following numbers on its label, this part is the correct fit for you:

• ✔ 12578554
• ✔ 12596771
• ✔ 12597191
• ✔ 12597883
• ✔ 19210071

This part will fit these 2005 makes and models with these options:

Please verify your vehicle and engine option below. Location notes are provided for your convenience.

• ✔ Buick Rainier: 5.3L (Located on LH engine)
• ✔ Chevrolet Corvette: (Located in RH engine compartment)
• ✔ Chevrolet SSR: (Located next to the air box)
• ✔ Chevrolet Trailblazer EXT: 5.3L (Located on LH engine)
• ✔ GMC Envoy / Envoy XL / Envoy XUV: 5.3L (Located on LH engine)
• ✔ Isuzu Ascender: 5.3L (Located on LH engine)
• ✔ Pontiac GTO: Main ECM (Located on LH engine)
• ✔ Saab 9-7X: 8 cylinder (Located on LH engine)

Don’t let a faulty ECM keep your vehicle off the road. This pre-programmed module is the most reliable and efficient way to restore your vehicle’s performance and dependability. Get the brain of your engine working perfectly again.