Is Your 2005 GM Truck or SUV Acting Possessed?
If you’re dealing with a check engine light that won’t go away, erratic engine behavior, a no-start condition, or transmission shifting problems, the root cause is often the very brain of your vehicle: the Engine Control Module (ECM). For owners of the robust 2005 GMC Envoy XUV and other GM vehicles with the 5.3L engine, a failing ECM can be a massive headache, leading to incorrect diagnoses and wasted money on other parts.
“A customer’s 2005 Trailblazer EXT came in last week with these exact symptoms…”
The truck would crank but not start intermittently. When it did run, it shifted hard from first to second and had a persistent P0606 code (ECM/PCM Processor Fault). The owner had already replaced the crank sensor and two ignition coils with no luck. After confirming power and ground to the module were solid, we knew the internal processor of the original ECM was failing. It’s a classic failure mode I’ve seen on hundreds of these P59 controllers. This programmed ECM was the direct, final fix.
The Expert Solution: A Reliable, Programmed ECM
Don’t let a faulty computer sideline your vehicle. This Engine Control Module is the definitive solution to restore your engine’s proper function and reliability. It’s not just a part in a box; it’s a comprehensive fix that arrives ready for installation. The biggest hurdle with replacing an ECM is the programming—a step that typically requires a trip to the dealership and expensive specialty tools. We handle that for you.
How Our Programming Service Works for You
We take the complexity out of the repair. When you purchase this module, you provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians then use that VIN to flash the ECM with the latest, most stable software calibration directly from General Motors. This ensures your engine operates exactly as the manufacturer intended, with all the correct parameters for your specific vehicle options.
- ✔ Eliminates Guesswork: No need to worry if you’re getting the right software. We match it precisely to your VIN.
- ✔ Saves Time & Money: You skip the expensive dealership appointment for programming. This is a huge cost savings.
- ✔ Ready for Installation: The module arrives at your door ready to be installed. Once installed, you will only need to perform the simple vehicle anti-theft relearn procedure (often called the PASS-Key or V.A.T.S. relearn), which requires no tools.
- ✔ Updated Software: We load the newest GM updates, which can resolve factory bugs and improve drivability and performance over your original, outdated software.
Is This The Right Part For Your Vehicle?
This ECM, part number 19210071, is a direct replacement for several original equipment service numbers. If your original module has one of the following numbers on its sticker, this part is a 100% compatible replacement:
- ✔ 12578554
- ✔ 12596771
- ✔ 12597191
- ✔ 12597883
- ✔ 19210071
This module is confirmed to fit the following 2005 models. Please verify your engine size and any notes below:
Guaranteed Fitment:
Chevrolet Corvette: 2005 (RH engine compartment)
Chevrolet SSR: 2005 (next to air box)
Chevrolet Trailblazer EXT: 2005 (5.3L, LH engine)
GMC Envoy / Envoy XL / Envoy XUV: 2005 (5.3L, LH engine)
Isuzu Ascender: 2005 (5.3L, LH engine)
Pontiac GTO: 2005 (main, LH engine)
Saab 9-7X: 2005 (8 cylinder, LH engine)