Is Your SUV Running Rough? Get the Definitive Fix.
If your GMC Envoy, Chevy Trailblazer, or Buick Rainier is suffering from a persistent check engine light, erratic shifting, stalling, or a frustrating no-start condition, a failing Powertrain Control Module (PCM) is the most likely culprit. This critical component is the brain of your vehicle, and when it fails, it can cause a host of problems that leave you stranded. This professionally programmed PCM is the direct-fit, reliable solution to restore your vehicle’s performance and get you back on the road with confidence.
Common Symptoms & Your Direct-Fit Solution
A faulty PCM can manifest in many ways. You might be experiencing one or more of the following issues:
- Persistent Check Engine Light (CEL) with codes like P0601, P0605, or P0606.
- Rough or Unstable Idle that makes the vehicle shake.
- Engine Stalling or Misfiring, especially when warm.
- Poor Fuel Economy for no apparent reason.
- Harsh or Incorrect Transmission Shifting.
- Complete No-Start Condition where the engine cranks but won’t fire up.
This isn’t just a replacement part; it’s a complete solution. We program this 2003-2005 Envoy PCM 16255757 specifically to your vehicle’s VIN, loading it with the newest software updates from GM. This ensures it arrives ready for a straightforward installation, eliminating the compatibility guesswork and the need for an expensive trip to the dealership for programming.
Features & Tangible Benefits
- ✔ VIN-Specific Programming: Your new PCM arrives at your door pre-programmed for your exact vehicle. This means a smoother installation process and optimal performance right out of the box.
- ✔ Direct-Fit Replacement: Engineered as a perfect replacement for multiple part numbers, including 12573576, 12574976, 12577955, 12584593, and 19210065, ensuring a flawless fit.
- ✔ Resolves Common Failures: Specifically addresses the root cause of common GM electrical and performance issues, putting an end to frustrating diagnostic chases.
- ✔ Restores Original Performance: By correcting engine and transmission commands, this module restores the smooth power delivery and fuel efficiency you expect from your truck.
- ✔ Cost-Effective Dealership Alternative: Get a fully programmed, updated module without the high labor costs and scheduling hassles of a dealership service center.
- ✔ Peace of Mind Included: This unit is backed by our one-year replacement warranty, so you can purchase with confidence.
Expert Insight from a 20-Year Technician
I’ve seen countless GMT360 platform vehicles like the Envoy and Trailblazer come into the shop with bizarre electrical gremlins that stump even experienced mechanics. After hours of chasing wires, the root cause is often a failing PCM. The internal circuit boards can develop micro-fractures or processor faults over time, leading to communication errors or incorrect commands. The key to a lasting repair isn’t just swapping the box—it’s ensuring the replacement has the correct, updated software for that specific vehicle. A VIN-programmed module like this 2003-2005 Envoy PCM 16255757 is the only way to do the job right and prevent a comeback.
Frequently Asked Questions
Is this a plug-and-play installation?
This PCM comes fully programmed to your VIN, making the electronic part plug-and-play. However, like any PCM replacement on these GM vehicles, you may need to perform a security relearn procedure (also known as a CASE relearn) with a capable scan tool to sync the module with your vehicle’s anti-theft system and crankshaft position sensor. This is a standard step for this type of repair.
How do I provide my VIN number?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically reply to your order confirmation email or follow the instructions provided after checkout. We cannot ship your part until we receive the VIN.
Will this fix my specific problem?
This module is the definitive solution for a faulty PCM. If your vehicle has been properly diagnosed with a failed engine computer, this part will resolve the related issues. It is important to ensure other components, such as sensors or wiring, are not the cause of your problem.
Does this fit vehicles other than the GMC Envoy?
Yes. This PCM is compatible with a wide range of GM SUVs from this era, including the Chevrolet Trailblazer, Buick Rainier, Oldsmobile Bravada, Isuzu Ascender, and Saab 9-7X. Please verify your original part number against the list provided to ensure a perfect match.
What part numbers does this unit replace?
This PCM is a direct replacement for the following part numbers: 12573576, 12574976, 12577955, 12584593, 16255757, and 19210065. If your original module has one of these numbers, this is the correct part for you.