Restore Your Vehicle’s Performance and Reliability
Is your Buick, Chevrolet, or Pontiac running rough, shifting erratically, or showing a persistent check engine light? A failing Powertrain Control Module (PCM) is often the hidden culprit behind these frustrating and complex drivability issues. This pre-programmed PCM is the direct, reliable solution to restore your vehicle’s original performance and get you back on the road with confidence. We take the guesswork out of the repair by flashing this module with the latest GM software updates using your vehicle’s specific VIN, ensuring a seamless installation process.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a faulty engine computer may be to blame. This module is the definitive fix for:
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) like P0601, P0602, P0605, or P0606
- Poor fuel economy
- Engine stalling, stumbling, or hesitating
- Rough or inconsistent idling
- Harsh or erratic transmission shifting
- Complete no-start condition
By installing our expertly programmed 2004-2005 Buick LeSabre PCM 89017735, you’re not just replacing a part; you’re restoring the central nervous system of your vehicle’s powertrain for dependable operation.
Features & Benefits
- ✔ VIN-Specific Programming: We flash this module with the latest GM software updates using your vehicle’s VIN. This ensures perfect compatibility and function right out of the box, eliminating the need for an expensive trip to the dealership.
- ✔ Restored Engine Performance: Corrects common issues like rough idling, stalling, and hesitation, bringing back the smooth, reliable power you expect from your engine.
- ✔ Improved Fuel Economy: A properly functioning PCM optimizes the air/fuel mixture and ignition timing, which can significantly improve your vehicle’s gas mileage.
- ✔ Corrected Transmission Shifting: Resolves harsh shifting, gear hunting, or failure to shift by restoring proper communication between the engine and transmission.
- ✔ Guaranteed Fitment: Engineered as a direct-fit replacement for OEM part number 89017735 and compatible numbers 12583827 and 12583826 for a wide range of GM vehicles.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight from Our Technicians:
“I’ve seen countless mid-2000s GM vehicles suffer from intermittent electrical gremlins that are nearly impossible to trace. Often, the root cause is a failing PCM. The internal processors and capacitors simply wear out over time. Replacing it with a unit that’s not only tested but also programmed with the latest factory software is crucial. These updates often fix drivability issues that the car had even when it was new. You’re not just replacing a part; you’re giving your car’s brain a fresh start with this 2004-2005 Buick LeSabre PCM 89017735.”
This module is the heart of your vehicle’s engine management system. Don’t settle for a car that’s unreliable or inefficient. Our plug-and-play 2004-2005 Buick LeSabre PCM 89017735 is the smart, simple solution to get your car running like it should.
Frequently Asked Questions
Do I need to do any programming myself?
No. This PCM arrives at your door fully programmed to your vehicle’s specific VIN. It is ready for installation right out of the box, with no need for expensive scan tools or a visit to the dealer.
Where do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as it is required for the programming service.
Is this a simple DIY installation?
For most of the compatible vehicles, the PCM is located in the engine bay and is relatively easy to access. Installation typically involves disconnecting the battery, unplugging the electrical connectors, and unbolting the old module to swap in the new one. Many of our customers perform the installation themselves in under an hour.
What are the main signs of a bad PCM?
The most common signs include a constant check engine light, unexplained performance issues like poor acceleration or stalling, decreased fuel mileage, and erratic automatic transmission behavior. In severe cases, the vehicle may not start at all.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the PCM (indicated by codes like P0601-P0606), then this part is the correct solution. However, the check engine light can be triggered by many other components. It is always best to have the codes read to properly diagnose the issue first.
How does the warranty work?
This unit is backed by our one-year replacement warranty. If the module fails within one year of the purchase date, we will provide a replacement unit. Please contact us for details on the process.