Is Your Buick LeSabre Running Rough?
If your 1999 or 2000 Buick LeSabre is experiencing perplexing issues like stalling, erratic idling, a persistent Check Engine Light, or even a no-start condition, the culprit is often a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it begins to fail, it can cause a cascade of frustrating and seemingly unrelated problems, making diagnosis a real challenge.
This is a genuine, used GM Powertrain Control Module with part number 09361735, meticulously sourced from a salvaged vehicle. We eliminate the biggest hurdle of replacement by programming the module specifically to your vehicle’s Vehicle Identification Number (VIN). This critical step ensures that the computer has the correct software and calibrations for your LeSabre’s specific engine, transmission, and options, making for a seamless installation process.
From the Diagnostic Bay
We had a 1999 Pontiac Bonneville (which uses this exact same PCM) come into the shop with an intermittent no-start condition that was driving the owner crazy. It would start fine for a week, then refuse to crank for two days. There were no consistent trouble codes, and the battery, starter, and alternator all tested good. After hours of tracing wires, we noticed the 5-volt reference signal from the PCM would occasionally drop out. We swapped in a known-good, programmed PCM, and the problem vanished instantly. It’s a classic example of how a failing computer can create ghost-like issues that defy standard diagnostic procedures.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light is on with various, often inconsistent, trouble codes.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Rough or erratic idling.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or delayed transmission shifting.
- ✔ Vehicle fails to start, even with a good battery and starter.
- ✔ Communication errors with diagnostic scan tools.
Your Plug-and-Play Solution: The 1999-2000 LeSabre PCM
Don’t let a faulty computer keep your reliable Buick off the road. Our service provides a straightforward and effective solution. By purchasing this module, you are getting a functional, tested component that is pre-flashed with the latest GM software updates for your specific vehicle. Simply provide us with your VIN during or after checkout, and our technicians will handle the complex programming. The module you receive will be ready to install, often only requiring a simple security relearn procedure upon installation, which can typically be done without special tools.
Wide Compatibility Across GM Platforms
This versatile module, identified by part number 09361735, was used across a wide range of GM vehicles from 1999 to 2000. Please verify your part number and check the compatibility list below to ensure a perfect match for your car.
- Buick: Century (99), LeSabre (99-00), Park Avenue (99), Regal (99), Riviera (99)
- Chevrolet: Impala (00), Lumina (99), Malibu (99), Monte Carlo (99-00), Venture (99)
- Oldsmobile: Cutlass (99), Eighty Eight (99), Intrigue (99), Silhouette (99)
- Pontiac: Bonneville (99-00), Grand Prix (99-00), Montana (99), Trans Sport (99)
Note: Specific engine and option compatibility is crucial. Please match your original part number or consult the detailed fitment list.
Frequently Asked Questions
Do I need to get this PCM programmed?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s 17-digit VIN when you order, and the module will arrive ready to be installed.
Is this a new part?
This is a high-quality, used OEM part that has been carefully removed from a salvaged vehicle and tested for functionality. This provides an affordable and reliable alternative to expensive new modules.
Where is the PCM located on my 1999 Buick LeSabre?
On the 1999-2000 Buick LeSabre, the Electronic Control Module (PCM) is typically located in the LH (driver’s side) front engine compartment, often inside the air filter housing for protection.
What is the process after I place my order?
After you complete your purchase, you will need to send us your vehicle’s VIN. Once we receive the VIN, our technicians will program the module with the correct GM software. The part will then be securely packaged and shipped to you.
Will I need to perform a security relearn procedure?
Yes, most GM vehicles of this era, including the LeSabre, use a Passlock or Passkey anti-theft system. After installing the new PCM, you will likely need to perform a simple security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes, 3 times in a row. Instructions are readily available online.