Restore Your Vehicle’s Performance with a Reliable, Programmed Engine Computer
If you’re dealing with frustrating issues like your 1999 Chevrolet Lumina stalling, running rough, or refusing to start, a failing Powertrain Control Module (PCM) is often the culprit. As a technician with over two decades of experience, I’ve seen how a faulty engine computer can cause a cascade of problems that are tough to diagnose. This isn’t just a replacement part; it’s a direct solution to get your vehicle running smoothly again. We are offering a tested, used OEM PCM with part number 09361735, sourced from a salvaged vehicle and ready for installation.
The biggest hurdle with replacing a PCM is the programming. This module is the brain of your engine and transmission, and it must be precisely calibrated to your vehicle’s specific Vehicle Identification Number (VIN). We eliminate that expensive and time-consuming step for you. Before we ship your part, our experts will flash it with the latest official GM software updates, using the VIN you provide. This ensures that your replacement 1999 Lumina PCM communicates flawlessly with your car’s other systems, restoring factory performance and fuel efficiency.
From the Diagnostic Bay: The Intermittent Stall Case
I remember a 1999 Pontiac Grand Prix that came into the shop with a maddening intermittent stalling problem. The owner had already replaced the fuel pump and ignition module, but the car would still die randomly at stoplights. No clear trouble codes were stored, just a history of communication errors (U-codes). After checking all the wiring and grounds, we hooked up a scope to the PCM’s main processor. We found the voltage would dip erratically, pointing to an internal failure. We installed a VIN-programmed PCM just like this one, and the problem was solved instantly. It’s a classic example of how a failing computer can mimic other mechanical issues.
Is Your GM Vehicle Showing These PCM Failure Signs?
A failing engine computer can manifest in many ways. If you’re experiencing any of the following, a faulty PCM could be the root cause:
- ✔ Check Engine Light is on with codes for internal module failure (e.g., P0601, P0602, P0605).
- ✔ The engine cranks but won’t start.
- ✔ Unexplained stalling or rough idling.
- ✔ A noticeable drop in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The vehicle fails to communicate with a diagnostic scan tool.
A Straightforward Guide to Your PCM Swap
Installing your pre-programmed PCM is a job most DIYers can handle with basic tools. Following these steps will ensure a smooth installation. Remember to always work safely.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent any accidental reconnection.
- Locate the PCM: On most compatible models like the 1999 Lumina, the PCM is located in the engine compartment on the driver’s side, often attached to the air filter housing. Check your specific model’s service manual for the exact location.
- Disconnect Connectors: Carefully unplug the electrical wiring harnesses from the old PCM. These connectors have locking tabs that need to be released. Do not force them.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket. Keep the hardware, as you may need to reuse it.
- Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and secure it. Reconnect the wiring harnesses, ensuring they click firmly into place.
- Reconnect the Battery: Reattach the negative battery terminal. Your vehicle is now ready to start. Since the module is pre-programmed, no further security relearn or dealer visit is typically required.
Verified Vehicle Compatibility List
This PCM, part number 09361735, is a direct fit for a wide range of GM vehicles. Please verify your vehicle and options below. Matching the part number is crucial for compatibility.
BONNEVILLE 99-00 (LH engine compartment)
CENTURY 99 (LH engine compartment)
CUTLASS 99 (LH center dash), ID 9361735
EIGHTY EIGHT 99 (LH engine compartment)
GRAND PRIX 99-00 (LH engine compartment)
IMPALA 00 (LH engine compartment), 3.4L or 3.8L
INTRIGUE 99 (LH engine compartment)
LESABRE 99-00 (LH front engine compartment)
LUMINA CAR 99 (LH engine compartment) – This is the correct 1999 Lumina PCM.
MALIBU 99 (LH dash), 3.1L
MONTE CARLO 99-00 (LH engine compartment)
MONTANA 99 (LH engine compartment)
PARK AVENUE 99 (LH front engine compartment)
REGAL 99 (LH engine compartment)
RIVIERA 99 (RH dash)
SILHOUETTE 99 (LH engine compartment)
TRANS SPORT 99 (Canada, LH front engine compartment)
VENTURE 99 (LH engine compartment)
Frequently Asked Questions
Is this PCM really plug-and-play?
Yes. We program the module to your specific VIN before shipping. In most cases, this means you can install it and start the car without any additional procedures. Some vehicles may require a simple security relearn procedure, which can be done without special tools and instructions can be found online.
What do you need from me after I order?
After you complete your purchase, you must provide us with your vehicle’s 17-digit VIN. We cannot program and ship your PCM without it. Please double-check the VIN for accuracy before sending.
Is this a new part?
No, this is a high-quality, tested used OEM part that has been sourced from a properly dismantled, salvaged vehicle. This provides an economical and reliable solution compared to a costly new part from a dealer.
Will this fix my car’s problem for sure?
This part will fix your vehicle if the PCM has been correctly diagnosed as the point of failure. While the symptoms listed are common for PCM failure, they can also be caused by other issues (e.g., bad wiring, faulty sensors). We recommend a proper diagnosis by a qualified mechanic to confirm the PCM is the problem.
What is your return policy?
We guarantee that the module will arrive programmed to your VIN and in good working order. If you have any issues upon installation, please contact us immediately for support. Returns are accepted for defective units, but not for misdiagnosed problems.