Restore Your Vehicle’s Performance and Reliability
Is your Oldsmobile Cutlass, Pontiac Grand Am, or another trusted GM vehicle suddenly giving you trouble? If you’re dealing with a persistent Check Engine Light, rough idling, stalling, or a frustrating no-start condition, the problem often points directly to a failing Powertrain Control Module (PCM). As the central computer of your vehicle, a faulty PCM can disrupt everything from fuel delivery to transmission shifting, making your car unreliable and unsafe. With over 20 years of hands-on diagnostic experience, I’ve seen countless drivers replace expensive sensors and parts, only to find the root cause was the PCM all along.
This replacement PCM, part number 16236757, is the definitive solution. We take the guesswork and high costs out of the equation by programming the module specifically for your vehicle using your VIN. This ensures it arrives with the latest GM software updates, ready for a straightforward installation. You get a reliable part that restores factory performance without a mandatory, expensive trip to the dealership for programming.
A Technician’s Notebook
I remember a 1998 Buick LeSabre that came into my shop with an intermittent stalling problem that no one could solve. The owner had already replaced the ignition control module and crank sensor. When I connected my scan tool, I saw no hard fault codes, which can be tricky. However, by watching the live data stream, I noticed the fuel injector pulse width was behaving erratically just before it would stall. This pointed to the processor, not a sensor. We installed one of these VIN-programmed PCMs, performed the security relearn, and the car ran perfectly. It’s a classic example of how a failing PCM can create ghost-like issues that parts-swapping won’t fix.
Common Signs of a Failing PCM
If your vehicle is exhibiting any of these symptoms, a faulty PCM is a likely culprit. A failing module can trigger a variety of Diagnostic Trouble Codes (DTCs), including the notorious P0601, P0605, or P0606, which directly indicate an internal computer fault.
- ✔ Persistent Check Engine Light
- ✔ Engine stalling or misfiring
- ✔ Vehicle won’t start
- ✔ Poor or erratic automatic transmission shifting
- ✔ A sudden drop in fuel economy
- ✔ Failure to pass an emissions test
Your Guide to a Simple Installation
Replacing the PCM on these vehicles is a job most DIY enthusiasts can handle in their own driveway. Our pre-programming service makes it a true plug-and-play repair.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting work.
- Locate the PCM: On most of these GM models, the PCM is located inside the vehicle’s air filter box in the engine compartment or under the passenger side of the dashboard.
- Disconnect and Remove: Carefully unplug the electrical wiring harnesses. They have locking tabs that need to be released. Once unplugged, unbolt the old module and remove it.
- Install the New Module: Seat the new PCM in the mounting bracket and secure it. Reconnect the wiring harnesses, ensuring they click firmly into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Security Relearn: Your vehicle may require a simple security relearn procedure to recognize the new PCM. This typically involves turning the key to the ‘ON’ position for 10 minutes, off for 10 seconds, and repeating this cycle three times. This allows the anti-theft system to sync with the new module.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 09356741, 16236757, 9357034, 9357440, and 9366314. It is guaranteed to fit the following vehicles:
ALERO 99 (3.4L)
BONNEVILLE 98
CAMARO 98 (3.8L)
CENTURY 98 (3.1L)
CUTLASS 98-99
EIGHTY EIGHT 98
FIREBIRD 98 (3.8L)
GRAND AM 98 (3.1L)
GRAND AM 99 (3.4L)
GRAND PRIX 98
INTRIGUE 98
LESABRE 98 (3.8L)
LUMINA CAR 98
MALIBU 98 (3.1L)
MONTE CARLO 98
PARK AVENUE 98 (3.8L)
REGAL 98
RIVIERA 98 (3.8L)
SILHOUETTE 98
SKYLARK 98 (3.1L)
TRANS SPORT 98
VENTURE 98 (3.4L)
Frequently Asked Questions About Your 1998-1999 Cutlass PCM
Frequently Asked Questions
How do I provide my Vehicle Identification Number (VIN)?
It’s easy! Simply enter your 17-digit VIN in the designated box on the checkout page or send it to us in a message after your purchase. We cannot program and ship your module without it.
Is any additional programming required once I install it?
No. We handle all the critical programming before shipment. The only thing you may need to do is the simple, 15-30 minute security relearn procedure, which requires no special tools.
Will this fix my specific problem?
This PCM is a direct solution for issues caused by a failing module, such as internal processor faults (P0601), poor engine performance, and communication errors. While it fixes a very common point of failure, always ensure your vehicle has been properly diagnosed.
Is this part difficult to install for a DIYer?
Not at all. For most of the compatible models, the PCM is easily accessible. With basic hand tools and our step-by-step guide, most home mechanics can complete the swap in under an hour.
What if my original part number is not 16236757?
No problem. This module is the correct service replacement for several part numbers, including 09356741, 9357034, and others listed above. As long as your vehicle is on the compatibility list, this is the correct part for you.