Restore Your GM Vehicle’s Performance and Reliability
If you’re dealing with a 1998 Buick Regal that’s running rough, shifting erratically, or constantly throwing a check engine light, a failing Powertrain Control Module (PCM) is a very likely culprit. As the central computer for your engine and transmission, its health is critical to your car’s operation. This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the hassle out of the repair by pre-programming this module with the latest GM software updates, using your vehicle’s specific VIN. This ensures perfect communication between components and restores the smooth, efficient performance you’ve been missing.
Case Study: The Intermittent 3.8L Stall
I remember a 1998 LeSabre that came into my bay with a maddening problem: it would randomly stall at stoplights, but only after it was fully warmed up. There were no consistent trouble codes, just a vague history of a communication error. We checked fuel pressure, sensors, and wiring harnesses for hours. On a hunch, I used a heat gun on the PCM while the engine was idling. Within 30 seconds, the engine sputtered and died. The internal processor was failing under heat stress. Replacing the PCM with a properly programmed unit like this one solved the problem instantly. These intermittent issues are classic signs of a failing computer, and a direct replacement is often the only permanent fix.
Is Your Vehicle Showing These Symptoms?
- ✔ Unexplained Check Engine Light illumination
- ✔ Engine stalling, stumbling, or hesitating
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Poor fuel economy
- ✔ Failure to pass an emissions test
- ✔ No-start or intermittent starting conditions
- ✔ Diagnostic Trouble Codes (DTCs) such as P0601, P0602, or P0605 pointing to internal module failure
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electronic work.
- ✔ Locate the PCM: On many of these GM vehicles, the PCM is located inside the air filter box in the engine compartment for easy access. Remove the air filter cover to expose the module.
- ✔ Disconnect Connectors: Carefully unclip the wiring harness connectors from the old PCM. There are typically two or three large connectors with locking tabs.
- ✔ Remove the Old Module: Unbolt or unclip the old PCM from its mounting bracket and remove it from the vehicle.
- ✔ Install the New Module: Seat your new, pre-programmed PCM into the mounting bracket and securely re-attach the wiring harness connectors. You should hear a ‘click’ as they lock in place.
- ✔ Final Steps: Reinstall the air filter box cover and reconnect the negative battery terminal. In many cases, you may need to perform a simple security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of GM vehicles. Please confirm your model and engine options from the list below. This part is compatible with service numbers: 09356741, 16236757, 9356741, 9357034, 9357440, and 9366314.
ALERO 1999 (3.4L, ID 16236757, 9356741, 9366314, 9357034, 9347440, 9357440)
BONNEVILLE 1998
CAMARO 1998 (6-231, 3.8L)
CENTURY 1998 (6-191, 3.1L)
CUTLASS 1998 & 1999 (ID 16236757)
EIGHTY EIGHT 1998
FIREBIRD 1998 (6-231, 3.8L)
GRAND AM 1998 (6-191, 3.1L) & 1999 (3.4L, ID 16236757, 9356741, 9366314, 9357034, 9347440)
GRAND PRIX 1998
INTRIGUE 1998
LESABRE 1998 (6-231, 3.8L)
LUMINA CAR 1998 (LH engine compartment)
MALIBU 1998 (6-191, 3.1L)
MONTE CARLO 1998
PARK AVENUE 1998 (6-231, 3.8L)
REGAL 1998
RIVIERA 1998 (6-231, 3.8L)
SILHOUETTE 1998 (LH engine compartment)
SKYLARK 1998 (6-191, 3.1L)
TRANS SPORT 1998 (LH engine compartment)
VENTURE 1998 (6-207, 3.4L)
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software and calibrations your vehicle’s specific configuration requires. This ensures seamless compatibility and optimal performance, eliminating the need for expensive dealer programming.
Is this a simple plug-and-play installation?
Yes, for most vehicles. Because the module arrives programmed to your VIN, the physical installation is straightforward. Some GM vehicles may require a simple, no-tool security relearn procedure that takes about 10-15 minutes. We provide instructions for this process.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM also controls transmission functions, including shift points and line pressure. If your module is failing, it can cause harsh shifts, delayed engagement, or other transmission-related issues. A new PCM often resolves these problems.
What does ‘flashed with the newest updates’ mean?
Over the life of a vehicle, manufacturers like GM release software updates to fix bugs, improve efficiency, and enhance performance. We ensure your replacement module is loaded with the very latest software available for your VIN, giving you a part that’s better than the original.