Is Your Alero Running Rough? Get Back on the Road with Confidence.
There’s nothing more frustrating than a vehicle you can’t rely on. If your 1999 Oldsmobile Alero is suffering from a persistent check engine light, poor fuel economy, shifting problems, or a dreaded no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. This isn’t just an inconvenience; it’s a critical failure that compromises your car’s performance and safety. Instead of guessing with a junkyard part, get the definitive, easy-to-install solution that restores your vehicle’s brain to perfect working order. This is the ideal 1999 Alero PCM replacement to bring back the smooth, reliable driving experience you depend on.
Common Symptoms & Your Solution
A failing PCM can cause a wide range of confusing issues. If you’re experiencing any of the following, this module is your solution:
- Erratic engine performance (stalling, surging, rough idle)
- Transmission shifting harshly or at the wrong times
- A dramatic decrease in fuel mileage
- Check Engine Light is on with PCM-related Diagnostic Trouble Codes (DTCs) like P0601, P0602, P0605
- The engine cranks but refuses to start
- Failure to pass an emissions or smog test
This unit arrives programmed specifically for your vehicle. We use your Vehicle Identification Number (VIN) to flash the module with the very latest software updates directly from GM. This ensures perfect compatibility and function right out of the box, saving you an expensive trip to the dealership for programming.
Features & Benefits
- โ VIN-Programmed for Your Vehicle: No extra programming needed. We handle the complex part so you can focus on the simple installation.
- โ Loaded with Latest GM Updates: Your module comes with the most current software, often correcting factory bugs and improving efficiency and performance.
- โ Direct-Fit Replacement: Guaranteed to match the form and function of your original module, ensuring a hassle-free installation process.
- โ Cost-Effective Solution: Avoid the high costs of a new part and programming fees at a dealership or repair shop.
- โ This unit is backed by our one-year replacement warranty.
An Expert Mechanic’s Tip
Before you install your new PCM, take a moment to inspect and clean your vehicle’s main battery terminals and engine ground straps. A poor ground connection can cause erratic voltage, which can damage sensitive electronics and mimic the symptoms of a failed computer. Ensuring these connections are clean and tight is a simple step that protects your investment and ensures your new module can perform its job perfectly.
Guaranteed Compatibility
This module is a direct replacement for the following service numbers: 09356741, 16236757, 16236757, 9356741, 9357034, 9357440, 9366314. It is confirmed to fit the following vehicles:
- ALERO 99 (LH center dash), 3.4L, with matching ID
- ACHIEVA 98 Electronic Control Module; 6-191 (3.1L)
- BONNEVILLE 98 Electronic Control Module
- CAMARO 98 Electronic Control Module; 6-231 (3.8L)
- CENTURY 98 Electronic Control Module; (6-191, 3.1L)
- CUTLASS 98-99 Electronic Control Module
- EIGHTY EIGHT 98 Electronic Control Module
- FIREBIRD 98 Electronic Control Module; 6-231 (3.8L)
- GRAND AM 98 Electronic Control Module; 6-191 (3.1L)
- GRAND AM 99 (LH center dash), 3.4L, with matching ID
- GRAND PRIX 98 Electronic Control Module
- INTRIGUE 98 Electronic Control Module
- LESABRE 98 Electronic Control Module; (6-231, 3.8L)
- LUMINA CAR 98 Electronic Control Module; (LH engine compartment)
- MALIBU 98 Electronic Control Module; 6-191 (3.1L)
- MONTE CARLO 98 Electronic Control Module
- PARK AVENUE 98 Electronic Control Module; (6-231, 3.8L)
- REGAL 98 Electronic Control Module
- RIVIERA 98 Electronic Control Module; (6-231, 3.8L)
- SILHOUETTE 98 Electronic Control Module; (LH engine compartment)
- SKYLARK 98 Electronic Control Module; 6-191 (3.1L)
- TRANS SPORT 98 Electronic Control Module; (LH engine compartment)
- VENTURE 98 Electronic Control Module; (6-207, 3.4L)
Frequently Asked Questions
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) is essential because it allows us to program the PCM with the exact software, settings, and calibrations specific to your car’s engine, transmission, and options. This ensures the module works perfectly upon installation.
Is this part difficult to install?
The physical installation is typically straightforward, involving disconnecting the battery and swapping the module. However, many GM vehicles of this era require a simple security relearn procedure (often called a VATS relearn) after installation, which can be done without special tools. Instructions are widely available online for this process.
Will this fix my check engine light?
If your check engine light is on due to an internal fault with the original PCM (e.g., codes P0601-P0606), this replacement module will solve the problem. If the light is on for another reason, like a bad oxygen sensor, that issue will need to be addressed separately.
How do I know for sure that my PCM has failed?
While the symptoms listed above are strong indicators, the only way to be 100% certain is through professional diagnosis. However, if you’re experiencing multiple electronic-related issues and have ruled out simpler causes like fuses or wiring, the PCM is the most likely culprit. This 1999 Alero PCM replacement is the most reliable fix.
What if my vehicle isn’t on the compatibility list?
Please do not purchase if your vehicle or service number is not listed. We encourage you to contact us with your vehicle’s year, make, model, and VIN, and we will be happy to help you find the correct part for your specific needs.