Is Your Late-90s GM Acting Up? You’re Not Alone.
If your Oldsmobile Alero, Pontiac Grand Am, or another GM vehicle from that era is suddenly stalling, shifting erratically, or throwing a persistent Check Engine Light, the Powertrain Control Module (PCM) is a very likely culprit. Over my 20+ years in the shop, I’ve seen hundreds of these specific modules fail. It’s often not a major mechanical issue, but a failure of the vehicle’s electronic ‘brain’. Heat cycles and age can cause internal solder joints to crack, leading to intermittent connections and unpredictable behavior that can be incredibly frustrating to diagnose.
The Direct, Dealer-Free Solution for Your Vehicle
This isn’t just a replacement part; it’s a complete solution. We are offering a Powertrain Control Module, service number 09356741, that comes fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). When you order, simply provide us with your VIN, and we’ll flash the module with the latest GM software updates before it even leaves our facility. This critical step ensures that the PCM communicates perfectly with your engine, transmission, and all related systems, restoring the original performance and reliability you expect.
- ✔ Eliminate Guesswork: Solves common issues like no-start conditions, poor fuel economy, harsh shifting, and false sensor codes.
- ✔ Save Time & Money: No need for an expensive trip to the dealership for programming. This module arrives ready for installation.
- ✔ Latest Software: We load the most current GM calibrations, which often address factory bugs and improve performance over the original software.
- ✔ Guaranteed Compatibility: Programmed specifically for your car’s VIN, ensuring a perfect match.
Expert Pro Tip: Check Your Grounds Before Installation
Before you plug in your new PCM, take five extra minutes to locate and clean the main engine-to-chassis ground straps. On these GM platforms, a corroded or loose ground can cause voltage irregularities that damage sensitive electronics, including the PCM. A simple wire brush cleaning can prevent a repeat failure and is one of the most common things I see overlooked during this repair.
Simple Installation Guide
You don’t need to be a master technician to install this part. With basic hand tools, you can get your car running right in your own driveway.
- Safety First: Disconnect the negative terminal from your car’s battery and wait about 10 minutes for any residual power to dissipate.
- Locate the PCM: On most compatible vehicles like the 1999 Alero or Grand Am, the PCM is located in the center console area, accessible from the passenger or driver’s side footwell. On vans like the Venture or Silhouette, it’s often in the engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Once unplugged, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed module into place. Firmly reconnect the electrical harnesses, making sure the locking tabs click securely into place.
- Reconnect Power: Reattach the negative battery terminal. The vehicle may need to go through a brief ‘re-learn’ procedure, which usually involves letting it idle for a few minutes. Your check engine light should be off, and performance restored.
Verifying Your Part Number
This module is a direct replacement for several original equipment service numbers. Please check the sticker on your current module to ensure it matches one of the following compatible numbers:
- 09356741
- 16236757
- 9357034
- 9357440
- 9366314
This part is a confirmed fit for a wide range of 1998 and 1999 GM vehicles, including the Buick Century, LeSabre, Park Avenue, Regal, Riviera, Skylark; Chevrolet Camaro, Lumina, Malibu, Monte Carlo; Oldsmobile Achieva, Alero, Cutlass, Eighty Eight, Intrigue, Silhouette; and Pontiac Bonneville, Firebird, Grand Am, Grand Prix, and Trans Sport. Please refer to the detailed fitment list to confirm your specific model and engine options.