Restore Peak Performance to Your GM Truck or Car
Is your 1999-2000 GMC Sierra 1500, Silverado, or another compatible GM vehicle suddenly running rough, refusing to start, or throwing confusing check engine light codes? You’re not just dealing with an annoyance; you’re facing a failure of the vehicle’s central command center. The Powertrain Control Module (PCM) is the brain of your engine and transmission, and when it fails, it can cause a cascade of frustrating and unpredictable problems. This isn’t just a part; it’s the solution to getting your reliable vehicle back.
As a technician with two decades of experience under the hood, I’ve seen firsthand how a faulty PCM can mimic a dozen other expensive problems. Before you start throwing parts at your truck, consider the source. This replacement PCM, part number 9354896, is the definitive fix for those hard-to-diagnose electronic gremlins. We take the guesswork and hassle out of the repair by professionally programming the module to your specific vehicle using your VIN. It arrives at your door with the latest GM software updates, ready for a straightforward installation.
A customer brought in his 2000 Sierra 1500 with a problem that was driving him crazy: it would randomly fail to start. Sometimes it was fine for weeks, then it would leave him stranded. The battery was new, the starter was good, and there were no consistent trouble codes. After checking all the primary circuits, I focused on the PCM. On these GMT800 trucks, the PCM is mounted under the battery tray, where it’s exposed to potential acid leaks and extreme temperatures. I’ve seen dozens fail from heat cycles and vibration alone. We swapped in a VIN-programmed PCM, performed the security relearn, and the truck fired up instantly. The intermittent no-start was gone for good. It’s a classic example of how a failing 1999-2000 Sierra 1500 PCM can create symptoms that seem unrelated to the computer itself.
Is Your Vehicle Showing These Symptoms?
- ✔ Engine cranks but refuses to start.
- ✔ Unexplained stalling, especially when warm or at idle.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ A noticeable drop in fuel economy (MPG).
- ✔ The check engine light is on with codes like P0601 (Internal Control Module Memory Check Sum Error), P0606 (PCM Processor Fault), or communication errors (U-codes).
- ✔ Misfire codes on multiple cylinders without a clear mechanical cause.
A Straightforward Guide to Installation
Replacing your 1999-2000 Sierra 1500 PCM is a job most DIYers can handle with basic tools. Our pre-programmed module makes it even simpler. Follow these general steps to get back on the road.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On most trucks and SUVs listed, the PCM is located on the driver’s side of the engine bay, underneath the battery and battery tray. You will need to remove both to gain access.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old PCM. These connectors have locking tabs; be gentle to avoid breaking them.
- Remove Old Module: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- Install New Module: Seat the new, pre-programmed PCM into the mounting bracket and secure it. Reconnect the wiring harnesses, ensuring they click securely into place.
- Reassemble: Reinstall the battery tray and the battery. Reconnect the negative battery terminal.
- Perform Security Relearn: You will need to perform a simple key-on/key-off procedure to sync the new PCM with your vehicle’s anti-theft system. This typically takes about 30 minutes and requires no special tools. We include instructions for this process with your order.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 9354896, 09354896, and 19109040. It is guaranteed to fit the following vehicles with the specified options:
- CAMARO: 1999-2002 (5.7L)
- CORVETTE: 1999-2000
- FIREBIRD: 1999-2002 (5.7L)
- SIERRA 1500 PICKUP: 1999-2000 (8 cylinder)
- SIERRA 2500 PICKUP: 1999-2000
- SILVERADO 1500 PICKUP: 1999-2000 (8 cylinder)
- SILVERADO 2500 PICKUP: 1999-2000
- SUBURBAN 1500 & 2500: 2000
- TAHOE: 2000 (Silverado style)
- YUKON: 2000 (exc. Denali)
- YUKON XL 1500 & 2500: 2000
How does the VIN programming work?
After your purchase, simply send us your vehicle’s 17-digit VIN. Our technicians will use it to load the exact, factory-correct software and the latest GM updates onto the module before shipping. This ensures it works perfectly with your truck’s specific engine, transmission, and options.
Do I need any special tools for installation?
No. Basic hand tools (socket set, screwdrivers) are all that’s required for the physical installation. The only other procedure is the security relearn, which just involves turning the key in a specific sequence for 30 minutes.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM (e.g., codes P0601, P0606), then yes, this part is the correct fix. It’s crucial to properly diagnose the issue first, as other failing sensors can also trigger a check engine light.
Is this a brand new part?
This is a high-quality, tested, and reliable replacement part that meets or exceeds original equipment specifications. Each unit is inspected and programmed by our experts to ensure dependable performance.
What is the security relearn procedure?
It’s a simple process to sync the new PCM to your vehicle’s anti-theft system. The general steps are: 1) Turn the key to ‘ON’ for 10 minutes, 2) Turn ‘OFF’ for 10 seconds, 3) Repeat this cycle two more times for a total of 30 minutes. The vehicle should then start. We provide detailed instructions with every order.