Restore Your Truck’s Heartbeat and Drive with Confidence
Is your truck suffering from baffling electrical gremlins, poor performance, or a persistent check engine light? A failing Powertrain Control Module (PCM) can feel like a complex, frustrating problem, leaving you stranded and uncertain. This replacement PCM, part number 9354896, is the definitive solution to get your vehicle running like it just rolled off the factory floor. We take the guesswork and dealer-level expense out of the equation. By programming this module to your vehicle’s specific VIN before it ships, we deliver a component that’s ready for a straightforward installation, restoring the crisp response and reliable operation you depend on.
Warning Signs and How to Overcome Them
If your vehicle is experiencing any of the following, a failing computer could be the culprit. This module is designed to resolve these exact issues:
- ✔ Erratic Shifting or Transmission Issues: Solves harsh shifts, slipping, or failure to shift, which are often misdiagnosed as mechanical transmission failure.
- ✔ Check Engine Light with Specific Codes: Directly addresses communication error codes like P0601 (Internal Control Module Memory Check Sum Error) and P0606 (ECM/PCM Processor Fault).
- ✔ Poor Engine Performance: Eliminates problems like rough idling, stalling, hesitation, and a noticeable drop in fuel economy.
- ✔ Complete No-Start Condition: Restores function when the original PCM fails to control the fuel or ignition systems, leaving you with a truck that cranks but won’t start.
- ✔ Intermittent Electrical Problems: Corrects bizarre issues with gauges, lights, or other electronic components that seem to have no other cause.
From the Technician’s Bench
“I once had a customer with a 2000 Silverado 2500 who had already spent a fortune chasing what he thought was a bad transmission. It would shift hard from first to second and sometimes get stuck in gear. He replaced solenoids, serviced the fluid—nothing worked. The real issue was the PCM sending faulty signals. We installed a VIN-programmed module just like this one, performed the quick security relearn, and the truck shifted perfectly. It’s a powerful reminder that the ‘brain’ dictates everything, and starting with a healthy one saves a world of time, money, and frustration.”
Guided Installation for a Confident Fix
Replacing your 1999-2000 Sierra 2500 PCM is a manageable job for a DIYer with basic tools. Follow these steps to get back on the road quickly.
- Safety First: Always disconnect the negative terminal of your vehicle’s battery and wait at least 10 minutes to ensure the system is fully discharged.
- Locate the Old Module: On your Sierra or Silverado, the PCM is typically found on the driver’s side of the engine bay, located in a black plastic bracket underneath the battery tray. You will need to remove the battery to access it.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New PCM: Place your new, pre-programmed PCM into the mounting bracket and secure it. Reconnect the wiring harnesses, ensuring they click firmly into place.
- Reassemble and Reconnect: Reinstall the battery and its tray. Reconnect the negative battery terminal.
- Perform Security Relearn: Your vehicle may require a simple security relearn procedure to recognize the new module. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating a couple of times before starting the engine. This allows the anti-theft system to sync with the new PCM.
Tailored Fit for Your Ride
This module is a direct replacement for part number 9354896 and is guaranteed to fit the following vehicles. Please ensure your make, model, and year match the list below.
- 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
By providing your VIN upon purchase, you ensure this 1999-2000 Sierra 2500 PCM is loaded with the precise software your vehicle needs for optimal performance and functionality, straight out of the box.
Frequently Asked Questions
What exactly does ‘programmed to my VIN’ mean?
It means we use your vehicle’s unique 17-digit Vehicle Identification Number (VIN) to load the exact factory software and the latest GM updates onto the module. This ensures it communicates perfectly with your truck’s engine, transmission, and other systems, just like the original part did.
Will I need to do anything after I install it?
In most cases, you will need to perform a simple ‘security relearn’ or ‘CASE relearn’ procedure. This syncs the new PCM with your vehicle’s anti-theft system and crankshaft position sensor. It’s a key-on/key-off process that you can do yourself in your driveway—no special tools are required.
Is this a job I can do myself?
Absolutely. If you’re comfortable with basic hand tools and can disconnect a car battery, you can replace this module. Our pre-programming service eliminates the most difficult step, which would otherwise require a trip to a dealership or specialized shop.
How can I be sure my old PCM is the problem?
While a professional diagnosis is always best, common signs of a failing PCM include a no-start condition where the engine cranks but won’t fire, persistent communication-related check engine codes (like P0601), and bizarre transmission or electrical issues that other repairs haven’t fixed.
Will this fix my check engine light?
If the check engine light is on due to an internal fault in the original PCM (like the codes mentioned above), then yes, this part is designed to correct that issue. However, if the light is on for another reason, such as a bad sensor, that separate issue will still need to be addressed.
Where is the PCM located on my 1999-2000 Sierra 2500?
The PCM is located in the engine compartment on the driver’s side (LH side). You’ll find it mounted in a bracket, typically right underneath the battery tray. You will need to remove the battery to gain access for the replacement.