Is your 1999-2000 Silverado 1500 running rough, refusing to start, or throwing baffling check engine light codes? You’ve come to the right place. As a technician with over two decades of experience under the hood, I’ve seen countless truck owners replace perfectly good sensors and components, only to find the root cause was a failing Powertrain Control Module (PCM). This isn’t just a part; it’s the brain of your truck’s engine and transmission, and when it falters, it can cause a cascade of frustrating, hard-to-diagnose issues.
We offer a dependable and straightforward solution. This Powertrain Control Module, part number 9354896, is a direct-fit replacement for your vehicle. The best part? We handle the programming for you. Simply provide your vehicle’s VIN at checkout, and our experts will flash the module with the very latest GM factory software. This ensures perfect compatibility and function right out of the box, eliminating the need for an expensive trip to the dealership for programming. It’s the most efficient way to get your truck back to factory-spec performance and reliability.
From the Diagnostic Bay: The Intermittent No-Start Nightmare
I remember a 2000 Sierra 1500 (which uses the same platform as your Silverado) that came into my shop on a tow truck. The owner was at his wit’s end. It would start and run perfectly for a week, then suddenly refuse to start for a day. He’d already replaced the battery, starter, and crankshaft position sensor. The truck had no active trouble codes when it was running. After checking all the power and ground circuits to the PCM, I noticed the 5-volt reference signal to the sensors would intermittently drop out during cranking. This is a classic, textbook sign of an internal PCM failure. We installed a VIN-programmed module, performed the security relearn, and the truck fired up instantly. The customer called a month later to say it hadn’t missed a beat since. This simple swap saved him from more guesswork and wasted money.
Is Your Silverado Exhibiting These PCM Failure Signs?
A failing computer can manifest in many ways. If your truck is showing any of these symptoms, a faulty PCM is a very likely culprit. In my experience, internal module integrity codes are a dead giveaway.
- ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- ✔ Engine cranks but refuses to start, or starts and immediately stalls.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ A noticeable drop in fuel economy for no apparent reason.
- ✔ The engine misfires or runs rough, even after a spark plug and wire change.
- ✔ Intermittent electrical issues or warning lights that come and go.
- ✔ Failure to pass an emissions or smog test.
Your Straightforward Installation Guide
Replacing the PCM on these GM trucks is a job most DIYers can handle in their own driveway. On the 1999-2000 Silverado 1500, the PCM is located on the driver’s side frame rail, underneath the battery and its tray.
- Safety First: Disconnect the negative terminal from your truck’s battery.
- Access the Module: Remove the battery and the plastic battery tray to get a clear view of the PCM.
- Disconnect Connectors: Carefully unplug the electrical connectors from the old module. There are typically release tabs you’ll need to press or lift.
- Remove Old PCM: Unbolt the old PCM from its mounting bracket.
- Install New PCM: Mount your new, pre-programmed PCM and securely plug in all the electrical connectors.
- Reassemble: Reinstall the battery tray and the battery, then reconnect the negative battery terminal.
- CRITICAL STEP – Security Relearn: You MUST perform a security relearn procedure. Turn the key to the ‘ON’ position (don’t start) for 10-15 minutes, or until the ‘Security’ light on the dash stops flashing and turns off. Turn the key off for 10 seconds. Repeat this cycle two more times (for a total of three cycles). Your truck should now start and run with the new PCM.
Will This Fit My Vehicle?
We guarantee compatibility for the following vehicles, provided the part number matches. This unit is a direct replacement for part numbers 19109040, 09354896, and 9354896.
- ✔ 1999-2000 Chevrolet Silverado 1500 Pickup (8 Cylinder)
- ✔ 1999-2000 Chevrolet Silverado 2500 Pickup
- ✔ 1999-2000 GMC Sierra 1500 Pickup (8 Cylinder)
- ✔ 1999-2000 GMC Sierra 2500 Pickup
- ✔ 2000 Chevrolet Tahoe (Silverado Style)
- ✔ 2000 GMC Yukon (excluding Denali)
- ✔ 2000 Chevrolet Suburban 1500 & 2500
- ✔ 2000 GMC Yukon XL 1500 & 2500
- ✔ 1999-2002 Chevrolet Camaro (5.7L)
- ✔ 1999-2002 Pontiac Firebird (5.7L)
- ✔ 1999-2000 Chevrolet Corvette
Frequently Asked Questions
How do I provide my VIN number?
After completing your purchase, you will receive an email with instructions. Simply reply to that email with your 17-digit Vehicle Identification Number (VIN). We cannot ship the module until we receive your VIN.
Is the security relearn procedure really necessary?
Yes, absolutely. For these GM vehicles, the security system (Passlock/VATS) is tied to the PCM. If you do not perform the relearn procedure as described, the truck’s anti-theft system will prevent it from starting.
What if I have other modifications on my truck?
This PCM is programmed with standard GM factory software for a stock vehicle configuration. It is not designed for vehicles with significant engine or transmission modifications.
Will this fix my check engine light?
If the check engine light is caused by an internal PCM fault (like code P0601), this will resolve the issue. However, if the light is on due to a faulty sensor or other mechanical problem, you will still need to diagnose and repair that separate issue.
Is this a new or used part?
This is a high-quality, tested, and verified replacement part that is guaranteed to function to OEM specifications. We load it with fresh, VIN-matched GM software before shipping.