Is Your Truck’s Brain on the Fritz?
If your 1999-2000 Silverado 2500 is suddenly acting possessed—stalling at stoplights, shifting erratically, or refusing to start altogether—the problem might not be a simple sensor or a bad fuel pump. These are classic signs that the very brain of your vehicle, the Powertrain Control Module (PCM), is beginning to fail. As a technician with over two decades of experience under the hood, I’ve seen how a faulty PCM can send even the most seasoned mechanics on a wild goose chase, replacing part after part with no success.
The PCM is the master computer for your engine and transmission. It processes thousands of signals every second to manage everything from fuel injection and ignition timing to transmission shift points and emissions controls. Located under the battery tray on these trucks, it’s subjected to years of intense heat, vibration, and potential moisture intrusion, which can lead to internal circuit board failure.
A Technician’s Real-World Experience
“A customer’s 2000 Silverado 2500 came in last week with these exact symptoms. The owner had already replaced the alternator and battery trying to solve an intermittent no-start and stalling issue. His scanner showed a dozen random communication codes that made no sense together. After confirming power and ground to the PCM, we knew where to look. The original module was failing internally, corrupting data across the network. Installing a correctly programmed PCM didn’t just fix the problem; it restored the truck’s crisp throttle response and smooth shifting, making it drive like new again.”
Common Symptoms of a Failing GM PCM
A failing PCM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, your module is a likely suspect:
- ✔ Unexplained Check Engine Light (CEL) that may come and go.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Harsh, erratic, or delayed transmission shifting.
- ✔ Complete no-start condition where the engine cranks but won’t fire up.
- ✔ Poor fuel economy and a noticeable loss of power.
- ✔ Communication error codes with your scan tool (U-codes).
- ✔ Problems with the anti-theft system (VATS/Passlock) preventing the engine from starting.
The Solution: A Plug-and-Play Replacement, Programmed for You
This isn’t just a replacement part; it’s a complete solution. We take a quality-tested Powertrain Control Module and professionally program it with the latest GM-certified software updates specifically for your truck. All you have to do is provide us with your vehicle’s 17-digit VIN during checkout. This critical step ensures that the PCM is a perfect match for your vehicle’s specific configuration, including:
- ✔ Engine and transmission calibration.
- ✔ Axle ratio and tire size parameters.
- ✔ Vehicle Anti-Theft System (VATS) programming.
- ✔ All factory options your truck was built with.
By handling the programming beforehand, we eliminate the need for an expensive trip to the dealership. This module arrives at your door ready for a straightforward installation. Simply disconnect the battery, swap the modules, reconnect the battery, and you’re ready to go. In most cases, no additional procedures are required.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for part numbers 09354896, 9354896, and 19109040. It is guaranteed to fit the following vehicles:
- ✔ 1999-2000 Chevrolet Silverado 1500/2500 & GMC Sierra 1500/2500: (Located LH front under battery)
- ✔ 2000 Chevrolet Tahoe & GMC Yukon/Yukon XL 1500/2500: (Located LH front under battery)
- ✔ 2000 Chevrolet Suburban 1500/2500: (Located LH front under battery)
- ✔ 1999-2002 Chevrolet Camaro & Pontiac Firebird (5.7L): (Located behind RH strut tower)
- ✔ 1999-2000 Chevrolet Corvette: (Located RH engine compartment)
Don’t let a failing computer keep your reliable GM truck or car off the road. Restore its performance and dependability today with a professionally programmed, ready-to-install Powertrain Control Module.