Is Your Silverado’s Brain on the Fritz?
If your 1999 or 2000 Silverado 2500 is suddenly acting possessed – maybe it’s stalling at stoplights, shifting erratically, or refusing to start altogether – the problem might be deeper than a simple sensor. The Powertrain Control Module, or PCM, is the central computer for your engine and transmission. When it starts to fail, it can cause a cascade of confusing and frustrating issues that can leave even seasoned DIYers scratching their heads.
Real-World Diagnosis: From the Shop Floor to Your Driveway
Over my 20+ years turning wrenches, I’ve seen hundreds of these specific GM PCMs fail. They’re typically located in a tough spot: on the driver’s side, right under the battery tray. This location exposes them to years of intense heat cycles from the engine and vibration from the road. Worse, a leaking battery can drip acid directly onto the module and its wiring, causing corrosion that leads to intermittent connections and eventual failure.
A Mechanic’s Story
A customer’s 2000 Silverado 2500 came in last week with these exact symptoms. It had a check engine light on with a U0100 ‘Lost Communication with ECM/PCM’ code. The truck would crank but wouldn’t start consistently. We checked all the power and ground wires at the PCM connectors, and they were perfect. This told us the problem wasn’t the wiring, but an internal fault within the module itself. After replacing the PCM with a correctly programmed unit, the truck fired right up and ran smoother than it had in years. This is a textbook failure for these vehicles.
Common Symptoms of a Failing 9354896 PCM:
If you’re experiencing any of the following, your PCM is the likely culprit:
- ✔ Check Engine Light is on, especially with communication-related trouble codes (U-codes).
- ✔ The engine cranks but refuses to start, or starts and immediately stalls.
- ✔ Unexplained drops in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The engine runs rough, misfires, or hesitates under acceleration.
- ✔ Your scan tool cannot communicate with the vehicle’s computer.
The Direct-Fit, Programmed Solution
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a fully tested, reliable Powertrain Control Module and flash it with the latest official GM software updates specifically for your truck. This is a critical step that dealerships charge a premium for.
How it works:
- You purchase this module.
- You provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN).
- Our technicians use your VIN to load the exact factory calibration for your truck’s specific configuration (engine, transmission, emissions, etc.).
- We ship you a plug-and-play module. No expensive trips to the dealer for programming.
Guaranteed Compatibility
This module is the correct replacement for units bearing part numbers 9354896, 09354896, or 19109040. It is guaranteed to fit and function correctly in the following vehicles:
- ✔ 1999-2000 Chevrolet Silverado 2500 Pickup (located LH front under battery)
- ✔ 1999-2000 GMC Sierra 2500 Pickup (located LH front under battery)
- ✔ 1999-2000 Chevrolet Silverado 1500 Pickup (8 cylinder)
- ✔ 1999-2000 GMC Sierra 1500 Pickup (8 cylinder)
- ✔ 2000 Chevrolet Tahoe (Silverado style, located LH front below battery)
- ✔ 2000 Chevrolet Suburban 1500 / 2500
- ✔ 2000 GMC Yukon (exc. Denali)
- ✔ 2000 GMC Yukon XL 1500 / 2500
- ✔ 1999-2002 Chevrolet Camaro (5.7L)
- ✔ 1999-2002 Pontiac Firebird (5.7L)
- ✔ 1999-2000 Chevrolet Corvette
Don’t let a faulty computer keep your reliable GM truck or car off the road. This is the straightforward, professional-grade fix you need to restore your vehicle’s performance and dependability.