Is Your 1999-2000 GM Truck or SUV Acting Erratically?
As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing Powertrain Control Module (PCM) can turn a reliable truck into a source of constant frustration. For vehicles like the 1999-2000 Sierra 1500, Silverado, Tahoe, and Yukon, the PCM is the central brain. When it starts to fail, the symptoms can be confusing and often misdiagnosed, costing you time and money on parts you don’t need.
These early GMT800 platform vehicles are workhorses, but their electronics are now over 20 years old. The PCM, typically located under the battery tray, is subjected to constant vibration and extreme temperature swings. Over time, this leads to internal solder joint fractures and component failure on the circuit board, causing a cascade of problems.
Common Symptoms of a Failing GM PCM
If you’re experiencing any of the following, a faulty PCM is a very likely culprit. I’ve personally traced these exact issues back to the PCM on hundreds of GM trucks and SUVs in my shop:
- ✔ No-Start or Intermittent Starting: The engine cranks but won’t fire up, or only starts when it feels like it.
- ✔ Harsh or Erratic Shifting: Your transmission may slam into gear, hesitate, or get stuck in one gear (limp mode).
- ✔ Check Engine Light with Communication Codes: You might see codes like U0100 (Lost Communication with ECM/PCM) that a standard scan tool can’t clear.
- ✔ Poor Fuel Economy and Performance: The engine may run rough, hesitate on acceleration, or burn through fuel faster than usual.
- ✔ Stalling for No Reason: The vehicle dies while driving or idling, often without warning.
- ✔ Inaccurate Gauge Readings or Warning Lights: The dashboard lights up with random warnings that don’t make sense.
Expert Pro Tip: Check Your Grounds First!
Before you condemn your PCM, do yourself a favor and check the main ground connections. On these GM trucks, there’s a critical ground wire from the battery to the engine block and another to the chassis. I’ve seen corroded or loose grounds mimic a bad PCM perfectly. A few minutes with a wire brush can save you a big headache. If your grounds are clean and tight and the problems persist, the PCM is your next logical step.
The Direct-Fit, Programmed Solution
This isn’t just a replacement part; it’s a complete solution. We take a quality, tested Powertrain Control Module and flash it with the latest, most stable software release from General Motors, specifically for your vehicle. This is a critical step that dealerships charge a premium for.
How it Works: After you place your order, simply provide us with your vehicle’s 17-digit VIN. Our technicians will use this to access the correct GM calibration files. This ensures that everything from your engine’s fuel maps and transmission’s shift strategy to your vehicle’s anti-theft system (VATS/Passlock) functions exactly as it should from the factory. The module arrives at your door ready for a straightforward installation.
Why VIN Programming is Essential
- ✔ Guaranteed Compatibility: Flashing with your VIN ensures the PCM is a perfect match for your truck’s specific options and systems.
- ✔ Plug & Play Installation: No need for an expensive trip to the dealer for programming. In most cases, you can install this yourself with basic hand tools.
- ✔ Latest GM Software Updates: We install the newest software, which often contains fixes for common drivability issues that were present in the original programming.
- ✔ Resolves Anti-Theft Issues: A non-programmed module will trigger the anti-theft system and prevent the vehicle from starting. Our service handles this for you.
Guaranteed Fitment for Part Number 09354896
This module is a direct replacement for service numbers 09354896, 9354896, and 19109040. It is compatible with a wide range of GM vehicles. Please verify your part number and match it to the list below.
Trucks & SUVs (Module located under the battery)
- ✔ 1999-2000 GMC Sierra 1500 / 2500 (8 cylinder)
- ✔ 1999-2000 Chevrolet Silverado 1500 / 2500 (8 cylinder)
- ✔ 2000 Chevrolet Tahoe (Silverado Style)
- ✔ 2000 GMC Yukon / Yukon XL 1500 / Yukon XL 2500
- ✔ 2000 Chevrolet Suburban 1500 / 2500
Cars (Module located behind RH strut tower)
- ✔ 1999-2002 Chevrolet Camaro (5.7L)
- ✔ 1999-2002 Pontiac Firebird (5.7L)
- ✔ 1999-2000 Chevrolet Corvette
Don’t let a faulty computer keep your vehicle off the road. Restore its performance and reliability with a professionally programmed PCM built to last. Order today and get your truck, SUV, or car running right again.