Is Your 1999-2000 GM Truck Running Rough? The PCM Might Be the Culprit.
As a technician with over two decades of experience under the hood, I’ve seen it all when it comes to the GMT800 platform trucks like your Silverado, Sierra, or Tahoe. One of the most common, and often misdiagnosed, issues I encounter is a failing Powertrain Control Module (PCM). Your truck might be stalling for no reason, shifting erratically, or refusing to start altogether. You might have a dashboard lit up like a Christmas tree with seemingly unrelated check engine light codes. These aren’t just random glitches; they’re classic signs that your vehicle’s brain is on the fritz.
A Real-World Scenario from My Shop
“A customer’s 2000 Silverado 1500 came in on a tow truck last month. It would crank but not start, and when it did run, it shifted hard into second gear and threw codes for the throttle position sensor, an O2 sensor, and a transmission solenoidโall at once. The owner had already replaced the sensors with no luck. I went straight for the PCM, located under the battery tray. Sure enough, years of battery acid fumes and moisture had corroded the case and compromised the internal circuits. We installed one of our VIN-programmed PCMs, performed the security relearn, and the truck fired right up and drove perfectly. It wasn’t a handful of bad parts; it was one single point of failure.”
The Direct Solution: A VIN-Programmed PCM
Don’t waste time and money chasing phantom electrical gremlins or replacing perfectly good sensors. This Powertrain Control Module is the reliable, direct-fit solution for your vehicle. What makes our service different is that we take the guesswork and the expensive dealership trip out of the equation. Before we ship it, we flash the module with the latest official GM software calibration specifically for your truck, using the Vehicle Identification Number (VIN) you provide at checkout. This ensures that when you receive the part, it’s ready to communicate with your specific engine, transmission, and emissions equipment.
Why VIN Programming is Essential
A PCM isn’t a simple plug-and-play part like an alternator. It contains complex software that manages everything from fuel injection and spark timing to transmission shift points and anti-theft systems. Without the correct programming, your vehicle simply will not run correctly, if at all.
- โ Eliminates Mismatches: Ensures the PCM is calibrated for your truck’s specific options (engine size, transmission type, gear ratio).
- โ Saves You Money: You avoid towing your vehicle to a dealership and paying their high labor rates for programming.
- โ Provides Latest Updates: We load the most current GM software, which often includes fixes for known drivability issues, improving performance and reliability over the original software.
- โ Simplifies Installation: While a security relearn procedure is typically required (a simple process you can do yourself), the core operational programming is already done.
Confirm Your Part Number
This module is a direct replacement for several original GM part numbers. Please verify that your existing module has one of the following numbers printed on its label to ensure a perfect match:
- โ 19109040
- โ 09354896
- โ 9354896
Guaranteed Fitment for Your GM Vehicle
We guarantee this computer will fit and function correctly in the following vehicles, provided the part number on your original module matches. Please check the specific notes for your model.
- โ 1999-2000 Chevrolet Silverado 1500 / 2500 (8 Cylinder) – Located LH front under battery
- โ 1999-2000 GMC Sierra 1500 / 2500 (8 Cylinder) – Located LH front under battery
- โ 2000 Chevrolet Tahoe (Silverado style) – Located LH front below battery
- โ 2000 GMC Yukon / Yukon XL 1500 / Yukon XL 2500 – Located LH front under battery
- โ 2000 Chevrolet Suburban 1500 / 2500 – Located LH front under battery
- โ 1999-2000 Chevrolet Corvette – Located in RH engine compartment
- โ 1999-2002 Chevrolet Camaro (5.7L) – Located behind RH strut tower
- โ 1999-2002 Pontiac Firebird (5.7L) – Located behind RH strut tower
IMPORTANT: After purchasing, please send us your vehicle’s 17-digit VIN. We cannot ship your order until we have this information to program the module correctly.