Is Your GM Truck or Van Suddenly Unreliable?
If you’re dealing with a 1999-2000 GMC 2500, or a similar GM vehicle from that era, you might be experiencing some frustrating issues. Maybe it’s a hard start or a no-start condition that came out of nowhere. Perhaps the engine is running rough, the transmission is shifting erratically, or the check engine light is on with a host of confusing codes. These aren’t just signs of age; they’re classic symptoms of a failing Powertrain Control Module (PCM).
As the central computer, the PCM is responsible for managing everything from fuel injection and ignition timing to transmission shift points. Over two decades of heat cycles, vibrations, and electrical stress can cause internal components, like capacitors and solder joints, to degrade and fail. This leads to the intermittent and unpredictable problems that make diagnosis a nightmare.
The Right Diagnosis is Half the Battle
In my 20+ years in the shop, I’ve seen countless hours and dollars wasted chasing ghosts. A customer will replace the fuel pump, ignition coils, and various sensors, only to have the same problem persist. The root cause? A faulty PCM sending incorrect signals or no signals at all. Before you replace another part, consider if the ‘brain’ of your vehicle is the real culprit.
Expert Pro Tip: Check Your Grounds First!
Before condemning any PCM on these GM trucks and vans, always perform a voltage drop test on the main power and ground circuits going to the module. I’ve personally seen dozens of vehicles where a corroded ground wire on the frame or engine block was causing voltage issues that mimicked a bad PCM. A 15-minute check with a multimeter can save you from replacing a perfectly good module. Clean, tight grounds are critical for these systems to function correctly.
The Simple, Reliable Solution: A Pre-Programmed PCM
This isn’t just a replacement part; it’s a complete solution. We take a quality, tested Powertrain Control Module and program it specifically to your vehicle’s Vehicle Identification Number (VIN). This crucial step ensures that all systems communicate perfectly, right out of the box. You get the latest GM software updates, which can resolve factory bugs and improve performance and efficiency.
- ✔ VIN-Programmed for Your Vehicle: No need for expensive dealer programming or special tools. It arrives ready for installation.
- ✔ Updated GM Software: We flash the module with the newest calibrations available from General Motors for your specific truck or van.
- ✔ Solves Common Issues: A direct fix for no-start conditions, rough idle, poor fuel economy, erratic shifting, and false diagnostic trouble codes (DTCs).
- ✔ Plug-and-Play Installation: Once installed, you will only need to perform the security relearn procedure, which is a simple process that does not require any special tools.
Guaranteed Fitment for Your Vehicle
This module is a direct replacement for several part numbers, ensuring broad compatibility across a wide range of GM vehicles. Please verify your original part number matches one of the following:
Replaces Part Numbers: 16263494, 16265035, 8162634940, 218-11787, 21811787
While this listing is for the 1999-2000 GMC 2500, this PCM fits dozens of other models, including the Chevrolet Silverado, Suburban, Tahoe, Express, GMC Sierra, Yukon, Savana, and more. Refer to the detailed fitment list to confirm it’s the right part for your specific application.