Restore Your GM Truck’s Brain and Get Back on the Road
Is your Chevrolet Express, Silverado, or GMC Sierra running rough, stalling unexpectedly, or throwing frustrating check engine light codes? A failing Powertrain Control Module (PCM) is often the culprit, acting like a broken brain for your vehicle’s engine and transmission. This isn’t just an inconvenienceโit’s a problem that can sideline your workhorse indefinitely. This replacement PCM is the definitive, hassle-free solution to restore your vehicle’s performance and reliability.
We take the guesswork and expensive dealership trips out of the equation. Before this module ships, we program it specifically to your vehicle’s VIN using the latest official GM software updates. This ensures that when it arrives, it’s a true plug-and-play component, ready to get your truck or van running smoothly again. Stop chasing symptoms and replace the core of the problem with a reliable, correctly programmed 1999-2002 Express 2500 PCM.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a failing PCM is the likely cause:
- Poor or erratic automatic transmission shifting
- Engine stalling, stumbling, or rough idling
- Noticeable decrease in fuel economy
- Vehicle won’t start, or starts and immediately dies
- Check Engine Light with codes like P0601, P0602, P0605, or other communication errors
This module is engineered to resolve these issues, restoring the precise fuel delivery, spark timing, and transmission control your vehicle had when it was new.
Features & Benefits
- โ๏ธ VIN-Specific Programming: We flash the module with your vehicle’s exact VIN and the latest GM software, ensuring perfect compatibility and performance right out of the box.
- โ๏ธ Plug & Play Installation: No expensive trips to the dealer for programming. Once you receive the module, installation is straightforward, saving you significant time and money.
- โ๏ธ Restores Peak Performance: Eliminates frustrating drivability issues caused by a faulty computer, bringing back the smooth and reliable operation you depend on.
- โ๏ธ Broad Compatibility: A direct replacement for multiple part numbers, including 16263494, 16265035, 8162634940, and more, covering a wide range of essential GM trucks and vans.
- โ๏ธ Thoroughly Inspected: Each module is carefully inspected to guarantee reliability and long-term durability for your vehicle.
An Expert’s Insight: As a technician, I’ve seen countless work vans and trucks from this era sidelined by a bad computer. The owner often fears the transmission is failing or they need a new engine. More often than not, the root cause is the original PCM. Swapping in a pre-programmed unit like this one is one of the most satisfying repairsโthe difference is night and day. You aren’t just replacing a part; you’re restoring the vehicle’s central nervous system and bringing that dependable GM powertrain back to life. This is the correct fix for a reliable 1999-2002 Express 2500 PCM and many other models.
After purchase, simply provide us with your VIN, and we’ll handle the programming. This ensures that the 1999-2002 Express 2500 PCM you receive is tailored perfectly for your vehicle, making the repair process as simple as possible.
Frequently Asked Questions
What information do you need from me after I order?
We need your 17-digit Vehicle Identification Number (VIN) to program the module correctly. You can typically find your VIN on your vehicle’s dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is any additional programming required after I install it?
No, the module arrives fully programmed for engine and transmission functions. However, on many GM vehicles, you may need to perform a simple Security Relearn Procedure, which can be done without special tools and typically takes 10-30 minutes. We can provide instructions for this process.
Do I need to send my old PCM (core) back?
No core charge or core return is required for this part. You can keep or responsibly dispose of your old module.
How can I be sure my PCM is the problem?
While the symptoms listed are strong indicators, it’s always best to have a proper diagnosis performed. Common signs include specific diagnostic codes (like P0601: Internal Control Module Memory Check Sum Error), multiple unrelated error codes appearing at once, or having ruled out all other potential causes like sensors or wiring issues.
Where is the PCM located on my vehicle?
The location varies by model. On many GM trucks and vans from this era, you’ll find it in the engine compartment, often on the driver’s side fender, near the battery, or mounted to the firewall.