Get Your Hard-Working Truck or Van Back on the Road
Is your reliable GM truck or van suddenly stalling, refusing to start, or throwing confusing check engine lights? A failing Powertrain Control Module (PCM) can bring any job to a grinding halt, causing immense frustration and costing you valuable time. This isn’t just an inconvenience; it’s a critical failure that sidelines your workhorse. We offer the definitive, hassle-free solution: a dependable, used OEM engine computer, professionally programmed to your vehicle’s specific VIN, ready to get you moving again.
Common Symptoms & Your Solution
A faulty PCM can manifest in various ways, often mimicking other sensor or component failures. If you’re experiencing issues like harsh shifting, poor fuel economy, a no-start condition where the engine cranks but won’t fire, or communication error codes, the computer is a likely culprit. Diagnostic Trouble Codes (DTCs) such as P0601 (Internal Control Module Memory Check Sum Error) or other P06xx codes are a clear sign. This module is the solution, arriving ready to install and resolve these frustrating electronic gremlins.
- ✔ Plug & Play Installation: This unit is professionally flashed with the latest GM software updates using your vehicle’s VIN. This critical step means you can install it yourself without needing an expensive trip to the dealership for programming.
- ✔ Restored Drivability: By correcting engine and transmission control signals, this PCM restores the smooth performance, reliable starting, and proper shifting you depend on.
- ✔ Cost-Effective Repair: Get the proven reliability of an original equipment part without the high cost of a new unit. This is a smart, practical fix for your vehicle.
- ✔ Guaranteed Compatibility: We program the module to match your exact vehicle configuration, ensuring seamless communication with all other onboard systems.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty. Drive with confidence knowing you’re covered.
An Expert’s Note on 90s GM Electronics
The PCMs in these late-90s GM trucks and vans are the heart and brain of the entire vehicle. Unlike older, simpler systems, they control everything from fuel mixture and spark timing to transmission shift points and anti-theft systems (Passlock/VATS). That’s why simply swapping a used computer from another vehicle will almost never work—the VIN mismatch will prevent the engine from starting. Our VIN programming service isn’t just a convenience; it’s an essential requirement to make the part function correctly in your specific truck, saving you from a world of diagnostic headaches.
By purchasing this Programmed 1999 Chevy Express 3500 PCM, you are not just buying a part; you are buying a complete solution. We handle the complex programming so you can focus on the straightforward installation. Simply provide your VIN during checkout, and we’ll ship a module that is ready to restore your vehicle’s health and reliability.
Frequently Asked Questions
What exactly is a PCM?
The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is your vehicle’s main computer. It controls all aspects of the engine and transmission to ensure optimal performance, fuel efficiency, and emissions.
How do I provide my VIN number?
After you complete your purchase, you will need to send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as the programming is specific to your vehicle.
Will I need to do any additional programming after installation?
No. This PCM comes fully programmed to your VIN and is ready for installation. In most cases, no further procedures are needed. However, some vehicles may require a simple security relearn procedure, which can be done without any special tools and takes about 30 minutes. We can provide instructions for this if needed.
How can I be sure my original PCM is the problem?
While symptoms like no-start, erratic behavior, and specific trouble codes (like P0601) strongly point to a faulty PCM, it’s always best to have a qualified mechanic perform a full vehicle diagnosis. This ensures you are replacing the correct part and avoids unnecessary expenses.
What does the one-year replacement warranty cover?
This unit is backed by our one-year replacement warranty. This covers the module itself against failure for one year from the date of purchase. If the unit fails within this period, we will provide a replacement part.
How do I confirm this fits my vehicle?
Please check the extensive compatibility list on this page. The most important step is to match the service number from your original computer to one of the part numbers listed (e.g., 16258815, 09355699). If you are unsure, please contact us with your VIN before ordering.