Is Your GM Truck or Van Running Rough?
If you’re dealing with frustrating issues like a persistent check engine light, poor fuel economy, erratic shifting, or even a no-start condition, the problem might be the very brain of your vehicle: the Powertrain Control Module (PCM). For a wide range of GM trucks and vans from 1998 to 2002, including the workhorse Chevy Express and GMC Savana, a failing PCM can bring your daily operations to a grinding halt. This isn’t just an inconvenience; it’s a critical failure that affects engine performance, transmission function, and overall reliability.
The Direct Solution: A VIN-Programmed Express 2500 Powertrain Control Module
Don’t let a faulty computer sideline your vehicle. This Powertrain Control Module is the definitive solution to get your truck or van back on the road, running as it should. We take the guesswork and hassle out of the replacement process. Unlike a generic module from a parts store or salvage yard, this unit is professionally flashed with the latest official GM software updates specifically for your vehicle. All we need is your Vehicle Identification Number (VIN) during checkout. This ensures that when the part arrives, it’s a true plug-and-play component, ready for installation without requiring an expensive trip to the dealership for programming.
From the Diagnostic Bay
We had a 2001 Chevy Express 2500 work van come in that was driving the owner crazy. It would randomly stall at stoplights, and the transmission would sometimes refuse to shift out of second gear. We scanned it and got a slew of communication error codes. After checking the wiring harness and grounds, we pinpointed the PCM. Instead of a costly dealer part, the owner opted for one of our pre-programmed units. After a straightforward 20-minute swap and a quick security relearn, the van ran perfectly. No more stalling, crisp shifts, and a happy customer back on the job. These modules are the lifeblood of these vehicles.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light is illuminated with various trouble codes.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ A significant drop in fuel mileage.
- ✔ The vehicle cranks but refuses to start (no-start condition).
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
Why Choose a Pre-Programmed Module?
Replacing a PCM isn’t just a matter of swapping boxes. The module must be programmed to communicate with your vehicle’s specific options, engine, transmission, and security system (Passlock/VATS). Our service handles this critical step for you. By flashing the module with your VIN, we ensure it has the correct calibration files and the most recent software from GM, which often corrects factory bugs and improves performance and longevity. This is the most reliable and efficient way to replace a faulty Express 2500 Powertrain Control Module and restore your vehicle’s factory performance.
This module is a direct replacement for multiple part numbers, including 16263494, 16265035, and 8162634940. It fits an extensive list of popular GM vehicles such as the Chevrolet Silverado, GMC Sierra, Tahoe, Yukon, S10, Blazer, and more. Please verify your part number and consult the detailed fitment list to ensure compatibility. Upon purchase, simply provide your VIN, and we’ll handle the rest, shipping you a module that’s ready to restore your vehicle’s health.
Frequently Asked Questions
Do I need to do any programming after I receive this module?
No. We program the module with the latest GM software using the VIN you provide. In most cases, it is a plug-and-play installation. However, some GM vehicles of this era may require a simple security relearn procedure, which can be done without special tools and typically takes 10-30 minutes. Instructions are readily available online for this process.
Where do I provide my VIN?
You can add your 17-digit VIN to the notes section during checkout or send it to us in a message after placing your order. We cannot ship the module until we have your VIN to program it correctly.
Is this a new or used part?
This is a high-quality, tested component that has been verified for full functionality. It is then loaded with fresh, vehicle-specific software for your VIN, ensuring reliable performance.
How do I know if my old PCM is actually bad?
While the symptoms listed are strong indicators, it’s always best to have a qualified mechanic perform a full diagnostic. This includes checking power and ground circuits to the module and ruling out other potential causes like faulty sensors or wiring issues before replacing the PCM.
Will this fix my transmission shifting problems?
The PCM controls both the engine and the transmission. If your shifting issues are caused by faulty electronic commands from a failing module, then yes, this part is very likely to solve the problem. However, it will not fix internal mechanical failures within the transmission itself.