Restore Peak Performance to Your GM Truck or Van
Is your Chevrolet Express, GMC Savana, or GM pickup running rough, stalling, or showing a persistent check engine light? The Powertrain Control Module (PCM) is the central computer of your vehicle, managing everything from fuel mixture and ignition timing to transmission shifting. When it fails, it can cause a wide range of frustrating and difficult-to-diagnose issues. This direct-fit replacement PCM, part number 16265035, is the definitive solution to get your vehicle operating reliably again.
Unlike sourcing a part from a junkyard, this module comes fully programmed to your specific vehicle. Upon purchase, simply provide us with your Vehicle Identification Number (VIN), and our technicians will flash the unit with the latest official GM software updates. This ensures perfect compatibility and function right out of the box, eliminating the need for an expensive trip to the dealership for programming. It’s a true plug-and-play solution designed for both professional mechanics and savvy DIYers.
I once had a 2001 Chevy Express 2500 in the shop with an intermittent no-start condition that was driving the owner crazy. It would run fine for days, then refuse to start for an hour. We checked the fuel pump, crank sensor, and ignition system—all tested good. After hours of tracing wires, we finally suspected the PCM. We swapped in a pre-programmed unit like this one, and the problem vanished instantly. The internal circuitry of the original module was failing intermittently when it got warm, a classic sign of PCM failure that a simple code scan doesn’t always catch.
Diagnosing and Replacing Your 1999-2002 Savana 2500 PCM
A failing PCM can mimic many other component failures, making diagnosis tricky. However, certain symptoms point directly to the vehicle’s main computer. If you’re experiencing multiple, seemingly unrelated electronic or performance issues, the PCM should be a primary suspect. Replacing a faulty 1999-2002 Savana 2500 PCM is often the most effective way to resolve these complex problems and restore the vehicle’s original drivability and fuel efficiency.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various communication or sensor codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ A sudden, unexplained drop in fuel economy.
- ✔ Complete no-start or intermittent starting issues.
- ✔ Failure to pass emissions testing.
This module is a direct replacement for multiple GM part numbers, including 16263494, 16265035, and 8162634940. It fits an extensive list of popular GM vehicles from the era, such as the Chevrolet Silverado, GMC Sierra, Tahoe, Yukon, S10 Blazer, and more. Please verify the part number and check the detailed fitment list to ensure compatibility with your specific model and year.
Frequently Asked Questions
Do I need to program this module?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during or after checkout, and the module will arrive with the latest GM software, ready for installation.
What is a VIN and where do I find it?
The VIN is your vehicle’s unique 17-digit identification number. You can typically find it on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this fix my vehicle’s specific problem?
If your vehicle’s issues are caused by a faulty PCM, this part is the correct solution. However, since symptoms can overlap with other failing components (like sensors or wiring), we always recommend a proper diagnosis by a qualified mechanic if you are uncertain.
Is any additional setup required after installation?
In many cases, it is a simple plug-and-play installation. However, some GM vehicles of this era may require a security relearn procedure (also known as a CASE relearn) to sync the new PCM with your vehicle’s anti-theft system. This is a simple procedure that can typically be done without special tools and instructions are widely available online.
Is this compatible with my Chevy S10 or GMC Jimmy?
Yes, this PCM is compatible with a wide range of GM trucks and SUVs from the 1998-2002 model years, including the S10, Sonoma, Blazer, and Jimmy, particularly those with the 4.3L V6 engine. Always cross-reference your original part number to confirm fitment.