Restore Peak Performance to Your GM Truck or Van
Is your Chevrolet, GMC, or Isuzu suffering from erratic behavior, poor fuel economy, or a persistent check engine light? The Powertrain Control Module (PCM), the brain of your vehicle’s engine and transmission, is often the culprit. This replacement PCM, compatible with service number 16263494, is the definitive solution to restore your vehicle’s factory performance and reliability. We take the guesswork and high dealership costs out of the equation by pre-programming the module specifically to your vehicle’s VIN before it ships.
I remember a 1999 Silverado that came into the shop with a transmission that was shifting hard and erratically. The owner had already replaced the transmission fluid, filter, and two different shift solenoids based on forum advice, spending hundreds of dollars with no improvement. After hooking up our scanner, we saw no communication from the PCM to the transmission control circuits. A quick check of the wiring confirmed our suspicion: the PCM itself had failed internally. We installed a VIN-programmed module, performed the security relearn, and the truck shifted like it just rolled off the assembly line. It’s a classic case of treating the cause, not just the symptoms.
Is Your Vehicle Showing These Symptoms?
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Rough or unstable idling.
- ✔ Unexplained drops in fuel efficiency.
- ✔ Harsh or delayed automatic transmission shifting.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
- ✔ Failure to pass state emissions testing.
The Superior Solution: A Pre-Programmed GM 16263494 PCM
Replacing a PCM isn’t just about swapping hardware. A blank module won’t work. Dealerships charge a premium for the part and then add several hours of labor for programming. Our solution provides a fully functional, ready-to-install module. When you provide us with your VIN, our technicians flash the unit with the latest, most stable software updates directly from GM. This ensures all factory parameters for your specific engine, transmission, and emissions equipment are perfectly loaded, often correcting issues the original software may have had.
This module is a direct replacement for a wide range of popular GM trucks and vans from the late 1990s and early 2000s, including the S10, Blazer, Silverado, Sierra, Tahoe, Yukon, Express, and Savana. By matching part number 16263494 or one of its interchanges like 16265035, you guarantee a perfect fit. Our programming service makes this a straightforward repair for the seasoned DIYer or professional mechanic.
Installation Note
After installing your new PCM, you may need to perform a security relearn procedure (often called Passlock or CASE relearn). This simple process syncs the new module with your vehicle’s anti-theft system and crankshaft position sensor. This procedure can typically be done without special tools and instructions are widely available online for your specific model.
Frequently Asked Questions
Do I need to get this module programmed by a dealer?
No. We handle all the programming for you before we ship the part. Simply provide your vehicle’s VIN during or after checkout, and it will arrive ready for installation.
Where can I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your driver’s side 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 specific problem, like a transmission shifting issue?
If the PCM is the root cause of the problem, yes, this will be the correct fix. A faulty PCM can cause a wide range of engine and transmission symptoms. However, proper vehicle diagnosis is always recommended to ensure you are replacing the correct part.
What is a security or CASE relearn?
It’s a procedure that syncs the new computer with your vehicle’s security system and sensors. For most of these GM vehicles, it involves a sequence of turning the key on and off. This is a necessary final step after installation.
How do I ensure this is the right part for my truck?
The best way is to match the service number (e.g., 16263494) from your original module. You can also use the detailed fitment list on this page. Providing us your VIN guarantees we will program it correctly for your exact vehicle configuration.