Restore Peak Performance to Your GM Truck or Van
Is your 1999-2000 GMC Yukon, Chevy Tahoe, or other GM vehicle experiencing frustrating issues like a persistent check engine light, erratic shifting, stalling, or a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM). As the central computer for your engine and transmission, a faulty PCM can cause a wide range of problems that are often misdiagnosed, leading to costly and unnecessary repairs. This replacement PCM, part number 16265035, is the direct-fit, reliable solution to get your vehicle running smoothly again.
From the Diagnostic Bay
We once had a ’99 Silverado in the shop that was driving the owner crazy. It had an intermittent stalling problem that no one could pin down. The owner had already replaced the fuel pump, ignition coil, and crank sensor. When we hooked up our diagnostic scanner, we noticed the PCM was intermittently dropping communication. It wasn’t throwing a specific code, just creating chaos for the other systems. We installed a VIN-programmed module like this one, and the truck ran perfectly. It’s a powerful reminder that when the vehicle’s brain has a problem, the symptoms can show up anywhere.
Why Choose Our Pre-Programmed 1999-2000 Yukon PCM?
The key to a successful PCM replacement is proper programming. This module isn’t just a part in a box; it’s a complete solution. We use your vehicle’s unique Vehicle Identification Number (VIN) to flash the module with the latest, most stable software updates directly from GM. This critical step ensures the PCM communicates flawlessly with your engine, transmission, anti-lock brake system, and security system. By providing us with your VIN at checkout, you receive a component that is truly ready for installation, saving you a trip to the dealership and additional programming fees.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various codes
- ✔ Engine stalling or shutting off while driving
- ✔ Rough or inconsistent idling
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Failure to start, even with a good battery and starter
- ✔ Decreased fuel economy
- ✔ Misfire codes that don’t resolve with new plugs or coils
- ✔ Communication errors with diagnostic scan tools
This module is a direct replacement for multiple OEM part numbers, including 16263494, 16265035, 8162634940, 218-11787, and 21811787. It fits a wide range of GM trucks and vans from the late 90s and early 2000s. Please verify the fitment list to ensure compatibility with your specific model and year.
Frequently Asked Questions
What is VIN programming and why is it required?
VIN programming is the process of loading your vehicle’s specific software and calibrations onto the PCM. This includes information about your engine size, transmission type, gear ratios, and emissions equipment. Without it, the module will not function correctly, and your vehicle may not start or run properly. We handle this for you before shipping.
How do I provide my VIN?
After placing your order, simply send us a message with your 17-digit VIN. You can typically find it on your vehicle’s dashboard (visible through the windshield on the driver’s side), on your insurance card, or on the driver’s side door jamb sticker.
Will I need to do anything else after installing this PCM?
In many cases, this is a plug-and-play installation. However, some GM vehicles of this era require a security relearn procedure (sometimes called a CASE relearn or Passlock relearn) to synchronize the new PCM with your vehicle’s anti-theft system. This is a simple procedure that can be done with a capable bidirectional scan tool or by following specific key-on/key-off cycles.
My original part number isn’t 16265035, but it’s on the compatible list. Will this work?
Yes. Manufacturers often consolidate or supersede part numbers over time. As long as your original part number is listed as a compatible interchange (like 16263494), this module will function as a direct replacement once programmed to your VIN.
Is this a difficult part to replace?
The physical replacement is generally straightforward for someone with moderate mechanical skill. The PCM is typically located in the engine bay. The key steps are disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The most critical part of the process is ensuring the VIN programming and any necessary security relearns are completed.