Is Your GM Truck or Van Running Rough?
If you’re dealing with frustrating and unpredictable engine problems like stalling at stoplights, harsh shifting, a no-start condition, or a persistent Check Engine Light, a failing Powertrain Control Module (PCM) is often the culprit. For the workhorse GM vehicles of the late 90s and early 2000s, the PCM is the brain of the operation. When it fails, it can cause a cascade of issues that are difficult to diagnose. This isn’t just an inconvenience; it’s a loss of the reliability you depend on. Stop throwing parts at the problem and get the definitive solution that restores your vehicle’s performance and your peace of mind.
Common Symptoms & Your Solution
A faulty engine computer can manifest in numerous ways. You might be experiencing one or more of the following:
- Poor or erratic engine performance
- Engine stalling or cutting out unexpectedly
- Harsh or incorrect automatic transmission shifting
- Reduced fuel economy
- Check Engine Light illuminated with communication codes (like U-codes) or internal module failure codes (like P0601 or P0606)
- Complete no-start condition where the engine cranks but won’t fire up
This module is the direct solution to these problems. We provide a high-quality, dependable programmed 16263494 PCM that has been meticulously tested and flashed with the latest official GM software updates specifically for your vehicle. By providing us with your VIN at checkout, you receive a module that is ready to install right out of the box, eliminating the need for an expensive trip to the dealership for programming.
Features & Benefits
- ✔ VIN-Specific Programming: Arrives pre-programmed to your vehicle’s unique VIN, ensuring perfect compatibility and communication with other onboard modules.
- ✔ Latest GM Software: We flash the unit with the most current GM calibration, often improving performance, shifting, and fuel efficiency over the original software.
- ✔ Plug-and-Play Installation: Simply disconnect the battery, swap the module, and reconnect. This straightforward process gets you back on the road faster. (Note: A security relearn procedure may be required on some models, which is a simple process.)
- ✔ Cost-Effective Repair: Avoid the high costs and scheduling hassles of a dealership service department. This is the smart, efficient fix for both DIYers and professional shops.
- ✔ Restored Dependability: Regain the confidence that your truck or van will start and run reliably every single time, just as it should.
Expert Insight: The “Ghost in the Machine” Fixed
As a technician for over two decades, I’ve seen countless owners and even other shops chase their tails trying to fix intermittent issues on these GMT400 and GMT800 platform vehicles. They replace sensors, fuel pumps, and ignition components, only for the problem to return. The original PCM from this era can develop internal faults that create these “ghost” problems. Installing a properly tested and programmed 16263494 PCM isn’t just replacing a part; it’s performing a brain transplant that eliminates those hidden electronic gremlins and restores the vehicle’s core operational logic. It’s the most satisfying fix because it works.
This module is a direct replacement for part numbers 16263494, 16265035, 8162634940, 218-11787, and 21811787, and fits a wide range of Chevrolet, GMC, and Isuzu trucks and vans. Please verify the fitment list to ensure compatibility with your exact model. Get your vehicle running properly again with this reliable, programmed 16263494 PCM.
Frequently Asked Questions
How do I provide my Vehicle Identification Number (VIN)?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot program and ship your module without it, so please provide it promptly to avoid delays.
Will I need to do anything after I install the module?
In most cases, you will need to perform a simple security relearn procedure, which can typically be done without special tools and involves a sequence of key turns. Instructions are widely available online for your specific model. Some vehicles may also require a Crankshaft Variation Relearn (CASE Relearn) with a scan tool for optimal performance, though the vehicle will still run without it.
Is this a new part?
This is a genuine OEM module that has been meticulously inspected, tested, and returned to full operational specifications. We then program it with the latest software for your vehicle, ensuring it meets or exceeds the performance of the original unit.
My original part number is different. Will this still work?
Yes. This module is a compatible replacement for several part numbers, including 16263494, 16265035, and 8162634940. As long as your vehicle is on the compatibility list, we will program this module to function perfectly for your application.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls both the engine and the transmission. If your shifting issues are caused by faulty electronic commands from the module, this replacement will resolve them and restore smooth, proper shifting.