Is Your Work Van Unreliable? Let’s Get it Fixed.
As a technician with over two decades of experience, I know that for a 1999-2002 GMC Savana 3500 owner, downtime isn’t just an inconvenienceโit’s lost money. When your van starts acting up with bizarre, hard-to-pinpoint issues, the Powertrain Control Module (PCM) is often the silent culprit. These vehicles are workhorses, but their electronics are now over 20 years old, and failures are becoming more common every day.
You might be pulling your hair out trying to diagnose the problem. Maybe it cranks but won’t start, or it dies randomly at a stoplight. Perhaps the transmission is shifting harshly or hunting for gears. These are classic signs that the vehicle’s central computer is failing.
Common Symptoms of a Failing GM PCM
I’ve seen hundreds of these trucks and vans in my shop with PCM issues. The symptoms can seem unrelated, which is why it’s so frustrating for owners and even some technicians to diagnose. Look out for:
- โ No-start or intermittent starting conditions.
- โ A persistent Check Engine Light, even after replacing sensors.
- โ Harsh or erratic automatic transmission shifting.
- โ Poor fuel economy and engine performance.
- โ Communication errors with diagnostic scan tools.
- โ Stalling for no apparent reason, either while driving or at idle.
Expert Pro Tip: The Critical Importance of VIN Programming
Don’t ever install a used PCM from a junkyard without proper programming. On these GM vehicles, the PCM is tied directly to your specific Vehicle Identification Number (VIN). This programming dictates everything: fuel injector pulse width, ignition timing, transmission shift strategies, and critically, the Passlock anti-theft system. Plugging in a non-programmed module will result in a no-start condition every time. Our service eliminates this headache. We flash the module with the latest GM-certified software for your exact VIN, ensuring it communicates perfectly with your van’s other systems right out of the box.
The Guaranteed, Hassle-Free Solution
This isn’t just a replacement part; it’s a complete solution. We are providing a Powertrain Control Module that is professionally programmed to your specific vehicle. When you purchase, simply provide us with your van’s VIN. Our technicians will then load the correct, updated GM software onto the module before it ships. This means no expensive trips to the dealership for programming.
Why Our Programmed PCM is the Right Choice
- โ VIN-Specific Programming Included: We flash the module with the newest GM calibration for your exact 1999-2002 Savana 3500.
- โ Restores Original Performance: Corrects issues caused by a faulty computer, restoring smooth operation and fuel efficiency.
- โ Direct-Fit Replacement: This module is a direct replacement for part numbers 16263494, 16265035, 8162634940, 218-11787, and 21811787.
- โ Simple Installation: After installation, you may need to perform a simple security relearn procedure (often called a VATS or Passlock relearn), which takes about 30 minutes and requires no special tools. This syncs the new PCM to your existing keys.
Stop chasing ghosts in your electrical system. A failing PCM can mimic a dozen other problems. By replacing the core computer, programmed specifically for your van, you’re addressing the root cause and ensuring your Savana 3500 gets back to being the reliable work vehicle you depend on. Please verify your part number and check our extensive fitment list to confirm compatibility.