Is Your 1999-2000 GMC Yukon or GM Truck Running Rough?
If you’re dealing with a frustrating no-start condition, intermittent stalling, a persistent Check Engine Light, or harsh transmission shifting, the problem might be deeper than a simple sensor. As a technician with over 20 years of experience under the hood, I’ve seen these exact symptoms countless times on late 90s and early 2000s GM trucks and vans. More often than not, the culprit is a failing Powertrain Control Module (PCM), the electronic brain of your vehicle.
The Core of the Problem: Why PCMs Fail
The PCM in your Yukon, Silverado, or Express van is a complex computer that lives in a harsh environment. It’s constantly subjected to engine heat, vibration, and moisture. Over two decades, these factors take their toll. Internal solder joints can crack, capacitors can leak, and processors can fail, leading to a cascade of confusing and seemingly unrelated issues. You might be chasing phantom sensor codes or replacing parts that don’t fix the root cause.
Expert Pro Tip: Don’t Get Fooled by a Bad Ground!
Before you condemn your PCM, check your grounds! On these GMT400 and early GMT800 platforms, a corroded or loose ground strap (especially the one from the engine block to the firewall or frame) can mimic a failing computer. I’ve seen it dozens of times in my shop. You’ll get weird sensor readings, intermittent stalling, and a host of confusing codes. A few minutes with a multimeter checking for voltage drop across the grounds can save you hundreds of dollars. A good ground should read less than 0.1 volts from the engine to the battery negative post.
The Right Solution: A Pre-Programmed, Ready-to-Install PCM
Simply pulling a module from a junkyard won’t work. These PCMs are VIN-specific and tied into the vehicle’s anti-theft system (VATS/Passlock). This module is the correct, hassle-free solution. We take all the guesswork and expensive dealership visits out of the equation. When you order from us, you get a reliable replacement PCM that is professionally programmed with the latest GM software updates specifically for your vehicle’s VIN.
Key Benefits of This VIN-Programmed Module:
- โ Solves Common Issues: A direct fix for no-start, stalling, rough idle, poor fuel economy, and erratic shifting.
- โ Plug & Play Installation: Because we program it to your VIN, it’s ready to install right out of the box. No need for a trip to the dealer for expensive programming.
- โ Latest GM Software: Your module arrives with the most current factory calibrations, ensuring optimal engine and transmission performance.
- โ Correct Anti-Theft Operation: The programming correctly syncs the PCM to your vehicle’s security system, preventing a no-start situation that occurs with non-programmed modules.
Simple Ordering Process
After you complete your purchase, simply provide us with your vehicle’s 17-digit VIN. Our technicians will handle the programming, ensuring a perfect match. We then ship the module directly to you, ready for installation. It’s the most efficient way to get your truck back on the road and running smoothly.
Part Number Compatibility
This module is a direct replacement for the following service and part numbers. Match your original part number or use our fitment guide to confirm compatibility.
- โ Directly Replaces: 16263494, 16265035, 8162634940, 218-11787, 21811787
Don’t let a faulty computer keep your reliable GM truck sidelined. This is the professional-grade solution that shops and experienced DIYers trust to get the job done right the first time.