Is your 1999 or 2000 Chevrolet Tahoe, Suburban, or GMC Yukon experiencing frustrating issues like a persistent check engine light, rough idling, stalling, or poor fuel economy? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your vehicle’s engine and transmission performance. A faulty PCM can disrupt everything from fuel delivery to ignition timing, leaving you with an unreliable and inefficient vehicle. Don’t let a malfunctioning computer keep you off the road. This direct replacement PCM is the solution to restore your truck’s original performance and dependability.
This module arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We install the latest, most stable software updates available from GM, ensuring that all known bugs and drivability issues from the factory are corrected. This critical programming step means you get a component that is truly ready for installation, designed to communicate flawlessly with your vehicle’s existing systems. Simply provide us with your VIN after purchase, and our technicians will handle the complex programming process before the unit is shipped.
From the Diagnostic Bay
We had a ’99 GMC Yukon come into the shop that was driving the owner crazy. It would randomly stall at stoplights and had a check engine light for an obscure transmission sensor code that kept coming back, even after replacing the sensor twice. After hours of chasing wires, we finally hooked up a scope to the PCM outputs and found the signal was dropping out intermittently. We installed one of these VIN-programmed modules, performed the security relearn, and the truck ran perfectly. The owner called a week later to say it hadn’t stalled once and his fuel mileage had even improved. It’s a perfect example of how a failing computer can create phantom symptoms that seem unrelated.
Diagnosing a Failing 1999-2000 Tahoe PCM
A failing powertrain control module can manifest in various ways, often mimicking other component failures. If you’re experiencing any of the following symptoms, your PCM could be the culprit. Verifying these issues can help you confidently determine that you need a replacement.
- ✔ Check Engine Light: The check engine light is illuminated, and you may have codes stored related to module communication errors (U-codes) or multiple, unrelated sensor faults.
- ✔ Engine Performance Problems: You may notice rough running, engine misfires, stalling, hesitation during acceleration, or a significant loss of power.
- ✔ Poor Fuel Economy: If the PCM isn’t correctly managing the air-fuel mixture, you’ll see a noticeable drop in your vehicle’s MPG.
- ✔ Transmission Shifting Issues: The PCM also controls transmission functions. A faulty unit can cause harsh shifting, delayed engagement, or failure to shift into certain gears.
- ✔ No-Start Condition: In severe cases, a complete PCM failure can prevent the engine from starting at all, as it fails to control the fuel injectors or ignition coils.
- ✔ Failed Emissions Test: An improperly functioning PCM will prevent your vehicle from passing a smog or emissions inspection.
Replacing your old, failing module with our correctly programmed unit is the most effective way to resolve these issues and restore the precise factory-engineered performance of your GM truck or van. This part is a direct fit for a wide range of vehicles, including the Chevrolet Express, GMC Savana, Chevy S10, GMC Sonoma, and more. Please verify your original part number and check the detailed fitment list to ensure compatibility.
Frequently Asked Questions
Do I need to do any programming after I receive this module?
No. We program the module with the latest GM software using the VIN you provide. However, you will need to perform a simple security relearn procedure (often called a CASE learn or anti-theft relearn) after installation. This process syncs the new module to your vehicle’s keys and can typically be done without any special tools. Instructions are readily available online for your specific model.
How do I provide my VIN number?
After you complete your purchase, you can send us a message with your 17-digit VIN. We cannot ship the module until we have this information, as the programming is specific to your vehicle.
Is this a plug-and-play part?
Yes, once the security relearn procedure is completed, this module is plug-and-play. The physical installation involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and installing the new one in its place.
Will this fix my specific vehicle’s problem?
This module will fix issues directly caused by a faulty PCM. While the symptoms listed are common indicators of PCM failure, it’s always best to have a proper diagnosis performed to rule out other potential causes like wiring issues or failed sensors.
What part numbers does this module replace?
This PCM is a direct replacement for several part numbers, including 16263494, 16265035, 8162634940, 218-11787, and 21811787. Please match one of these numbers to your original unit to confirm compatibility.