Restore Peak Performance to Your GM Truck or SUV
Is your 1999-2000 Chevrolet Tahoe, Suburban, or GMC Yukon suffering from perplexing 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 of your vehicle, the PCM is responsible for managing everything from fuel mixture and ignition timing to transmission shift points and emissions controls. When it fails, the entire vehicle’s performance and reliability are compromised.
This replacement PCM, service number 16263494, is the definitive solution to get your vehicle running like new again. We take the guesswork out of the repair by programming the module specifically for your truck or van using your Vehicle Identification Number (VIN). This ensures that all factory settings, software, and the latest GM updates are loaded correctly, making for a seamless installation process. Simply provide your VIN after purchase, and we’ll handle the complex programming before it even ships.
From the Diagnostic Bay
I once had a 2000 GMC Sierra 2500 in the shop with a transmission that was shifting hard and erratically. The owner had already replaced the transmission, thinking that was the culprit, but the problem persisted. After hours of chasing wires and checking sensors, we finally traced the issue back to the PCM. The internal drivers that control the transmission solenoids had failed. A new, properly programmed PCM solved the issue instantly. It’s a powerful reminder that what seems like a major mechanical failure can often be an electronic one, and the PCM is the master controller.
Symptoms of a Failing PCM 16263494
- ✔ Unexplained Check Engine Light (CEL) illumination
- ✔ Vehicle fails to start or stalls intermittently
- ✔ Harsh or delayed automatic transmission shifting
- ✔ Noticeable decrease in fuel economy
- ✔ Engine misfires, rough idling, or hesitation during acceleration
- ✔ Communication errors with diagnostic scan tools
- ✔ Failure to pass state emissions testing
Why a VIN-Programmed 1999-2000 Tahoe PCM is Essential
The 1999-2000 Tahoe PCM is not a one-size-fits-all component. It must be precisely calibrated to your vehicle’s specific configuration, which includes engine size (4.3L, 5.0L, 5.7L), transmission type, gear ratios, and factory options. Attempting to install a module from another vehicle without correct programming will lead to immediate performance issues, warning lights, and may even prevent the vehicle from starting due to the anti-theft system (PassLock/VATS). Our professional programming service ensures this module is a true plug-and-play solution. Once installed, you may need to perform a simple security relearn procedure, which can be done without any special tools and takes about 30 minutes. This vital step syncs the new module with your vehicle’s anti-theft system.
This module is a direct replacement for a wide range of part numbers, including 16263494, 16265035, and 8162634940. It fits an extensive list of GM vehicles from the late 90s and early 2000s, including the Chevrolet Express, GMC Savana, S10/Sonoma, Blazer/Jimmy, and Cadillac Escalade. Please verify your part number and consult the detailed fitment list to ensure compatibility.
Frequently Asked Questions
Why do you need my vehicle’s VIN?
Your Vehicle Identification Number (VIN) allows us to access the exact factory calibration file for your specific vehicle. This programming ensures the PCM correctly manages your engine, transmission, emissions systems, and anti-theft features, guaranteeing proper function and a seamless installation.
Is this module difficult to install?
The physical installation is straightforward for most DIY mechanics. It typically involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and then reversing the process. Because we pre-program the unit, no special computer tools are needed. You may only need to perform a security relearn procedure, which involves a series of key cycles.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the PCM itself (e.g., processor faults, driver circuit errors), then this replacement module will solve the problem. However, if the light is on due to a faulty sensor or other component on the vehicle, that separate issue will still need to be addressed.
What is a security relearn procedure?
The security relearn, or VATS/PassLock relearn, is a process that syncs your new PCM with the vehicle’s existing anti-theft system. It’s a simple procedure that usually involves turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’ for 10 seconds, and repeating this sequence three times. This allows the components to recognize each other and authorize the engine to start.
Is this compatible with other part numbers?
Yes, this PCM is a direct replacement for several part numbers, including 16265035, 8162634940, 218-11787, and 21811787. It is designed to function identically to the original module in a wide range of compatible GM vehicles.