Programmed 1999-2000 Tahoe PCM 16263494 | VIN-Matched | Chevy & GMC

Restore Peak Performance to Your GM Truck or SUV

Is your 1999-2000 Chevrolet Tahoe or another GM vehicle acting up? If you’re dealing with a persistent check engine light, rough idling, stalling, or poor fuel economy, the problem often traces back to a failing Powertrain Control Module (PCM). As the electronic brain of your vehicle, the PCM is responsible for managing everything from fuel mixture and ignition timing to transmission shifting. When it starts to fail, the symptoms can be frustrating and difficult to diagnose.

I’ve spent over two decades in the shop, and I’ve seen countless drivers spend a fortune chasing sensor-related codes, only to find the root cause was the PCM itself. This module is a direct-fit, reliable solution designed to get your vehicle running smoothly again without the guesswork. We take the hassle out of the replacement process by pre-programming this module specifically for your vehicle using your VIN. This means it arrives at your door with the latest GM software updates, ready for installation. You skip the expensive trip to the dealership for programming, saving you both time and money.

Is Your Truck Showing These Telltale Signs?

A failing PCM can cause a wide range of issues. If you’re experiencing any of the following, it might be time for a replacement:

• ✔ Persistent Check Engine Light (CEL)
• ✔ Stalling or cutting out while driving
• ✔ Rough or erratic engine idle
• ✔ Noticeable decrease in fuel efficiency
• ✔ Harsh or incorrect transmission shifting
• ✔ Failure to pass an emissions test
• ✔ No-start condition where the engine cranks but won’t fire
• ✔ Diagnostic Trouble Codes (DTCs) such as P0601, P0604, or P0606 pointing to internal module failure.

A Straightforward Guide to Installation

Replacing the 1999-2000 Tahoe PCM is a job most DIYers can handle in their own garage. Our pre-programming service eliminates the most difficult step. Here’s a basic overview:

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
2. Locate the PCM: On most GMT400 and early GMT800 trucks like the Tahoe, the PCM is located in the engine bay, typically on the driver’s side fender well or near the battery.
3. Disconnect Connectors: Carefully unlatch and remove the electrical harness connectors from the old module. These connectors have locking tabs, so be gentle to avoid damage.
4. Remove the Old Module: Unbolt the old PCM from its mounting bracket. Keep the hardware as you will need it for the new unit.
5. Install the New Module: Mount your new, pre-programmed PCM onto the bracket and securely re-fasten the bolts.
6. Reconnect Everything: Firmly plug the harness connectors into the new module until they click into place. Reconnect the negative battery terminal.
7. Perform Security Relearn: In many cases, you will need to perform a simple security or anti-theft relearn procedure. This can typically be done without special tools and involves a sequence of turning the key. Instructions are readily available online for your specific model.

Verified Vehicle Compatibility

This module, identified by part number 16263494, is a direct replacement for a wide range of GM vehicles. It is also compatible with part numbers 16265035, 8162634940, 218-11787, and 21811787. Please verify your vehicle from the list below. After purchase, simply provide us with your VIN to ensure perfect programming.