Restore Your Truck’s Performance with a VIN-Programmed PCM
If your 1999-2000 GMC Yukon, or another compatible GM truck or van, is suffering from strange electrical gremlins, poor performance, or a persistent check engine light, the problem often traces back to a failing Powertrain Control Module (PCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty PCM can cause a cascade of frustrating issues. This isn’t just a part; it’s the central computer of your vehicle, and when it fails, nothing works right. That’s why we offer a reliable, direct-fit solution: a high-quality PCM, part number 218-11787, that arrives at your door fully programmed to your vehicle’s specific VIN with the latest GM software updates.
A Technician’s Notebook
I remember a 2000 Yukon Denali that came into my bay with a complaint that stumped two other shops. It had an intermittent no-start, would occasionally stall at red lights, and the transmission would slam into gear. There were no consistent trouble codes, just a history of random communication errors. After checking all the usual suspects—grounds, battery, alternator—I focused on the PCM. On these GMT800 platform trucks, I’ve seen the internal processors of the PCM begin to fail from years of heat cycles and vibration. We swapped in a VIN-programmed module just like this one, and the truck ran like it just rolled off the assembly line. It’s a classic failure, and this is the definitive fix.
Is Your Truck or Van Showing These Symptoms?
A failing PCM can manifest in many ways. If you’re experiencing any of the following, it’s a strong indicator that your vehicle’s computer needs attention. A proper diagnosis is always recommended, but these are the tell-tale signs I look for in the shop:
- ✔ Check Engine Light is on with codes like P0601, P0604, or P0606.
- ✔ Vehicle refuses to start or has a hard starting condition.
- ✔ Poor or erratic automatic transmission shifting.
- ✔ A noticeable drop in fuel economy.
- ✔ Engine stalling, stumbling, or running rough.
- ✔ Failure to communicate with a diagnostic scan tool.
- ✔ Problems passing an emissions test.
The Hassle-Free Solution: A Pre-Programmed 1999-2000 Yukon PCM
The biggest headache with replacing a PCM has always been the programming. In the past, you’d have to install the part and then have your vehicle towed to a dealership for expensive flashing. We eliminate that step entirely. Simply provide us with your vehicle’s VIN during checkout, and our experts will program the module with the correct, updated software from GM. This ensures that when the part arrives, it’s ready for installation, saving you time, money, and frustration. This 1999-2000 Yukon PCM is the smart, efficient way to get your truck back to peak condition.
A Straightforward Guide to Installation
Installing your new PCM is a job most DIYers can handle with basic tools in their own driveway. Follow these steps to get back on the road quickly.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent any accidental reconnection.
- Locate the PCM: On most compatible trucks and SUVs like the Yukon, Tahoe, and Silverado, the PCM is located in the engine compartment, typically on the driver’s side near the battery or firewall. In Express and Savana vans, it’s often in the LH rear of the engine compartment.
- Disconnect the Connectors: The PCM will have several large multi-pin electrical connectors. Carefully release the locking tabs or levers and pull the connectors straight out. Never force them. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the PCM from its mounting bracket. There are usually two or three bolts holding it in place.
- Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and secure it with the bolts. Reconnect the electrical connectors, ensuring they click securely into place.
- Reconnect the Battery: Reattach the negative battery terminal.
- Perform Security Relearn (If Needed): Many GM vehicles of this era require a simple security relearn procedure. Turn the key to the ‘ON’ position (without starting the engine) for 10-15 minutes. Turn it ‘OFF’ for 10 seconds. Repeat this cycle two more times. On the fourth try, the vehicle should start and run normally.
Verified Vehicle Compatibility
This module is a direct replacement for multiple part numbers, including 16263494, 16265035, and 8162634940. It is guaranteed to fit the following models with the specified options. Please verify your vehicle is on this list before ordering.
Frequently Asked Questions
Do I need to program this module?
No. This PCM comes fully programmed to your vehicle’s VIN before we ship it. It is ready for installation right out of the box. Please provide your VIN at checkout.
Where do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your driver’s side door jamb sticker, on your insurance card, or on the dashboard plate visible through the driver’s side of the windshield.
Will this definitely fix my Check Engine Light?
If the Check Engine Light is caused by an internal failure of the PCM (common codes P0601-P0606), then this part is the correct fix. However, many other sensors and components can trigger the light. A proper diagnosis is the best way to confirm the PCM is the root cause.
What is the ‘security relearn’ procedure?
It’s a simple process that syncs your new PCM with the vehicle’s anti-theft system (Passlock/Passkey). It typically involves cycling the ignition key on and off in a specific timed sequence, as described in the installation guide above. No special tools are required.
My old part has a different number on it. Will this still work?
Yes. This module, 218-11787, is the service replacement for several original part numbers, including 16263494 and 16265035. As long as your vehicle is on our compatibility list, this is the correct part for you.