Restore Your Truck’s Heartbeat and Drive with Confidence
Is your truck suffering from frustrating, hard-to-diagnose issues? An intermittent check engine light, erratic transmission shifting, a sudden drop in fuel economy, or even a no-start condition can all point to a failing Powertrain Control Module (PCM). This isn’t just an inconvenience; it’s a compromise on your vehicle’s reliability and your peace of mind. This replacement module is the definitive solution, designed to restore the crisp, dependable performance you expect from your GM vehicle. We take the guesswork and dealership hassle out of the equation by pre-programming the unit to your vehicle’s specific VIN with the latest GM software updates. It arrives at your door ready for a straightforward installation, getting you back on the road quickly and safely.
Warning Signs Your PCM Needs Attention
- ✔ Persistent Check Engine Light: Especially for internal module codes like P0601, P0602, or P0606.
- ✔ Erratic Transmission Behavior: Harsh shifting, getting stuck in gear, or delayed engagement are classic symptoms.
- ✔ Poor Engine Performance: Noticeable loss of power, stumbling, or stalling can indicate a faulty computer.
- ✔ Reduced Fuel Efficiency: If you’re suddenly making more trips to the pump, the PCM could be failing to manage the engine correctly.
- ✔ Vehicle Won’t Start: A completely failed module can prevent the ignition or fuel systems from activating.
- ✔ Communication Errors: If your scan tool cannot communicate with the computer, it’s a strong sign of failure.
Guided Installation for a Confident Fix
Replacing your PCM is a manageable job for a DIYer with basic tools. Follow these steps to get your vehicle running right again. On most trucks listed, the module is located under the battery tray on the driver’s side.
- Safety First: Begin by disconnecting the negative terminal of your vehicle’s battery to prevent any electrical shorts.
- Access the Module: You will likely need to remove the battery and the battery tray to gain clear access to the old PCM.
- Disconnect Harnesses: Carefully unplug the electrical connectors from the module. There are typically three large connectors with locking tabs that need to be released.
- Remove the Old Unit: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Seat your new, pre-programmed module into the mounting bracket and secure it with the bolts.
- Reconnect Everything: Firmly plug the electrical harnesses back into the new PCM until they click into place. Reinstall the battery tray and the battery, then reconnect the negative terminal.
- Perform Security Relearn: A simple security relearn procedure may be necessary. Turn the key to the ‘ON’ position for 10-12 minutes, then ‘OFF’ for 30 seconds. Repeat this cycle three times. On the final cycle, the vehicle should start.
An Expert’s Note: Chasing Ghosts in the Machine
I once worked with a customer who had spent months and over a thousand dollars trying to solve a random stalling issue on his 2000 Silverado. He’d replaced the fuel pump, crank sensor, and ignition coil packs, but the problem persisted. Frustrated, he brought it to our shop. We ran diagnostics and found no hard codes, but we noticed the data stream from the PCM would momentarily drop out. It was the computer itself, glitching internally. We installed a VIN-programmed PCM, and the truck ran perfectly. It’s a powerful reminder that sometimes the ‘brain’ is the source of the phantom pains, and the right module is the only cure.
Tailored Fit for Your GM Vehicle
This 1999-2000 Sierra 1500 Powertrain Control Module is engineered for a precise fit and seamless communication with a wide range of GM cars and trucks. Please verify your vehicle and options from the list below. This unit is a direct replacement for part numbers 19109040, 09354896, and 9354896.
- CAMARO: 1999-2002 (5.7L)
- CORVETTE: 1999-2000
- FIREBIRD: 1999-2002 (5.7L)
- SIERRA 1500 PICKUP: 1999-2000 (8 cylinder)
- SIERRA 2500 PICKUP: 1999-2000
- SILVERADO 1500 PICKUP: 1999-2000 (8 cylinder)
- SILVERADO 2500 PICKUP: 1999-2000
- SUBURBAN 1500/2500: 2000
- TAHOE: 2000 (Silverado style)
- YUKON: 2000 (exc. Denali)
- YUKON XL 1500/2500: 2000
Frequently Asked Questions
Do I need to do any programming or flashing myself?
Absolutely not. We handle all the programming for you before shipment. Simply provide us with your vehicle’s VIN after you place your order, and we will flash the module with the latest GM software specific to your truck. It will be ready for installation right out of the box.
Where is the PCM located on my 2000 GMC Sierra?
On most 1999-2000 Sierra, Silverado, Tahoe, and Yukon models, the PCM is located in the engine compartment on the driver’s side, underneath the battery and battery tray.
Will this fix my harsh transmission shifting?
While other issues can cause transmission problems, a failing PCM is a very common culprit. The module controls shift points and line pressure, and when it malfunctions, it can lead to poor shifting. Replacing a faulty PCM often resolves these specific issues.
What is the security relearn procedure you mentioned?
It’s a simple process to sync the new module with your vehicle’s anti-theft system. After installation, you’ll cycle the key from ‘ON’ to ‘OFF’ in a specific timed sequence (usually three 10-minute cycles). This allows the systems to recognize each other. Detailed instructions are readily available online for your specific model.
How do I send you my VIN?
After you complete your purchase, you will receive instructions on how to reply with your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we have this information to program it correctly.