Restore Peak Performance to Your GM Truck or SUV
Is your 1999-2000 Sierra 1500, or another compatible GM vehicle, suddenly acting up? If you’re dealing with frustrating issues like a persistent Check Engine Light, erratic shifting, stalling, or a sudden drop in fuel economy, the problem often points directly to a failing Powertrain Control Module (PCM). As the central computer of your vehicle, a faulty PCM can cause a cascade of problems that are often misdiagnosed. This isn’t just an inconvenience; it affects your truck’s reliability, safety, and performance.
This replacement PCM, part number 9354896, is the definitive solution. We take the guesswork and hassle out of the repair by programming the module specifically for your vehicle using your VIN. This means it arrives at your door with the latest GM software updates already installed, ready for a straightforward installation. You get a reliable fix that restores factory performance without the expensive trip to a dealership for programming.
Case Study: A Tricky Diagnosis
I remember a 2000 Silverado 2500 that came into my shop with a complaint of harsh, unpredictable shifting and an intermittent no-start. The owner had already replaced the transmission speed sensor and a few solenoids with no luck. We scanned it and found no specific transmission codes, just a generic internal controller error (P0601). After checking all the wiring and grounds between the transmission and the PCM, everything looked solid. On a hunch, we connected a scope to the PCM outputs controlling the shift solenoids and saw the signals were dropping out randomly. We swapped in a VIN-programmed 1999-2000 Sierra 1500 PCM (the same part number), performed the security relearn, and the truck drove like it was new. It’s a classic example of how a failing computer can mimic a major mechanical failure, costing the owner time and money on unnecessary parts.
Is Your Vehicle Exhibiting These Symptoms?
- ✔ Persistent Check Engine Light with codes like P0601, P0602, or P0606 (Internal Control Module Failure).
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Unexplained stalling or difficulty starting the engine.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ Engine running rough, misfiring, or hesitating on acceleration.
- ✔ Failure to pass state emissions testing.
A Straightforward Guide to Installation
Replacing the PCM on these GM trucks is a job most DIYers can handle in under an hour. Our pre-programming service eliminates the most difficult step, making this a true plug-and-play repair.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On most trucks like the Sierra and Silverado, the PCM is located on the driver’s side of the engine bay, typically under or next to the battery tray.
- Disconnect the Connectors: Carefully unclip and remove the large wiring harness connectors from the old PCM. They have locking tabs that need to be released.
- Remove the Old Module: Unbolt the PCM from its mounting bracket. It’s usually held in by a few small bolts.
- Install the New PCM: Mount your new, pre-programmed PCM into the bracket and securely fasten it.
- Reconnect Everything: Plug the wiring harnesses back into the new module until they click firmly into place. Reconnect the negative battery terminal.
- Perform Security Relearn: You will need to perform a simple security relearn procedure (often called a Passlock or VATS relearn) so the vehicle recognizes the new PCM. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. Your vehicle’s service manual will have the exact steps.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 9354896, 09354896, and 19109040. It is guaranteed to fit the following vehicles with the specified options:
- 1999-2000 Cadillac Escalade: Electronic Control Module (LH front under battery)
- 1999-2002 Chevrolet Camaro: Electronic Control Module (behind RH strut tower), 5.7L
- 1999-2000 Chevrolet Silverado 1500 & 2500 Pickup: Electronic Control Module (LH front under battery), 8 Cylinder
- 2000 Chevrolet Suburban 1500 & 2500: Electronic Control Module (LH front under battery)
- 2000 Chevrolet Tahoe: Electronic Control Module (Silverado style, LH front below battery)
- 1999-2000 Chevrolet Corvette: Electronic Control Module (RH engine compartment)
- 1999-2002 Pontiac Firebird: Electronic Control Module (behind RH strut tower), 5.7L
- 1999-2000 GMC Sierra 1500 & 2500 Pickup: Electronic Control Module (LH front under battery), 8 Cylinder
- 2000 GMC Yukon: Electronic Control Module (LH front under battery), exc. Denali
- 2000 GMC Yukon XL 1500 & 2500: Electronic Control Module (LH front under battery)
Frequently Asked Questions
Frequently Asked Questions
How does the VIN programming work?
After you place your order, you will provide us with your vehicle’s 17-digit VIN. We use this to load the latest, most compatible GM factory software onto the module before we ship it. This ensures it works correctly with your specific engine, transmission, and options.
Do I need to do anything after installing this 1999-2000 Sierra 1500 PCM?
Yes. While the main engine and transmission programming is done, you must perform a security relearn procedure. This syncs the new PCM with your vehicle’s anti-theft system and is required to start the engine. It’s a simple key-cycle process that you can do yourself.
Is this a new or used part?
This is a high-quality, inspected, and tested recycled OEM part. Each unit is verified for full functionality before being programmed and shipped, offering OEM reliability at a fraction of the cost.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls the transmission shift points and solenoid operations. If your hard or erratic shifting is caused by a faulty computer, this part is the correct fix. It’s a very common symptom for a failing PCM on these GM trucks.
What is the part number for this module?
This module is a direct replacement for service number 9354896 and interchangeable part numbers 09354896 and 19109040.