Is Your GM Truck or SUV Experiencing Engine Problems?
If your 1999-2000 Cadillac Escalade, Chevrolet Silverado, GMC Sierra, or another compatible GM vehicle is suffering from erratic behavior like stalling, poor fuel mileage, or a persistent check engine light, a failing Powertrain Control Module (PCM) could be the culprit. As the central computer of your vehicle, the PCM is responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, the symptoms can be widespread and frustrating, often leaving you stranded or dealing with an unreliable vehicle.
This replacement Powertrain Control Module is the definitive solution to restore your vehicle’s performance and reliability. We take the guesswork out of the repair by pre-programming the module to your vehicle’s specific Vehicle Identification Number (VIN). This ensures that it arrives with the latest software updates from GM, addressing potential factory bugs and optimizing performance. It’s a direct-fit, plug-and-play solution designed to get you back on the road quickly and confidently.
Before replacing your PCM, always verify your battery’s health and check the main engine ground connections. A weak battery or a corroded ground strap can cause low voltage issues that often mimic the symptoms of a failed PCM, such as no-start conditions or random error codes. A simple check can save you time and money in your diagnosis.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Vehicle refuses to start or has difficulty starting.
- ✔ Rough or unstable engine idle.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Engine stalling or hesitating during acceleration.
- ✔ Communication errors when using a diagnostic scan tool.
The Importance of a VIN-Programmed 1999-2000 Escalade PCM
Simply installing a used or non-programmed module from another vehicle will not work. Modern vehicles rely on a complex network of modules that must communicate correctly. Our professional programming service ensures that this PCM is a perfect match for your vehicle’s factory settings and options. By providing your VIN at checkout, you receive a unit that is ready for installation, loaded with the most current GM calibration for optimal engine and transmission function. This process also ensures compatibility with your vehicle’s anti-theft system, although a security relearn procedure may be required after installation.
This module is a direct replacement for several OEM part numbers, including 16263494, 16265035, and 8162634940. It fits a wide range of GM trucks, vans, and SUVs from the late 90s and early 2000s, including the Chevrolet Express, GMC Savana, S10/Sonoma, Tahoe, and Yukon. Please verify the part number on your original module to ensure a perfect match.
Frequently Asked Questions
Do I need to program this module?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s 17-digit VIN during or after checkout, and the module will arrive ready for installation with the latest GM software.
What is a security relearn procedure?
A security relearn, sometimes called a CASE relearn or Passlock relearn, is a simple procedure that syncs the new PCM with your vehicle’s anti-theft system. It typically involves a sequence of turning the ignition key on and off and can usually be done in your driveway without any special tools. Instructions are widely available online for your specific model.
Where is the PCM located on my vehicle?
The location varies by model. On many trucks like the Escalade, Tahoe, and pickups, it is found in the engine compartment on the driver’s side, sometimes under the battery tray. On vans like the Express and Savana, it’s often located in the rear of the engine compartment. Always disconnect the battery before attempting to remove the old module.
Will this fix my check engine light?
If the check engine light is caused by a fault within the PCM itself (indicated by codes like P0600-P0606) or an issue the PCM is failing to control correctly, then yes, this part will resolve the problem. It is essential to have a proper diagnosis to confirm the PCM is the root cause.
Is this compatible with my 4.3L S10?
Yes, this PCM is compatible with a wide range of GM vehicles from this era, including the S10/Sonoma, Blazer/Jimmy, and Astro/Safari vans equipped with the 4.3L V6 engine. Please check the fitment list and match your original part number (e.g., 16263494) to confirm.