Is your 1998-2000 GM truck or SUV suffering from mysterious engine problems? Issues like stalling, poor fuel economy, a persistent check engine light, or a no-start condition often point to a failing Powertrain Control Module (PCM). As the central computer for your engine, the PCM is responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it falters, the entire vehicle’s performance suffers. This replacement PCM, part number 8162634940, is the definitive solution to restore your vehicle’s reliability and driving performance.
This isn’t just a generic, off-the-shelf part. To ensure a seamless installation and proper vehicle operation, we program this module specifically for your vehicle using your unique Vehicle Identification Number (VIN). This critical step loads the latest GM-certified software and calibrations that match your truck’s exact configuration, including its engine, transmission, and emissions equipment. This process ensures that once installed, the module communicates flawlessly with all other systems in your vehicle, eliminating compatibility issues and ensuring a true plug-and-play experience.
From the Diagnostic Bay
We had a 1999 Chevy S10 with the 4.3L V6 come into the shop with a frustrating intermittent stalling issue. The owner had already replaced the fuel pump and ignition coil based on advice from forums, but the problem persisted. It would run fine for days, then suddenly die at a stoplight. No codes were stored. After hours of diagnostics, we noticed the engine would only stall after it was fully warmed up on a hot day. Using a thermal camera, we saw the PCM’s temperature spiking just before it would stall. A faulty internal processor was failing under heat. We installed a VIN-programmed replacement module, and the truck has been running perfectly ever since. It’s a classic example of how a failing PCM can mimic other component failures.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light is on with various or no specific codes.
- ✔ Engine cranks but refuses to start.
- ✔ Unexplained drops in fuel efficiency.
- ✔ Rough or erratic engine idling.
- ✔ Harsh or delayed automatic transmission shifts.
- ✔ The vehicle fails an emissions test.
- ✔ Intermittent stalling or hesitation during acceleration.
Your Solution: A Programmed 1998-2000 Blazer PCM
Choosing the right replacement is crucial for these vehicles. Our process guarantees that the 1998-2000 Blazer PCM you receive is prepared for your specific vehicle. By programming it with your VIN, we ensure it has the correct software to manage your engine’s performance, control the transmission correctly, and integrate with your vehicle’s anti-theft system (VATS/Passlock). This eliminates the need for an expensive trip to the dealership for programming. Simply install the module, perform the security relearn procedure if necessary, and get your truck back on the road.
This module is a direct replacement for several original equipment part numbers, including: 16263494, 16265035, 8162634940, 218-11787, and 21811787. Please verify the part number on your original module to ensure compatibility.
Frequently Asked Questions
Why do I need to provide my VIN?
Your vehicle’s VIN (Vehicle Identification Number) allows us to program the PCM with the exact software and calibrations specified by GM for your truck’s engine, transmission, and options. This step is essential for the module to function correctly and is included with your purchase.
Is this a plug-and-play part?
Yes, because we program it to your VIN, it is designed to be plug-and-play. In some cases, you may need to perform a simple, key-on/key-off security relearn procedure to sync the new PCM with your vehicle’s anti-theft system. Instructions for this are readily available and do not require special tools.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, this replacement will solve the issue. However, it’s important to properly diagnose your vehicle first, as the light can be triggered by many other failing components like sensors or wiring issues.
Where is the PCM located on my vehicle?
On most models covered, such as the S10/Blazer/Jimmy, the PCM is located in the engine compartment on the passenger’s side firewall or inner fender. On Express/Savana vans, it’s typically in the LH rear of the engine compartment. Always disconnect the battery before attempting removal or installation.
What if my original part number isn’t listed?
The listed part numbers (16263494, 16265035, 8162634940) are the most common service replacements. If your number is different, please contact us with your VIN and original part number to confirm compatibility before ordering.