Programmed 1998-2000 Blazer S10 PCM 218-11787 | VIN Matched | GM

Restore Peak Performance to Your GM Truck or Van

As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing Powertrain Control Module (PCM) can turn a reliable vehicle into a source of constant frustration. If your 1998-2000 Blazer, Jimmy, or another compatible GM vehicle is suffering from mysterious drivability problems, erratic behavior, or a persistent Check Engine light, the solution is often simpler than you think. This isn’t just a replacement part; it’s a direct-fit, fully programmed solution designed to get you back on the road with confidence.

The PCM is the brain of your engine, managing everything from fuel mixture and ignition timing to transmission shifting and emissions controls. When it falters, the symptoms can be confusing and often lead to misdiagnosing other components. We take the guesswork out of the repair. By providing us with your Vehicle Identification Number (VIN) at checkout, we program this module with the latest official GM software updates specific to your vehicle. This ensures optimal performance, fuel efficiency, and seamless integration, eliminating the need for an expensive trip to the dealership for programming.

Is Your GM Vehicle Showing These Signs?

A faulty PCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution:

• ✔ Check Engine Light is illuminated with codes like P0601, P0604, or P0606.
• ✔ Your engine cranks but refuses to start.
• ✔ Unexplained drops in fuel economy.
• ✔ Rough or unpredictable shifting from the automatic transmission.
• ✔ The engine stalls unexpectedly, either at idle or while driving.
• ✔ You’ve failed an emissions test.
• ✔ Communication errors with diagnostic scan tools.

Your Straightforward Installation Guide

Installing your new 1998-2000 Blazer S10 PCM is a manageable job for a confident DIYer. Follow these steps carefully for a successful replacement.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow the system to fully discharge.
2. Locate the PCM: On most S10/Blazer/Jimmy models, the PCM is located in the engine bay on the front right (passenger side) fender wall. On vans and full-size trucks, it may be on the left side. Visually confirm its location before starting.
3. Disconnect Connectors: Carefully unclip and remove the wiring harness connectors from the old module. These connectors have locking tabs; do not force them. Inspect the pins for any corrosion or damage.
4. Remove the Old Module: Unbolt the old PCM from its mounting bracket. Keep the hardware as you may need to reuse it.
5. Install the New Module: Bolt the new, programmed PCM into the mounting bracket. Reconnect the wiring harnesses, ensuring they click securely into place.
6. Reconnect Battery: Reattach the negative battery terminal.
7. Perform Security Relearn (CRITICAL): You must perform the GM Security Relearn Procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. This allows your vehicle’s anti-theft system to recognize the new PCM. Your vehicle will not start until this is completed.

Verified Fitment For These GM Models

This module is a direct replacement for part numbers 16263494, 16265035, 8162634940, and 218-11787. Please verify your vehicle is on this list and, if noted, that the ID number on your original module matches.