Is Your Blazer, Jimmy, or S10 Acting Up?
If you’re dealing with a frustrating check engine light, erratic shifting from your 4L60E transmission, poor fuel mileage, or a vehicle that just won’t start, the problem might not be what you think. Over my 20+ years in the bay, I’ve seen countless owners and even other shops chase their tails replacing sensors and transmission solenoids, only to find the root cause was the brain of the operation all along: the Powertrain Control Module (PCM).
“A customer’s 2000 Blazer S10 came in last week with these exact symptoms. It had a harsh 1-2 shift and would intermittently throw codes for the MAP sensor and an O2 sensor, even after they were replaced. He was convinced his transmission was failing. We connected our scan tool and saw erratic data streams coming from the PCM. After installing one of our VIN-programmed modules, the shifting smoothed out, the codes vanished, and the truck ran better than it had in years. Itโs a classic case of a failing PCM causing ghost-like symptoms elsewhere in the vehicle.”
The Technician’s Choice for a Reliable Fix
The PCM in these late 90s GM trucks is a workhorse, but it’s not invincible. Located in the harsh environment of the engine bay (typically on the right-hand side on the S10/Blazer platform), it’s subjected to constant vibration and extreme heat cycles. Over two decades, internal components like capacitors and solder joints can degrade, leading to the unpredictable issues you’re likely experiencing.
This isn’t just a replacement part; it’s a complete solution. We take a quality, tested core and flash it with the latest official GM software calibrations specifically for your vehicle. This is a critical step that many sellers skip.
Why VIN Programming is Essential
Simply swapping a PCM from a junkyard vehicle will almost never work correctly. Your vehicle’s Vehicle Identification Number (VIN) contains specific information about its factory options, including:
- โ Engine size (e.g., 4.3L V6)
- โ Transmission type
- โ Axle gear ratio
- โ Tire size calibration
- โ Emissions equipment (Federal or California)
By programming this module to your exact VIN, we ensure all these parameters are set correctly. This means no follow-up trip to the dealer is required for programming, saving you time and hundreds of dollars in labor fees.
Guaranteed Compatibility and Simple Installation
This module is a direct replacement for several part numbers, including 16263494, 16265035, and 8162634940. While it’s the perfect fit for the 1998-2000 Blazer, Jimmy, and S10, it also fits a wide range of other GM trucks and vans from that era. Please verify your part number or consult the detailed fitment list to confirm compatibility.
Installation is straightforward for a DIYer with basic tools:
- Disconnect the negative battery terminal.
- Locate the PCM in the engine compartment.
- Carefully release the locking tabs and unplug the wiring harness connectors.
- Unbolt and remove the old module.
- Install the new module, reconnect the harnesses, and reconnect the battery.
After your purchase, simply send us your vehicle’s 17-digit VIN, and we’ll handle the programming before shipping it out. It will arrive at your door ready to install.