Restore Peak Performance to Your GM Vehicle
Is your 1999-2001 GMC Safari, Chevy Astro, S10, or another compatible GM truck or van suffering from perplexing engine issues? Symptoms like a persistent check engine light, rough idling, stalling, poor fuel economy, or erratic transmission shifting often point to a failing Powertrain Control Module (PCM). As the central computer for your engine and transmission, the PCM’s health is critical for your vehicle’s reliability and performance. This replacement PCM, part number 16265035, is the definitive solution to restore your vehicle’s original functionality and driving characteristics.
From the Diagnostic Bay
We once had a 2000 Chevy Express van come into the shop with an intermittent no-start condition that was driving the owner crazy. He had already replaced the battery, alternator, and even the fuel pump, but the problem persisted. When we connected our diagnostic scanner, we noticed intermittent communication loss with the PCM. After checking the wiring and connectors, we pinpointed the internal circuitry of the original module as the culprit. Instead of a costly trip to the dealership, we installed a VIN-programmed PCM just like this one. The van started reliably every time, and the communication issues were gone. It’s a classic case where what seems like a mechanical failure is actually an electronic one, and having a reliable, correctly programmed module is the key to a lasting fix.
Is Your Vehicle Exhibiting These Symptoms?
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your engine computer may need replacement:
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Rough or unstable engine idle.
- ✔ Harsh or delayed automatic transmission shifts.
- ✔ Failure to pass emissions testing.
- ✔ Communication errors with diagnostic scan tools.
The Perfect Solution: A Programmed 1999-2001 GMC Safari PCM
Don’t let a faulty computer keep your reliable GM truck or van off the road. This module is a direct-fit replacement for a wide range of vehicles, including the GMC Safari, Chevrolet Astro, S10/Sonoma, Silverado/Sierra, and Express/Savana vans. Our key service is providing a module that is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN). This ensures complete compatibility with your vehicle’s factory settings and options. We install the latest GM-released software updates, which can often resolve underlying drivability issues that were present even when the vehicle was new. This means you receive a part that is not just a replacement, but a functional improvement over the original.
The process is simple: after you complete your purchase, you provide us with your vehicle’s VIN. Our technicians will then flash the module, making it ready for installation right out of the box. For many vehicles, this is a plug-and-play solution, though some models may require a simple security relearn procedure (often called a CASE relearn or anti-theft relearn), which can typically be done without special tools. This service saves you hundreds of dollars and the hassle of having your vehicle towed to a dealership for programming.
This unit is a direct replacement for part numbers: 16263494, 16265035, 8162634940, 218-11787, and 21811787. Verify your part number and check the extensive fitment list to ensure compatibility.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls critical engine and transmission functions, such as fuel mixture, ignition timing, and transmission shift points, to ensure optimal performance, fuel economy, and emissions.
Is this part truly plug-and-play?
Because we program the module to your specific VIN, it is ready for installation upon arrival. For many of the listed vehicles, it is a direct plug-and-play installation. Some vehicles may require a security relearn procedure, which is a simple process you can often do yourself. Instructions can be readily found online for your specific model.
How do I provide my VIN?
After you place your order, you will receive instructions on how to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it.
Where is the PCM located on my vehicle?
The location varies by model. On GMC Safari and Chevy Astro vans, it’s typically on the driver’s side of the engine compartment, near the battery. On S10/Sonoma pickups, it’s often on the passenger’s side firewall. For full-size trucks and vans, it can be on the driver’s side inner fender or near the rear of the engine compartment. Always disconnect the battery before removal or installation.
Will this fix my specific problem?
This PCM is a direct solution for a failed module. While it resolves the common symptoms listed, we always recommend a proper diagnosis by a qualified mechanic to confirm the PCM is the root cause of your issue before ordering.