Restore Your Van’s Performance and Reliability
Is your 1997 GMC Safari or Astro van acting up? Experiencing frustrating issues like intermittent stalling, a persistent check engine light, or a complete no-start condition? As a technician with over two decades of experience, I’ve seen these symptoms countless times, and they often point directly to a failing Powertrain Control Module (PCM). This isn’t just an inconvenience; it’s the brain of your engine, and when it falters, your vehicle’s reliability is compromised. This replacement PCM is the definitive solution, arriving pre-programmed with the latest GM software updates tailored specifically to your vehicle’s VIN.
A Technician’s Notebook: The Ghost in the Machine
I remember a 1997 Chevy Astro that came into my shop a few years back. The owner was at his wit’s end. The van would run perfectly for days, then suddenly die at a stoplight and refuse to restart for an hour. No consistent codes were stored, just a few random communication errors. We checked fuel pressure, spark, and all the usual suspects—everything seemed fine. On a hunch, I tapped the PCM connector while the engine was idling, and it sputtered. That was the clue. The internal circuit board had developed microscopic cracks from years of heat cycles and vibration, causing intermittent failures. A new, programmed 1997 GMC Safari PCM like this one solved the problem instantly, and that van is still a reliable workhorse for its owner today.
Is Your Vehicle Showing These Telltale Signs?
A failing PCM can cause a wide range of confusing symptoms. If you’re noticing any of the following, this module is the likely fix you’ve been looking for. These issues are especially common in the GM 4.3L V6 platform.
- ✔ Engine cranks but will not start.
- ✔ Unexplained Check Engine Light (CEL) illumination, sometimes with codes like P0601 or P0606 (Internal Control Module Memory Check Sum Error).
- ✔ Poor or erratic automatic transmission shifting.
- ✔ Drastic decrease in fuel economy.
- ✔ Intermittent stalling or rough idling.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Apparent loss of spark or fuel injector pulse.
A Straightforward Guide to Installation
One of the biggest advantages of this module is that it arrives ready to install, with no dealership visit required for programming. The physical swap is simple and can be done with basic hand tools in your own driveway.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the PCM: On most compatible vehicles like the Safari, Astro, S10, and pickups, the PCM is located in the engine compartment, typically on the driver’s side near the battery or firewall.
- Disconnect the Connectors: Carefully unclip and remove the electrical wiring harness connectors from the old PCM. Inspect them for any corrosion or damage.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely re-fasten the bolts.
- Reconnect and Finalize: Plug the wiring harnesses firmly into the new module. Reconnect your battery’s negative terminal. Your vehicle is now ready to start. It may take a few drive cycles for the computer to complete all of its self-tests.
Verified Vehicle Compatibility
This module, part number 16229684 (also replaces 8162296840), is a direct-fit replacement for a wide range of 1997 General Motors vehicles. Please provide your VIN upon purchase to ensure perfect programming for your specific model and options.
- ✔ 1997 GMC Safari / Chevrolet Astro (LH front by battery)
- ✔ 1997 Chevrolet S10 / GMC Sonoma (4.3L V6)
- ✔ 1997 Chevrolet Blazer / GMC Jimmy (4.3L V6)
- ✔ 1997 Oldsmobile Bravada (4.3L V6)
- ✔ 1997 Isuzu Hombre (4.3L V6)
- ✔ 1997 Chevrolet / GMC C/K 1500, 2500, 3500 Pickups (Gasoline)
- ✔ 1997 Chevrolet Tahoe / GMC Yukon (Gasoline)
- ✔ 1997 Chevrolet / GMC Suburban 1500, 2500 (Gasoline)
- ✔ 1997 Chevrolet Express / GMC Savana 1500, 2500, 3500 Vans (Gasoline)
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming for you before shipment. Using the VIN you provide, we flash the module with the latest official GM software for your exact vehicle. It arrives ready for plug-and-play installation.
Where do I provide my vehicle’s VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information.
Will this fix my vehicle’s security system (Passlock/VATS)?
In many cases, a faulty PCM can cause security system issues. However, some GM vehicles of this era may require a simple security relearn procedure after installation, which typically involves turning the key on for 10-15 minutes. Instructions can be easily found online for your specific model.
Is this a used part?
This is a high-quality, inspected, and tested replacement part that is guaranteed to function correctly. It is not a new part from the dealer, but it is programmed with the newest software available, often making it a more reliable choice than a new old-stock unit.
What if my part number is slightly different?
This module, 16229684, is also a direct replacement for part number 8162296840. If your original module has one of these numbers, this part is compatible. Our VIN programming ensures it works correctly, regardless of the original calibration.