Restore Peak Performance to Your 1997 GM Truck or Van
Is your 1997 Chevy Express, GMC Savana, or C/K Pickup running poorly, stalling, or failing to start? The Powertrain Control Module (PCM), often called the engine’s brain, is a frequent cause of these frustrating issues. This vital component manages everything from fuel injection and spark timing to transmission shifting and emissions control. When it fails, it can bring your entire vehicle to a standstill. This replacement PCM, part number 16229684, is the definitive solution to get your reliable GM vehicle back on the road with confidence.
Unlike a generic part from a local store, this module is not just a simple replacement; it’s a complete, ready-to-install solution. We pre-program the unit using your vehicle’s unique Vehicle Identification Number (VIN). This critical step ensures that the module has the correct factory software and calibrations specific to your engine, transmission, and options. By loading the latest GM-authorized updates, we can often resolve underlying software glitches that may have contributed to the original failure, ensuring optimal performance and longevity.
From the Diagnostic Bay
We recently had a 1997 GMC Sierra 2500 towed to our shop. The owner said it would crank all day but wouldn’t fire up. He had already replaced the fuel pump and ignition coil with no success. Our initial scan showed no communication with the engine computer. After verifying power and ground at the module’s connector, we confirmed a failed PCM. Instead of a costly and time-consuming trip to the dealership, we installed one of our pre-programmed units. After performing the simple 10-minute security relearn procedure, the truck fired up on the first try and ran smoother than it had in years. The customer was thrilled to avoid a massive dealer bill and have his work truck back so quickly.
Diagnosing a Faulty 1997 Express 3500 PCM
A failing PCM can manifest in various ways, often mimicking other component failures. If you’re experiencing any of the following symptoms, a faulty engine computer could be the culprit. This module is the direct solution for these common problems.
Common Symptoms of PCM Failure
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, sputtering, or misfiring, especially under load.
- ✔ Complete no-start or very difficult hard-starting conditions.
- ✔ A significant, unexplained drop in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass state emissions testing.
- ✔ Inability for a diagnostic scan tool to communicate with the module.
Simple Installation, Lasting Results
This module is designed for a straightforward installation. Located in the engine bay (typically on the driver’s side near the battery), it can be swapped out with basic hand tools. The most crucial part of the process is providing us with your VIN when you order. This allows us to handle all the complex programming, so when the part arrives, it’s ready to be installed. For many of these 1997 GM vehicles, a simple security relearn procedure may be necessary after installation, which you can do yourself in your driveway—no special tools required. This plug-and-play approach saves you from towing your vehicle to a dealership and paying for expensive programming services.
This PCM is a direct fit for a wide range of popular 1997 GM models, including the Chevrolet Express 1500/2500/3500, GMC Savana, Chevy and GMC C/K Pickups, Tahoe, Yukon, Suburban, S10/Sonoma, and more. Please verify your part number (16229684 or 8162296840) and check the detailed fitment list to ensure compatibility.
Frequently Asked Questions
Do I need to get this PCM programmed by a dealer?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready to install with the latest GM software for your specific vehicle.
Where is the PCM located on my 1997 GM truck or van?
On most 1997 GM full-size trucks, vans, and SUVs, the PCM is located in the engine compartment on the driver’s side, often near the battery or firewall. For S-series trucks and vans like the Astro/Safari, it’s also on the driver’s side front, by the battery.
What is the security relearn procedure?
After installation, you may need to perform a simple key-cycle relearn to sync the new PCM with your vehicle’s anti-theft system. The typical procedure is to turn the key to the ‘ON’ position (without starting) for 10-12 minutes, then ‘OFF’ for 10 seconds. Repeat this process three times. The vehicle should then start and run normally.
How do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this part compatible with part number 8162296840?
Yes, this module is a direct, compatible replacement for original part numbers 16229684 and 8162296840.