Is Your 1997 GM Truck or Van Running Poorly? The PCM Might Be the Culprit.
If you’re dealing with frustrating issues like stalling, a persistent check engine light, poor fuel economy, or even a no-start condition in your 1997 Chevrolet, GMC, Oldsmobile, or Isuzu vehicle, a failing Powertrain Control Module (PCM) is a very common cause. As the central computer for your engine and transmission, its proper function is critical. When it begins to fail, it can create a cascade of problems that are difficult to diagnose. This replacement PCM, part number 8162296840, is the definitive solution to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
A customer brought in their ’97 Tahoe that would crank but not start. They had already replaced the fuel pump and ignition coil with no luck. After connecting our scan tool, we found there was no communication with the engine computer. We checked the powers and grounds at the PCM connectors, and they were all good. This pointed directly to an internal failure of the module itself. We installed one of our pre-programmed units, performed the quick security relearn, and the truck fired right up and ran perfectly. It’s a classic failure on these GMT400 platform vehicles.
The Simple, Reliable Solution: A VIN-Programmed 1997 GM PCM
Don’t waste time and money chasing down phantom issues or installing a generic module from a junkyard that won’t work with your specific vehicle. We take the guesswork out of the repair. This module is not just a replacement part; it’s a complete solution. When you place your order, you provide us with your vehicle’s 17-digit VIN. Our technicians then use that information to flash the module with the latest, most stable GM-certified software for your exact make, model, and engine configuration. This ensures complete compatibility and optimal performance, right out of the box.
Common Symptoms of a Failing 1997 GM PCM
- ✔ Check Engine Light: The light is on, and you may see communication error codes like U-codes or P-codes related to module performance.
- ✔ No-Start or Hard Starting: The engine cranks but refuses to start, or takes an excessively long time to fire up.
- ✔ Engine Stalling: The engine randomly shuts off while driving or when coming to a stop.
- ✔ Poor Performance & Fuel Economy: You may notice a significant drop in power, hesitation during acceleration, and worse gas mileage.
- ✔ Erratic Transmission Shifting: The transmission may shift harshly, at the wrong times, or not at all, as the PCM also controls its functions.
- ✔ Intermittent Issues: Problems may appear randomly and be difficult to reproduce, often getting worse in very hot or cold weather.
Installation is Straightforward
Replacing the PCM is a job most DIY mechanics can handle. The module is typically located in the engine bay on the driver’s side, near the battery. After disconnecting the battery, you simply unplug the electrical connectors, unbolt the old module, and install the new one. Once installed, you will likely need to perform a simple security relearn procedure (often called VATS or Passlock relearn) which requires no special tools and typically involves cycling the ignition key. Instructions for this procedure are readily available online or in service manuals.
Guaranteed Fitment for Your Vehicle
This Powertrain Control Module is a direct replacement for part numbers 16229684 and 8162296840 and is confirmed to fit the following 1997 gasoline-engine vehicles:
- Astro / Safari (GMC)
- Blazer S10 / Jimmy S15 (4.3L)
- Bravada (4.3L)
- Chevrolet 1500/2500/3500 Pickup
- Express 1500/2500/3500 Van
- GMC 1500/2500/3500 Pickup
- Isuzu Hombre (4.3L)
- S10/S15/Sonoma (4.3L)
- Savana 1500/2500/3500 Van
- Suburban 1500/2500
- Tahoe / Yukon
Frequently Asked Questions
Is this module difficult to install?
No, installation is straightforward for most individuals with basic mechanical skills. It involves disconnecting the battery, unplugging the old module, and bolting the new one in its place. The only additional step is a simple security relearn procedure that requires only your ignition key.
How do I provide my VIN for programming?
You can enter your 17-digit Vehicle Identification Number (VIN) during the checkout process. If you miss it, you can also reply to your order confirmation email with the VIN, and our team will match it to your order.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this will resolve the issue. We recommend having your vehicle scanned for codes before ordering to help confirm the PCM is the point of failure.
What if my original part number is 16229684?
This module is a fully compatible replacement for part number 16229684. As long as your vehicle is on the fitment list, this part will function correctly once programmed to your VIN.
Is any additional programming required after I install it?
No. We handle all the primary programming before shipment. The only thing you may need to do is the security relearn procedure, which syncs the new PCM to your vehicle’s anti-theft system.