Is Your 1997 GM Truck or Van Running Rough?
If your trusty 1997 Chevrolet 1500, GMC Sierra, Tahoe, or Suburban is suddenly stalling, shifting erratically, or showing a persistent Check Engine Light, the problem may lie deep within its electronic heart: the Powertrain Control Module (PCM). As the central computer, the PCM manages everything from fuel injection and ignition timing to transmission shift points. When it begins to fail, it can cause a cascade of frustrating and hard-to-diagnose issues. Don’t let a faulty computer sideline your vehicle. This direct-fit replacement PCM, part number 16229684, is the reliable solution to restore your vehicle’s performance and dependability.
From the Diagnostic Bay
We had a ’97 GMC Yukon come into the shop that was driving the owner crazy. It would start fine cold, but after 15 minutes of driving, it would start to buck and surge, eventually stalling at stoplights. The check engine light was on with a random misfire code that wouldn’t point to a specific cylinder. We checked the fuel pressure, ignition system, and sensors—all tested fine. After exhausting the usual suspects, we hooked up a scope to the PCM outputs for the injectors. We saw the signal for injector #3 dropping out intermittently as the engine warmed up. The problem wasn’t the injector; it was the driver inside the PCM failing under heat. We installed a VIN-programmed replacement module, and the Yukon ran like it just rolled off the assembly line. It’s a classic example of how a failing 1997 Chevrolet 1500 PCM can mimic a dozen other problems.
Why Choose Our Programmed 1997 Chevrolet 1500 PCM?
This isn’t just a generic part off a shelf. We provide a comprehensive, plug-and-play solution tailored specifically to your vehicle. When you order, you provide us with your vehicle’s VIN. Our technicians then flash the module with the latest GM-certified software and calibrations for your exact make, model, and engine configuration. This critical step ensures that the new PCM communicates flawlessly with all other modules and sensors in your truck, eliminating compatibility issues and the need for expensive dealership programming.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ A noticeable decrease in fuel economy.
- ✔ The engine cranks but refuses to start (no-start condition).
- ✔ Failure to pass emissions testing.
- ✔ Communication errors with diagnostic scan tools.
Guaranteed Fitment and Compatibility
This Electronic Control Module is a direct replacement for part number 16229684 and 8162296840. It is designed to fit a wide range of 1997 General Motors trucks and vans, ensuring a perfect match for your vehicle. Key compatible models include:
- 1997 Chevrolet 1500, 2500, & 3500 Pickups (Gasoline)
- 1997 GMC 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)
- 1997 Chevrolet S10, GMC Sonoma, Blazer, & Jimmy (4.3L V6)
- 1997 Oldsmobile Bravada (4.3L V6)
- 1997 Chevrolet Astro & GMC Safari (4.3L V6)
- 1997 Isuzu Hombre (4.3L V6)
By ordering this pre-programmed 1997 Chevrolet 1500 PCM, you are getting a component that is ready for installation right out of the box, saving you time, money, and the hassle of a trip to the dealer.
Frequently Asked Questions
Do I need to do any programming after I receive this PCM?
No. We program the module to your vehicle’s specific VIN before shipping. In most cases, it is a direct plug-and-play installation. However, some vehicles may require a security relearn procedure (also known as a CASE relearn), which can typically be done without special tools. Instructions for this simple procedure are included.
Where is the PCM located on my 1997 GM truck?
On most 1997 GM full-size trucks and SUVs (like the C/K 1500, Tahoe, Suburban), the PCM is located in the engine compartment on the driver’s side, near the firewall or inner fender. On S-series trucks and Astro/Safari vans, it is typically on the driver’s side near the battery tray.
How do I provide my 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, as the programming is essential for the part to function correctly.
Will this fix my transmission shifting problems?
The PCM controls the electronic functions of the transmission, including shift points and line pressure. If your shifting problems are caused by a faulty computer, this part will resolve them. However, it will not fix internal mechanical issues within the transmission itself. It’s always best to have a proper diagnosis, but a faulty PCM is a very common cause of electronic transmission issues.
Is this a new or used part?
This is a high-quality, inspected, and tested original equipment component that has been restored to full functionality. Each unit undergoes a rigorous process to ensure it meets or exceeds OEM specifications for performance and longevity.