Is Your ’97 GM Truck or Van Suddenly Unreliable?
If you’re driving a 1997 GM truck or van, you know it’s a workhorse. But when the brain of the operation—the Powertrain Control Module (PCM)—starts to fail, that reliability vanishes. I’ve spent two decades under the hoods of these exact vehicles, and the symptoms are always frustratingly familiar: the engine cranks but won’t start, it stalls randomly at a stoplight, the transmission shifts erratically, or the Check Engine Light is on with codes that just don’t make sense. You’re left with a vehicle you can’t trust, and that’s a problem.
These issues often point directly to a failing PCM, also known as the Engine Control Unit (ECU). Located in the engine bay, usually on the driver’s side by the battery or firewall, this module is constantly subjected to heat, vibration, and the elements. Over 25+ years, internal electronic components like capacitors and processors can degrade, leading to the intermittent and confusing problems you’re experiencing.
Expert Pro Tip: Check Your Grounds First!
Before you condemn your PCM, do yourself a favor and check the main engine and body grounds. On these GMT400-era trucks, a corroded or loose ground strap can cause voltage drops that mimic a faulty computer. I’ve seen it dozens of times in my shop—a 10-minute fix with a wire brush and a wrench can save you a lot of diagnostic headaches. A good ground path is essential for the PCM to function correctly. If your grounds are clean and tight and the problems persist, the PCM is your most likely culprit.
The Direct, Hassle-Free Solution
This isn’t just a replacement part; it’s a complete solution. This PCM, compatible with service number 16229684 (and interchangeable with 8162296840), is the definitive fix for your truck’s electronic woes. What sets our modules apart is our expert programming service. We don’t just ship you a box; we prepare the module specifically for your vehicle.
What “VIN Programmed” Means for You:
- âś” No Extra Tools or Dealer Visits: When your PCM arrives, it’s already been flashed with the latest official GM software calibration for your specific Vehicle Identification Number (VIN).
- âś” Plug-and-Play Installation: The process is straightforward. Disconnect the battery, unplug the old module, install the new one, and reconnect the battery. In most cases, you’re ready to go. Some vehicles may require a simple security relearn procedure, which can be done without any special tools.
- âś” Restored Performance: Flashing the latest software corrects many factory bugs and improves parameters for engine performance, transmission shifting, and fuel efficiency.
Guaranteed Compatibility
We guarantee this module is the correct fit for the following 1997 models. As a technician, I know how critical it is to match the part number and application, and we’ve done the work to ensure this part works for you.
- âś” Chevrolet Pickups (1500, 2500, 3500): Gasoline models with the ECM in the LH front engine compartment.
- âś” GMC Pickups (1500, 2500, 3500): Gasoline models with the ECM in the LH front engine compartment.
- âś” Chevy/GMC Vans (Express, Savana 1500/2500/3500): Gasoline models.
- âś” Chevy/GMC SUVs (Tahoe, Yukon, Suburban 1500/2500): Gasoline models.
- âś” Chevy/GMC Mid-Size (S10/S15/Sonoma, Blazer/Jimmy): Models with the 4.3L (6-262) V6 engine.
- âś” Chevy/GMC Vans (Astro, Safari): Models with the ECM by the LH front battery.
- âś” Oldsmobile Bravada: Models with the 4.3L (6-262) V6 engine.
- âś” Isuzu Hombre: Models with the 4.3L V6 engine.
After your purchase, simply provide us with your vehicle’s VIN. Our technicians will handle the programming, ensuring the module that arrives at your door is ready to be installed, solving your problems and getting your trusted GM vehicle back on the road.