Is Your 1997 GM Truck or Van Running Rough?
If your 1997 Chevrolet Express 2500, GMC Savana, or another compatible GM vehicle is experiencing perplexing issues like stalling, erratic shifting, a persistent Check Engine Light, or a complete no-start condition, the problem may lie with its electronic brain: the Powertrain Control Module (PCM). As the central command center for your engine and transmission, a failing PCM can cause a cascade of problems that are often difficult to diagnose. Don’t let a faulty computer keep your reliable workhorse off the road. This direct-replacement PCM, part number 16229684, is the definitive solution to restore your vehicle’s performance, efficiency, and dependability.
From the Diagnostic Bay
We had a 1997 Chevy K1500 in the shop that was driving its owner crazy. It would start and run perfectly fine for days, then suddenly stall at a stoplight and refuse to restart for an hour. There were no consistent trouble codes, and the fuel pressure and spark were good during testing. After chasing our tails checking sensors and wiring, we hooked up a scope to the PCM outputs. We discovered the injector control signal would randomly drop out. We swapped in a pre-programmed PCM, and the truck never stalled again. It was a classic case of an internal module failure that only showed up when it was hot, a common issue for these older units.
Symptoms of a Failing PCM
- ✔ Check Engine Light is on with various communication or sensor codes.
- ✔ Engine cranks but refuses to start.
- ✔ Rough or unstable idling.
- ✔ Unexplained stalling or hesitation during acceleration.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass an emissions test.
The Plug-and-Play Solution: Your 1997 Express 2500 PCM
Getting your vehicle back to factory-spec operation shouldn’t be a complicated ordeal. Our process is designed to be simple and effective. When you order this PCM, you provide us with your vehicle’s 17-digit VIN. Our technicians then use that information to load the latest, most stable GM-certified software directly onto the module. This isn’t a generic, one-size-fits-all part; it’s a component specifically prepared for your vehicle’s exact configuration, including its engine, transmission, and emissions equipment. This VIN-specific programming ensures that once you receive the module, it’s ready for a straightforward installation without the need for an expensive trip to the dealership for programming.
This module is a direct replacement for original part numbers 16229684 and 8162296840 and fits a wide range of popular 1997 GM trucks and vans, including the Chevrolet Silverado, GMC Sierra, Tahoe, Yukon, S10/Sonoma, and many others. Please verify the part number and check the full compatibility list to ensure a perfect fit for your vehicle.
Frequently Asked Questions
Do I need to send my old PCM in?
No, there is no core charge or need to return your original module. This is a direct purchase, which simplifies the process and gets your vehicle repaired faster.
Is this module difficult to install?
Installation is generally straightforward for someone with basic mechanical skills. The PCM is typically located in the engine bay. You will need to disconnect the battery, unplug the electrical connectors, and unbolt the old module. Then, simply bolt the new one in its place and reconnect everything. The process usually takes less than an hour.
What is a security or CASE relearn?
After installation, some GM vehicles require a security relearn procedure to sync the new PCM with the vehicle’s anti-theft system. This can often be done without special tools by following a simple key-cycling procedure (e.g., turning the key to ‘ON’ for 10 minutes, then ‘OFF’, and repeating three times). A Crankshaft Variation Relearn (CASE) may also be needed to clear certain trouble codes, which typically requires a professional scan tool.
How do I provide my VIN?
After completing your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot program and ship your module until we receive this information, so please provide it promptly to avoid delays.
Will this fix my vehicle’s problem for sure?
This PCM will correct any issues directly caused by a faulty module. However, it’s crucial to ensure your vehicle has been properly diagnosed. This part will not fix problems related to bad sensors, faulty wiring, or mechanical failures. If you are uncertain, we recommend consulting with a qualified automotive technician.