Restore Peak Performance to Your 1997 GM Truck or Van
Is your trusty 1997 Chevrolet Express 1500 Van, GMC Safari, or Chevy S10 suddenly giving you headaches? If you’re dealing with frustrating issues like intermittent stalling, a persistent Check Engine Light, poor fuel mileage, or a complete no-start condition, the problem often points directly to a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing everything from fuel delivery and ignition timing to transmission shifting. When it falters, the entire vehicle’s performance suffers.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the hassle and high cost out of the equation by pre-programming this module specifically for your vehicle using your VIN. This ensures it arrives with the latest GM software updates, restoring the precise operational parameters your engine and transmission need to function correctly. Forget about expensive towing fees or scheduling a costly programming appointment at a dealership—this module gets you back on the road with confidence.
Case Study: A Tricky Diagnosis
A few months back, a 1997 GMC Yukon was towed into my shop with a classic, frustrating complaint: it would run fine for days, then suddenly refuse to start. The owner had already replaced the battery and fuel pump. When I connected my scan tool, I found no communication with the PCM. After checking the power and ground circuits to the module, which were solid, I knew the issue was internal. These older PCMs are prone to solder joint fractures on the main board from years of heat cycles and vibration. The break becomes intermittent—sometimes making contact, sometimes not. We installed a pre-programmed module just like this one, and the Yukon has been starting reliably ever since. This simple swap saved the customer from chasing an electrical ghost for weeks.
Common Signs of a Failing PCM
- ✔ Unexplained Check Engine Light illumination
- ✔ Engine stalling, stumbling, or refusing to start
- ✔ Noticeable decrease in fuel economy
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Failure to pass emissions testing
- ✔ Diagnostic Trouble Codes (DTCs) such as P0601, P0605 (Internal Control Module Memory Error) or communication errors.
A Straightforward Guide to Installation
Replacing the PCM on these GM vehicles is a job most DIYers can handle in under an hour. The module is typically located in the engine compartment on the driver’s side.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the PCM: On most models like the Express Van or S10/Blazer, you’ll find it mounted near the battery or on the driver’s side inner fender.
- Disconnect the Harnesses: Carefully unclip and remove the electrical connectors from the old module. Inspect the connectors for any corrosion or damage.
- Swap the Modules: Unbolt the old PCM from its bracket and set it aside. Mount the new, pre-programmed module in its place and secure it.
- Reconnect Everything: Firmly plug the electrical harnesses into the new PCM. Reconnect the negative battery terminal.
- Perform Security Relearn (If Necessary): For vehicles with Passlock security, you may need to perform a simple 10-minute relearn procedure. Turn the key to the ‘ON’ position (don’t start) for 10 minutes, then turn it ‘OFF’ for 10 seconds. Repeat this two more times. On the fourth try, the vehicle should start.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of 1997 GM gasoline-powered vehicles. Please confirm your vehicle is on this list. It is compatible with original part numbers 16229684 and 8162296840.
- ✔ 1997 Astro / Safari (GMC)
- ✔ 1997 Blazer S10 / Jimmy S15 (4.3L)
- ✔ 1997 Bravada (4.3L)
- ✔ 1997 Chevrolet / GMC 1500, 2500, 3500 Pickup
- ✔ 1997 Express / Savana 1500, 2500, 3500 Van
- ✔ 1997 Isuzu Hombre (4.3L)
- ✔ 1997 S10 / S15 / Sonoma (4.3L)
- ✔ 1997 Suburban 1500 / 2500
- ✔ 1997 Tahoe / Yukon
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential. It allows us to access the specific GM database for your vehicle’s original configuration. We use it to load the correct software, including engine and transmission calibrations, and any factory updates. This ensures your new 1997 Express 1500 Van PCM works perfectly right out of the box.
Is this a simple plug-and-play installation?
Yes, for the vast majority of vehicles. Because we pre-program the module, you will not need a scan tool for programming. In some cases, you may need to perform a simple, tool-free “security relearn procedure” which takes about 30 minutes. We include instructions for this common step.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM also controls transmission functions, including shift points and line pressure. If your shifting issues are caused by a faulty module, this part is the correct solution. However, it will not fix internal mechanical failures within the transmission itself.
What if my original part number is not on the list?
The part numbers 16229684 and 8162296840 cover a wide range of applications. If your number is different, please contact us with your VIN and original part number before ordering. We can verify compatibility to ensure you receive the correct module for your truck or van.