Is your 1997 Chevrolet Express 1500 Van running rough, stalling unexpectedly, or showing a persistent Check Engine Light? As a technician with over two decades of experience, I’ve seen these symptoms countless times, and they often point directly to a failing Powertrain Control Module (PCM). This isn’t just a part; it’s the operational brain of your vehicle’s engine and transmission. When it falters, everything from fuel economy to shift quality can suffer, leaving you frustrated and potentially stranded.
We’re offering a reliable, direct-fit solution. This PCM, compatible with part numbers 16229684 and 8162296840, is the definitive fix for these complex electronic issues. The biggest hurdle with PCM replacement has always been the expensive and time-consuming programming required at a dealership. We eliminate that problem entirely. Simply provide your vehicle’s VIN at checkout, and my team will program the module with the latest GM software updates specific to your van. It arrives at your door ready for a straightforward installation, getting you back on the road without the dealership hassle.
From the Diagnostic Bay: The Phantom Misfire Case
A few months back, a 1997 GMC Safari van came into my shop. The owner had spent a small fortune chasing a random misfire code (P0300). He’d replaced plugs, wires, the cap, and the rotor—all the usual suspects. Yet, the van still bucked and hesitated under load. After connecting my scope, I noticed the injector pulse width was erratic on several cylinders. The problem wasn’t the ignition or fuel components; the driver circuits inside the original PCM were failing intermittently. It’s a classic example of how a faulty 1997 Express 1500 Van PCM (the same family of modules) can send you down a rabbit hole of expensive, unnecessary repairs. We installed a VIN-programmed module, and the van ran perfectly smooth on the first test drive. This part doesn’t just fix a code; it restores the vehicle’s core functionality.
Common Signs of a Failing PCM
If you’re experiencing any of the following, a faulty engine computer is a likely culprit. A failing module can cause a wide range of problems that may seem unrelated.
- ✔ Check Engine Light is on with codes like P0601 (Internal Memory Error) or P0606 (PCM Processor Fault).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drops in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Engine stalling, sputtering, or hesitating during acceleration.
- ✔ Failure to pass state emissions testing.
A Straightforward Guide to Installation
Replacing the PCM on these GM vans and trucks is a job most DIYers can handle in under an hour with basic hand tools. Since we program it beforehand, there are no complex steps.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental contact.
- Locate the PCM: On most of these models, the PCM is located in the engine compartment on the driver’s side, often near the battery or on the fender well.
- Disconnect the Connectors: Carefully unclip the wiring harness connectors from the old module. They have locking tabs that may need to be gently pried up. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the PCM from its mounting bracket. There are typically a few 10mm or 7mm bolts holding it in place.
- Install the New PCM: Mount your new, pre-programmed module onto the bracket and secure the bolts.
- Reconnect Everything: Firmly plug the wiring harnesses into the new PCM until they click into place. Reconnect the negative battery terminal.
- Final Step: Start the engine. It may take a moment to idle smoothly as the system relearns. Your Check Engine Light should be off, and performance restored.
Will This Fit My Vehicle?
This Electronic Control Module is guaranteed to be compatible with the following 1997 gasoline-engine models. Please verify your vehicle is on this list to ensure proper fitment.
BLAZER S10/JIMMY S15 97 (6-262, 4.3L)
BRAVADA 97 (6-262, 4.3L)
CHEVROLET 1500 PICKUP 97 (gasoline, LH front engine compartment)
CHEVROLET 2500 PICKUP 97 (gasoline, LH front engine compartment)
CHEVROLET 3500 PICKUP 97 (gasoline, LH front engine compartment)
EXPRESS 1500 VAN 97
EXPRESS 2500 VAN 97 (gasoline)
EXPRESS 3500 VAN 97 (gasoline)
GMC 1500 PICKUP 97 (gasoline, LH front engine compartment)
GMC 2500 PICKUP 97 (gasoline, LH front engine compartment)
GMC 3500 PICKUP 97 (gasoline, LH front engine compartment)
ISUZU HOMBRE 97 (4.3L, 6 cylinder)
S10/S15/SONOMA 97 (6-262, 4.3L)
SAFARI (GMC) 97 (LH front by battery)
SAVANA 1500 VAN 97
SAVANA 2500 VAN 97 (gasoline)
SAVANA 3500 VAN 97 (gasoline)
SUBURBAN 1500 97 (gasoline, LH front engine compartment)
SUBURBAN 2500 97 (gasoline, LH front engine compartment)
TAHOE 97 (gasoline, LH front engine compartment)
YUKON 97 (gasoline, LH front engine compartment)
Frequently Asked Questions
How do I provide my VIN number?
After you complete your purchase, you will receive an email with instructions on where to send your VIN. You can also add your VIN to the ‘notes’ section during checkout. We cannot ship the module until we receive your VIN.
Is this part truly ‘plug and play’?
Yes. Because we program the module to your specific VIN before shipping, it will not require any additional programming or dealer intervention. Simply install it, and you’re ready to go.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls both engine and transmission functions. If the module is faulty, it can cause erratic shifting, which this replacement part will correct. However, this will not fix internal mechanical issues with the transmission.
What if my part number isn’t an exact match but my vehicle is on the list?
This module is a direct replacement for part numbers 16229684 and 8162296840. As long as your vehicle is a 1997 model listed above and has a gasoline engine, this VIN-programmed unit is the correct replacement, even if your original part number differs slightly due to production changes.