Restore Your Truck’s Performance and Reliability
Is your trusty 1997 Chevrolet 1500, or another classic GM truck, giving you headaches? If you’re dealing with frustrating issues like stalling, a persistent check engine light, or a no-start condition, the problem often points directly to a failing Powertrain Control Module (PCM). As the electronic brain of your vehicle, the PCM controls everything from fuel delivery and ignition timing to transmission shifting. When it falters, your truck’s performance and reliability go with it. This replacement PCM is the definitive solution, arriving at your door fully programmed with the latest GM software updates, specifically matched to your vehicle’s VIN.
Case Study: A Tricky Diagnosis
I remember a 1997 GMC Yukon that came into my shop. The owner had already replaced the fuel pump and filter, chasing an intermittent stalling problem that only happened after it was driven for 20 minutes. No fuel pressure issues were found, but the problem persisted. After connecting a scope, we saw the injector pulse width signals become erratic right before it would stall. The culprit wasn’t the fuel system, but the PCM’s driver circuit overheating and failing. A simple swap with a pre-programmed module like this one had the Yukon running perfectly in under an hour, saving the owner from more wasted time and money on incorrect diagnoses.
Signs of a Failing PCM in Your GM Truck
A failing computer can mimic many other mechanical problems. Before you start replacing expensive sensors or fuel system components, see if your truck is exhibiting these classic PCM failure symptoms. A faulty 1997 Chevrolet 1500 PCM can be the root cause of many electrical gremlins.
- ✔ Engine stalls for no apparent reason, especially when warm.
- ✔ Vehicle will not start, but the battery and starter are good.
- ✔ Check Engine Light is on with PCM-related Diagnostic Trouble Codes (DTCs) like P0601, P0602, or P0606.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to communicate with a diagnostic scan tool.
- ✔ Issues passing an emissions test.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- ✔ Locate the PCM: On most of these 1997 GM trucks and vans, the PCM is located in the engine compartment on the driver’s side, often near the battery or firewall. It’s a silver metal box with multiple large wiring harness connectors.
- ✔ Disconnect the Harnesses: Carefully unclip and remove all wiring harnesses connected to the old module. Inspect the connectors for any corrosion or damaged pins.
- ✔ Swap the Module: Unbolt the old PCM from its mounting bracket and remove it. Secure the new, pre-programmed PCM in its place.
- ✔ Reconnect Everything: Firmly plug the wiring harnesses into the new module. Reconnect the negative battery terminal.
- ✔ Perform Security Relearn (If Necessary): For many GM vehicles of this era, you’ll need to perform a simple key-cycle security relearn. Turn the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds. Repeat this process 3 times. On the fourth try, the vehicle should start and run normally.
Will This Fit My Vehicle?
This module is a direct-fit replacement for a wide range of 1997 General Motors vehicles. Please verify your truck or van is on the list below. This part is compatible with original part numbers 16229684 and 8162296840.
- ASTRO VAN (LH front by battery)
- BLAZER S10/JIMMY S15 (6-262, 4.3L)
- BRAVADA (6-262, 4.3L)
- CHEVROLET 1500 / 2500 / 3500 PICKUP (Gasoline, LH front engine compartment)
- EXPRESS 1500 / 2500 / 3500 VAN (Gasoline)
- GMC 1500 / 2500 / 3500 PICKUP (Gasoline, LH front engine compartment)
- ISUZU HOMBRE (4.3L 6-cylinder)
- S10/S15/SONOMA (6-262, 4.3L)
- SAFARI (GMC) (LH front by battery)
- SAVANA 1500 / 2500 / 3500 VAN (Gasoline)
- SUBURBAN 1500 / 2500 (Gasoline, LH front engine compartment)
- TAHOE / YUKON (Gasoline, LH front engine compartment)
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software and calibrations specific to your truck’s engine, transmission, and options. This ensures perfect compatibility and function right out of the box, eliminating the need for an expensive trip to the dealership for programming.
Is this a simple plug-and-play installation?
Yes, for the most part. Because we pre-program the module, you just need to physically swap it with your old one. Some vehicles may require a simple ‘Security Relearn Procedure’ which involves cycling the key and can be done in your driveway without any special tools. We include instructions for this.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of your existing PCM (indicated by codes like P0601-P0606), then yes, this replacement module will resolve the issue. However, if the light is on due to a faulty sensor or other mechanical problem, you will still need to diagnose and fix that separate issue.
Do I need to send my old PCM back?
No core charge is required for this part. You can keep or responsibly dispose of your old module without needing to return it to us.