Is your 1997 Chevrolet Astro or GM truck giving you headaches? If you’re dealing with frustrating issues like a no-start condition, a rough or stalling engine, poor fuel economy, or a persistent Check Engine Light, the problem often traces back to a failing Powertrain Control Module (PCM). As the electronic brain of your vehicle, a faulty PCM can cause a wide range of performance problems that can be difficult to diagnose. Stop chasing symptoms and get to the root of the problem with a reliable, correctly programmed replacement.
This isn’t just a part in a box; it’s a complete solution. We provide a high-quality replacement PCM, part number 8162296840 (also compatible with 16229684), that is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the module communicates perfectly with your engine, transmission, and other onboard systems. We load it with the latest GM factory software updates, which can often resolve drivability issues that were present even when the vehicle was new. The result is restored performance, reliability, and peace of mind.
Case Study: A Tricky Diagnosis
I remember a 1997 GMC Safari (which uses the same platform as the Astro) that came into my shop with an intermittent no-start and random stalling. The owner had already replaced the fuel pump and ignition coil with no success. The diagnostic codes were all over the place—random misfires, communication errors—but nothing pointed directly to one component. After confirming fuel pressure and spark were good during a ‘no-start’ event, I focused on the 1997 Astro PCM. On these older GM vehicles, the internal drivers for the injectors or ignition system can develop micro-fractures from years of heat cycles. We swapped in a VIN-programmed PCM, and the van fired up instantly and ran perfectly. It’s a classic failure mode I’ve seen dozens of times, and a correctly programmed module is the only surefire fix.
Is Your Vehicle Showing These Symptoms?
- ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or other communication faults.
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained stalling, especially when coming to a stop or at idle.
- ✔ Rough running, engine misfires, or hesitation during acceleration.
- ✔ Noticeably poor fuel mileage.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass an emissions or smog test.
A Straightforward Guide to Installation
Replacing the 1997 Astro PCM is a job most DIYers can handle with basic tools. Our pre-programming service eliminates the need for expensive dealer-level scan tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On most of these vehicles, the PCM is located in the engine compartment, on the driver’s side, often near the battery or on the inner fender.
- Disconnect the Connectors: Carefully unclip the wiring harness connectors from the old PCM. These may have locking tabs that need to be released. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the PCM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Bolt your new, pre-programmed PCM into the mounting bracket.
- Reconnect Everything: Firmly plug the wiring harness connectors into the new PCM until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: Your vehicle may require a simple security relearn procedure to recognize the new PCM. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Instructions will be included with your part.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of 1997 General Motors trucks, vans, and SUVs. Please verify your vehicle is on this list to ensure proper fitment.
- ✔ 1997 Astro / Safari (GMC)
- ✔ 1997 Blazer S10 / Jimmy S15 (4.3L)
- ✔ 1997 Bravada (4.3L)
- ✔ 1997 Chevrolet / GMC C/K 1500, 2500, 3500 Pickup (Gasoline)
- ✔ 1997 Express / Savana 1500, 2500, 3500 Van (Gasoline)
- ✔ 1997 Isuzu Hombre (4.3L)
- ✔ 1997 S10 / S15 / Sonoma (4.3L)
- ✔ 1997 Suburban 1500 / 2500 (Gasoline)
- ✔ 1997 Tahoe / Yukon (Gasoline)
Frequently Asked Questions
What do I need to do after I purchase?
After you place your order, you must send us your vehicle’s 17-digit VIN. We cannot program and ship your module without it. You can typically find the VIN on your driver’s side dashboard (viewable through the windshield) or on your vehicle’s registration or insurance card.
Is this part difficult to install?
No, this is a plug-and-play part. Because we program it for you, no further programming is required. You will only need basic hand tools to swap the module and may need to perform a simple security relearn procedure, which takes about 10-15 minutes and requires only your car key.
Will this fix my vehicle’s problem for sure?
This PCM is a direct solution for a failed module. While it resolves the vast majority of the symptoms listed above, we always recommend proper vehicle diagnosis. Ensure that other components like the fuel pump, ignition system, and wiring are in good working order.
What if my part number is slightly different?
This module is a direct replacement for service numbers 8162296840 and 16229684. As long as your vehicle is on the compatibility list, this module will function correctly once programmed to your VIN.
Do I need to send my old PCM back?
There is no core charge for this part. You do not need to return your old, failed module to us.