Is Your 1997 GM Truck or Van Running Rough?
If you’re dealing with frustrating issues like a persistent Check Engine Light, inexplicable stalling, poor fuel mileage, or harsh transmission shifting in your 1997 Chevrolet Tahoe, GMC Yukon, or other compatible GM vehicle, the root cause is often a failing Powertrain Control Module (PCM). As the central computer for your engine and transmission, a faulty PCM can create a cascade of performance problems that can be difficult to diagnose. This module, part number 16229684, is the direct-fit, reliable solution to restore your vehicle’s performance and dependability.
From the Diagnostic Bay
We had a 1997 GMC Suburban come into the shop with a classic ghost problem. The owner said it would randomly stall at stoplights, but not always. Sometimes it would hesitate badly on acceleration. We checked fuel pressure, sensors, and wiring, and everything seemed fine. No consistent trouble codes were stored, just a few random ones that didn’t point to a single component. After hours of diagnostics, we monitored the live data stream from the PCM and noticed the injector pulse width and timing signals were dropping out intermittently. We swapped in a known-good, correctly programmed PCM, and the truck ran perfectly. The original PCM had an internal failure that only showed up under specific operating conditions, a common end-of-life issue for these modules.
Symptoms of a Failing 1997 Tahoe PCM
A failing engine computer can manifest in various ways. If your vehicle is experiencing any of the following, it’s a strong indicator that your PCM may need replacement:
- ✔ Persistent and illuminated Check Engine Light (CEL)
- ✔ Engine stalling or cutting out for no apparent reason
- ✔ Rough or erratic idling
- ✔ Difficulty starting the engine, or a no-start condition
- ✔ Noticeable decrease in fuel economy
- ✔ Harsh or delayed automatic transmission shifting
- ✔ Failure to pass an emissions test
- ✔ Communication errors with diagnostic scan tools
The Simple, Programmed Solution
Don’t let a faulty computer keep your reliable truck off the road. We make the replacement process straightforward. This isn’t just a generic part off a shelf; it is a Powertrain Control Module prepared specifically for your vehicle. When you place your order, you provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians then use this VIN to flash the module with the latest, most stable software updates directly from General Motors. This ensures that the PCM has the correct calibration for your truck’s specific engine, transmission, and emissions equipment.
This critical programming step ensures compatibility and optimal performance, eliminating the need for an expensive trip to the dealership for programming. Once you receive the module, the physical installation is typically straightforward, located in the engine compartment for easy access.
Vehicle Compatibility
This electronic control module is a direct replacement for part numbers 16229684 and 8162296840. It is confirmed to fit the following 1997 model year vehicles:
- Astro / Safari (GMC)
- Blazer S10 / Jimmy S15 (4.3L)
- Bravada (4.3L)
- Chevrolet / GMC 1500, 2500, & 3500 Pickups (Gasoline)
- Express / Savana 1500, 2500, & 3500 Vans (Gasoline)
- Isuzu Hombre (4.3L)
- S10 / S15 / Sonoma (4.3L)
- Suburban 1500 & 2500 (Gasoline)
- Tahoe / Yukon (Gasoline)
Frequently Asked Questions
Do I need to program this 1997 Tahoe PCM?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during or after checkout, and we will load the correct GM-certified software for your specific configuration.
Where is the PCM located on my 1997 GM truck?
On most models like the Tahoe, Yukon, Suburban, and full-size pickups, the PCM is located in the engine compartment on the driver’s side, often near the battery or on the inner fender.
What is a CASE Relearn and is it required?
CASE (Crankshaft Angle Sensor Error) Relearn is a procedure that synchronizes the new PCM with the engine’s crankshaft position sensor. After installing the new module, this procedure is often necessary to prevent a P1336 trouble code and ensure accurate misfire detection. This must be performed with a compatible high-level scan tool and is a critical final step for proper engine operation.
Is this a simple plug-and-play installation?
It is a direct physical replacement, meaning the connectors will plug right in. However, because it’s a vital electronic component, a few steps are required. You must disconnect the battery before installation. After installation, you will likely need to perform the CASE Relearn procedure as mentioned above for the engine to run correctly.
How do I send you my VIN?
You can add your VIN in the notes section at checkout or reply to your order confirmation email with the 17-digit VIN. We cannot program and ship your module without it.