Is Your 1997 GM Truck or Van Running Rough?
If you’re dealing with frustrating issues like a persistent check engine light, poor engine performance, stalling, or erratic shifting in your 1997 Chevrolet Tahoe, GMC Yukon, or other compatible GM vehicle, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer, the PCM is responsible for managing everything from fuel delivery and ignition timing to transmission shift points. When it begins to fail, it can create a cascade of problems that are difficult to diagnose. This replacement PCM is the definitive solution to restore your vehicle’s performance and reliability.
The Brains of Your Operation: The 1997 Tahoe PCM
The PCM in your GMT400-platform truck or van is a critical component. It constantly analyzes data from sensors throughout your engine and transmission to make real-time adjustments. Over time, internal components can degrade from heat, vibration, and age, leading to faulty calculations and poor performance. Our replacement units are meticulously prepared and programmed with the latest GM-certified software updates specifically for your vehicle’s VIN. This ensures optimal performance, fuel efficiency, and seamless communication between all your vehicle’s systems, just as the factory intended.
From the Diagnostic Bay
We had a ’97 Suburban come into the shop with an intermittent no-start condition that was driving the owner crazy. It would run fine for days, then suddenly refuse to start. There were no consistent trouble codes, just a general communication error that would pop up occasionally. After checking all the wiring and grounds, we swapped in a test PCM. The problem vanished instantly. The original module had an internal hairline crack on the circuit board that would separate when the engine bay temperature changed, cutting power to the fuel pump relay. A new, properly programmed PCM had the customer back on the road permanently in under an hour.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Engine stalling or cutting out unexpectedly while driving.
- ✔ Difficulty starting the engine, or a complete no-start condition.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The engine runs rough, misfires, or hesitates on acceleration.
- ✔ Failure to pass state emissions testing.
A True Plug-and-Play Solution
Don’t waste time and money at a dealership on expensive diagnostics and programming fees. We take the guesswork out of the repair. Simply provide us with your vehicle’s VIN during checkout, and we will program this module for you before it ships. Installation is straightforward for any DIY mechanic. It’s located in the engine bay and is typically held in by a few bolts with easy-to-access electrical connectors. Once installed, your vehicle will have the correct software to operate at peak efficiency. In some cases, a simple security relearn procedure may be required, which can be done without special tools.
This module is a direct replacement for part numbers 16229684 and 8162296840, and it fits a wide range of popular 1997 GM models, including:
- Chevrolet Tahoe & GMC Yukon
- Chevrolet & GMC Suburban (1500 & 2500)
- Chevrolet & GMC C/K Pickups (1500, 2500, 3500)
- Chevrolet Express & GMC Savana Vans (1500, 2500, 3500)
- Chevrolet S10, GMC Sonoma, Oldsmobile Bravada, Isuzu Hombre (4.3L V6)
- Chevrolet Astro & GMC Safari Vans
Restore your vehicle’s performance and dependability today. By choosing our pre-programmed 1997 Tahoe PCM, you’re getting a reliable, cost-effective solution that gets you back on the road fast.
Frequently Asked Questions
Do I need to have this PCM programmed?
No. This PCM comes fully programmed to your vehicle’s specific VIN before we ship it. It is ready to install right out of the box. Just provide your VIN when you place your order.
Where is the PCM located on my 1997 Tahoe?
On most compatible 1997 GM trucks and vans, including the Tahoe, the PCM is located in the engine compartment on the driver’s side (LH side), often near the battery or on the inner fender.
Will I need to perform any other procedures after installation?
In many cases, it is a simple plug-and-play installation. However, some vehicles may require a Crankshaft Position Sensor Relearn (CASE Relearn) to clear a P1336 trouble code. This procedure can often be performed by a qualified mechanic with a capable scan tool.
How do I provide my VIN?
You can enter your 17-digit Vehicle Identification Number (VIN) during the checkout process. You can find your VIN on the driver’s side of the dashboard (visible through the windshield), on the driver’s door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this computer fix my transmission shifting problems?
If the erratic shifting is caused by faulty signals from the PCM, then yes, this part will resolve the issue. The PCM controls transmission line pressure and shift solenoids, so a failing module is a very common cause of shifting problems in these vehicles.