Restore Peak Performance to Your 1997 GM Truck or Van
Is your 1997 GMC Yukon, Chevy Tahoe, or Suburban running rough, stalling, or displaying a persistent check engine light? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your vehicle’s engine and transmission. A faulty PCM can lead to a cascade of frustrating issues, from poor fuel economy to a complete no-start condition. This replacement PCM, part number 16229684, is the definitive solution to restore your vehicle’s original performance and reliability.
Unlike generic modules that require expensive dealership programming, this unit is delivered to you fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We install the latest GM-certified software updates, ensuring optimal fuel delivery, spark timing, and transmission shift points. This plug-and-play approach saves you time, money, and the hassle of towing your vehicle to a service center. Simply provide your VIN during checkout, and we handle the complex programming for you.
From the Diagnostic Bay
I remember a ’97 Tahoe that came in on a tow truck. The owner had spent a fortune replacing the fuel pump, ignition coil, and multiple sensors trying to chase down an intermittent stalling issue. The codes were all over the place. After confirming the PCM had good power and ground, we connected our scan tool and found it kept losing communication. We swapped in a VIN-programmed PCM like this one, performed the quick security relearn, and the truck fired up instantly and ran perfectly. It’s a reminder that when multiple, unrelated systems act up, the central controller is often the culprit.
Common Symptoms of a Failing 1997 Yukon PCM
- ✔ Persistent Check Engine Light (CEL) with communication-related trouble codes (e.g., U-codes).
- ✔ Engine cranks but refuses to start.
- ✔ Intermittent stalling, especially when warm or under load.
- ✔ Rough, erratic idle or stumbling on acceleration.
- ✔ Noticeable decrease in fuel efficiency and engine power.
- ✔ Harsh, delayed, or incorrect automatic transmission shifting.
- ✔ Failure to pass state emissions inspections.
The VIN Programming Advantage
Your vehicle’s VIN is more than just a serial number; it’s a key that unlocks specific operational parameters for your engine, transmission, and emissions equipment. By programming this module directly to your VIN, we ensure it functions exactly as the original factory unit did. This process accounts for your vehicle’s specific gear ratios, tire size, and other factory-installed options, which is critical for proper operation. This is not a one-size-fits-all solution; it is a tailored component for your exact vehicle.
Simple Installation Process
Replacing the PCM is a straightforward job for a DIY mechanic. It is typically located in the engine bay on the driver’s side, near the battery. After disconnecting the battery, you simply unbolt the old module, unplug the wiring harnesses, and install the new one in its place. Once installed, you may need to perform a simple security relearn procedure, which involves cycling the ignition key and does not require any special tools. This re-syncs the new PCM with your vehicle’s anti-theft system.
Guaranteed Fitment for Your 1997 GM Vehicle
This module is a direct replacement for part number 16229684 and 8162296840 and is confirmed to fit the following 1997 models with gasoline engines:
- GMC Yukon & Chevrolet Tahoe
- GMC Suburban 1500/2500 & Chevrolet Suburban 1500/2500
- GMC Sierra 1500/2500/3500 & Chevrolet C/K 1500/2500/3500 Pickups
- GMC Savana 1500/2500/3500 & Chevrolet Express 1500/2500/3500 Vans
- GMC Safari & Chevrolet Astro (4.3L)
- GMC Sonoma & Chevrolet S10 (4.3L)
- Oldsmobile Bravada (4.3L)
- Chevrolet Blazer & GMC Jimmy (4.3L)
- Isuzu Hombre (4.3L)
Frequently Asked Questions
Do I need to program this module?
No. We program the module with the latest GM software using the VIN you provide before we ship it. It arrives ready for installation.
What is a security relearn and is it difficult?
It’s a simple procedure to sync the new PCM with your vehicle’s anti-theft system. It typically involves turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. No tools are required.
Where is the PCM located on my 1997 Yukon or Tahoe?
The PCM is located in the engine compartment on the driver’s side (LH side), typically near the battery and fender.
Will this fix my transmission shifting problems?
If the PCM is the cause of the erratic shifting, then yes. The PCM controls the transmission’s electronic solenoids, and a faulty module can cause incorrect shift commands. However, you should rule out mechanical issues or low fluid first.
What information do you need from me?
After your purchase, we will need your 17-digit Vehicle Identification Number (VIN). You can find this on your vehicle’s dashboard (visible through the windshield) or on the driver’s side door jamb sticker.