Restore Peak Performance to Your 1997 GM Vehicle
If your 1997 Pontiac Trans Sport, Grand Prix, or another GM vehicle from that era is suddenly stalling, running rough, or refusing to start, the Powertrain Control Module (PCM) is a primary suspect. As the central computer for your engine and transmission, its proper function is non-negotiable. Over two decades of service, these original modules can fail due to heat cycles, vibration, and component aging. This isn’t just an inconvenience; it can leave you stranded. We offer a reliable, direct-fit solution: a replacement PCM, part number 16217058, professionally programmed to your vehicle’s specific VIN.
Why VIN Programming is a Game-Changer
In my 20+ years as a technician, one of the biggest hurdles for DIYers and even professional shops used to be module replacement. You couldn’t just swap a computer from another car. It needed to be programmed by a dealer with expensive equipment. Our service eliminates that entire step. By providing your Vehicle Identification Number (VIN) at checkout, you receive a 1997 Trans Sport PCM that is truly plug-and-play. We flash it with the latest official GM software updates, which often correct factory drivability issues and improve performance. This ensures perfect communication with your vehicle’s other systems right out of the box.
A Technician’s Notebook: The Intermittent Stall on a ’97 Grand Prix
A customer brought in a 1997 Grand Prix 3.8L with a frustrating problem: it would randomly stall at stoplights, but only when warm. There were no consistent trouble codes, just a history of random misfires. We checked fuel pressure, ignition components, and sensors—all tested fine. On a hunch, I tapped the PCM housing with a screwdriver handle while the engine was running, and it immediately stumbled. The internal processor was failing under thermal stress. Replacing the PCM with a pre-programmed unit like this one solved the problem instantly. It’s a classic failure mode for these modules, and a new PCM is often the only permanent fix.
Common Signs of a Failing PCM
- ✔ Check Engine Light is on with communication codes (U-codes) or internal processor fault codes (e.g., P0601, P0605).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained stalling or rough, erratic idling.
- ✔ A noticeable drop in fuel economy.
- ✔ Harsh or incorrect shifting from the automatic transmission.
- ✔ No communication with a diagnostic scan tool.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental contact.
- ✔ Locate the PCM: On many of these 1997 GM models, the PCM is located inside the air filter housing for protection and cooling. You may need to remove the air intake ducting and the top of the airbox to access it.
- ✔ Disconnect the Module: Carefully unplug the electrical connectors from the old PCM. These connectors have locking tabs that must be released before they can be removed. Do not force them.
- ✔ Swap the Units: Remove the old PCM from its mounting bracket and install the new, pre-programmed module in its place.
- ✔ Reconnect and Finalize: Securely plug the electrical connectors into your new 1997 Trans Sport PCM. Reassemble the airbox and intake components. Finally, reconnect the negative battery terminal. The vehicle is now ready to start.
Will This Fit My Vehicle?
This module is a direct replacement for part numbers 16217058 and 16218070. It is guaranteed to fit the following 1997 models with the specified options:
- ✔ Achieva: 1997 w/ 3.1L (6-191) Engine
- ✔ Bonneville: 1997 w/ 3.8L (6-231) Engine (w/o supercharged option)
- ✔ Century: 1997 w/ 3.1L (6-191) Engine
- ✔ Cutlass: 1997 Supreme models
- ✔ Eighty Eight: 1997 w/ 3.8L (6-231) Engine (w/o supercharged option)
- ✔ Grand Am: 1997 w/ 3.1L (6-191) Engine
- ✔ Grand Prix: 1997 w/ 3.1L (6-191) or 3.8L (6-231) Engine (w/o supercharged option)
- ✔ LeSabre: 1997 w/ 3.8L (6-231) Engine
- ✔ Lumina Car: 1997 w/ 3.1L (6-191) Engine
- ✔ Monte Carlo: 1997 w/ 3.1L (6-191) Engine
- ✔ Regal: 1997 w/ 3.8L (6-231) Engine (w/o supercharged option)
- ✔ Silhouette: 1997 w/ 3.4L (6-207) Engine
- ✔ Skylark: 1997 w/ 3.1L (6-191) Engine
- ✔ Trans Sport: 1997 w/ 3.4L (6-207) Engine
- ✔ Venture: 1997 w/ 3.4L (6-207) Engine
Frequently Asked Questions
Why do you need my vehicle’s VIN?
Your VIN allows us to program the PCM with the exact software and calibrations your specific vehicle requires. This includes details like engine size, transmission type, and other factory options, ensuring seamless operation upon installation.
Is any other programming needed after I install it?
No. This module arrives fully programmed and ready for installation. No trip to the dealer is necessary. In some cases, a security relearn procedure may be required, which can typically be done without special tools by cycling the key. Instructions can be easily found online for your specific model.
What part numbers does this module replace?
This computer is a direct replacement for GM part numbers 16217058 and 16218070.
Will this fix my Check Engine Light?
If the Check Engine Light is on due to an internal failure of the PCM (common codes include P0600-P0606) or a fault that the PCM itself is causing, then yes, this will resolve the issue. It’s crucial to properly diagnose the vehicle first to ensure the PCM is the root cause.
Where is the PCM located on my 1997 GM vehicle?
On the majority of vehicles in this fitment list, including the Trans Sport, Venture, and Silhouette minivans, the PCM is housed within the engine’s air filter box assembly for protection from the elements and engine heat.