Restore Your GM’s Performance and Reliability
If you’re dealing with a frustrating no-start condition, erratic engine behavior, or a persistent Check Engine light on your 1997 GM vehicle, a failing Powertrain Control Module (PCM) is often the culprit. As the ‘brain’ of your vehicle, the PCM controls everything from fuel mixture and ignition timing to transmission shift points. When it fails, it can cause a cascade of confusing problems. This replacement PCM, part number 19109047, is the definitive solution to get your car running smoothly and efficiently again.
We take the guesswork and extra expense out of the repair. Unlike other suppliers, we flash this module with the latest GM software updates specifically for your car using the VIN you provide at checkout. This means it arrives at your door ready to install, with no need for an expensive trip to the dealership for programming. It’s a direct-fit, reliable fix designed to restore your vehicle’s original performance.
From the Diagnostic Bay: The Case of the Heat-Soaked Grand Prix
I remember a 1997 Grand Prix GTP with the supercharged 3.8L that came into my shop with a maddeningly intermittent issue. The owner said it would run perfectly for about 20 minutes, then suddenly stall and refuse to restart until it cooled down completely. There were no hard codes, just a history of random misfires. After checking fuel pressure and ignition components, we suspected the PCM. On a hunch, I used a heat gun to carefully warm the module while the engine was running. Sure enough, at about 150°F, the engine sputtered and died. The thermal stress over two decades had caused internal solder joints to fail when hot. A new, correctly programmed PCM fixed it instantly. This is a classic failure mode for these units.
Is Your Vehicle Showing These Symptoms?
A failing PCM can manifest in many ways. If you’re experiencing any of the following, this module is a likely solution:
- ✔ Engine stalling or refusing to start
- ✔ Harsh or erratic automatic transmission shifting
- ✔ A persistent Check Engine Light (CEL)
- ✔ Common diagnostic trouble codes (DTCs) like P0601, P0605, or U-series communication codes
- ✔ Poor fuel economy and loss of power
- ✔ Failure to pass an emissions test
A Straightforward Guide to Installation
Replacing the PCM is a manageable job for a confident DIYer. Following these steps ensures a smooth installation process.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On most of these GM models, the PCM is located inside the air filter box in the engine compartment. You will need to remove the air filter cover to access it.
- Disconnect Connectors: Carefully unclip and disconnect the electrical wiring harnesses from the old PCM. These connectors have locking tabs that must be released before pulling.
- Remove the Old Module: Unbolt or unclip the old PCM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Seat your new, pre-programmed PCM into the mounting bracket and secure it.
- Reconnect Everything: Firmly reconnect the wiring harnesses, ensuring they click into place. Reinstall the air filter box cover.
- Final Step: Reconnect the negative battery terminal. The vehicle may need to complete a drive cycle for all systems to normalize.
Will This Fit My Car?
This module is a guaranteed fit for the following 1997 models. Please confirm your vehicle and engine options match the list below. This part is a direct replacement for original part numbers 16227797 and 19109047.
- ✔ BONNEVILLE: 1997 Electronic Control Module; (6-231, 3.8L), w/supercharged option
- ✔ CAMARO: 1997 Electronic Control Module; 6-231 (3.8L)
- ✔ EIGHTY EIGHT: 1997 Electronic Control Module; (6-231, 3.8L), w/supercharged option
- ✔ FIREBIRD: 1997 Electronic Control Module; 6-231 (3.8L)
- ✔ GRAND PRIX: 1997 Electronic Control Module; 6-231 (3.8L), w/supercharged option
- ✔ LUMINA CAR: 1997 Electronic Control Module; 6-207 (3.4L)
- ✔ MONTE CARLO: 1997 Electronic Control Module; 6-207 (3.4L)
- ✔ PARK AVENUE: 1997 Electronic Control Module; (6-231, 3.8L)
- ✔ REGAL: 1997 Electronic Control Module; (6-231, 3.8L), w/supercharged option
- ✔ RIVIERA: 1997 Electronic Control Module; (6-231, 3.8L)