Programmed 1998 Monte Carlo PCM 16236757 | Flashed to Your VIN

Restore Your Vehicle’s Performance and Reliability

Is your Chevrolet, Pontiac, or Buick suddenly stalling, shifting erratically, or showing a persistent Check Engine Light? These are classic signs that the brain of your vehicle—the Powertrain Control Module (PCM)—may be failing. As a technician with over two decades of experience under the hood, I’ve seen how a faulty PCM can cause a cascade of frustrating issues, from poor fuel mileage to a no-start condition. This isn’t just an inconvenience; it’s a critical component failure that needs a reliable fix.

This replacement PCM, part number 16236757, is the definitive solution. We take the guesswork and extra expense out of the repair by pre-programming the module specifically for your vehicle using your VIN. This means it arrives at your door with the latest GM software updates, ready for a straightforward installation. You get a component that not only fixes the immediate problem but also incorporates software improvements made since your car first left the factory.

Common Signs Your PCM is Failing

If you’re experiencing any of the following, a failing PCM is a likely culprit. Before ordering, it’s always a good practice for a professional or experienced DIYer to verify power and grounds at the PCM connector to rule out wiring issues.

• ✔ Check Engine Light is on with codes like P0601, P0602, P0605, or P0606.
• ✔ The engine cranks but refuses to start.
• ✔ Unexplained stalling or rough idling.
• ✔ Noticeable decrease in fuel economy.
• ✔ Harsh or erratic automatic transmission shifting.
• ✔ Failure to pass an emissions inspection.
• ✔ Communication errors with your scan tool.

A Straightforward Guide to Installation

Installing your programmed 1998 Monte Carlo PCM is a job most DIY enthusiasts can handle. While the exact location varies slightly by model (e.g., under the hood in the airbox or inside the passenger compartment), the general process is consistent.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes for capacitors to discharge.
2. Locate the Module: Find the existing PCM. On many of these GM vehicles, it’s located inside the air filter housing or on the passenger side of the engine compartment.
3. Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Never force them. Inspect the connectors for any corrosion or damaged pins.
4. Remove the Old PCM: Unbolt the module from its mounting bracket or housing.
5. Install the New PCM: Mount your new, pre-programmed PCM securely in place.
6. Reconnect Everything: Firmly seat the electrical connectors until they click into place. Reconnect the negative battery terminal.
7. Perform Security Relearn: After installation, you will likely need to perform a simple security relearn procedure (often called Passlock or Passkey). This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows the new PCM to recognize your vehicle’s anti-theft system.

Will This Fit My Vehicle?

This module is a direct-fit replacement for a wide range of 1998 and 1999 General Motors vehicles. Please verify your vehicle is on this list and provide your VIN upon purchase to ensure perfect programming. It is compatible with service numbers 09356741, 16236757, 9357034, 9357440, and 9366314.

• ACHIEVA 98 (3.1L)
• ALERO 99 (3.4L)
• BONNEVILLE 98
• CAMARO 98 (3.8L)
• CENTURY 98 (3.1L)
• CUTLASS 98-99
• EIGHTY EIGHT 98
• FIREBIRD 98 (3.8L)
• GRAND AM 98 (3.1L)
• GRAND AM 99 (3.4L)
• GRAND PRIX 98
• INTRIGUE 98
• LESABRE 98 (3.8L)
• LUMINA CAR 98
• MALIBU 98 (3.1L)
• MONTE CARLO 98
• PARK AVENUE 98 (3.8L)
• REGAL 98
• RIVIERA 98 (3.8L)
• SILHOUETTE 98
• SKYLARK 98 (3.1L)
• TRANS SPORT 98
• VENTURE 98 (3.4L)

Frequently Asked Questions