Restore Your Vehicle’s Brain with a Reliable, Programmed PCM
If your 1999 Chevrolet Lumina or another compatible GM vehicle is experiencing perplexing issues like stalling, rough idling, erratic shifting, or a persistent Check Engine Light, the problem often points to a failing Powertrain Control Module (PCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty PCM can cripple a perfectly good engine. This isn’t just a part; it’s the central command center for your engine and transmission. This listing offers a dependable, tested, and pre-programmed PCM, part number 09361735, to get your car back to factory-spec operation without the dealership price tag.
We take the guesswork and hassle out of the replacement process. Before we ship this module, we flash it with the latest official GM software updates, specifically tailored to your vehicle using the VIN you provide. This means it arrives at your door ready for installation, saving you a costly trip to the dealer for programming. This is a genuine OEM part sourced from a salvaged vehicle, thoroughly inspected to ensure full functionality.
From the Diagnostic Bay: The Case of the Intermittent Stall
I remember a 1999 Pontiac Grand Prix—which uses this exact PCM—that came into my shop with an issue that drove the owner crazy. It would run fine for days, then suddenly stall at a stoplight and refuse to restart for 10-15 minutes. No consistent codes were stored, just a history of random misfires. After checking fuel pressure and ignition components, my gut told me it was the computer. We connected a scan tool and monitored live data, and sure enough, during a test drive, we saw the PCM data stream completely drop out right before it stalled. The culprit was an internal solder joint in the PCM that would separate when it got hot. Replacing it with a solid, tested module like this one solved the problem for good. These intermittent failures are classic signs of a dying 1999 Lumina Car PCM and its counterparts.
Is Your GM Vehicle Showing These PCM Failure Signs?
A failing PCM can manifest in numerous ways. If you’re noticing any of the following, it’s a strong indicator that your engine’s computer needs attention:
- ✔ Unexplained Check Engine Light illumination, often with codes like P0601 (Internal Control Module Memory Check Sum Error), P0605 (Read Only Memory Error), or P0606 (PCM Processor Fault).
- ✔ Engine cranks but refuses to start.
- ✔ Intermittent stalling, especially after the engine has warmed up.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or delayed automatic transmission shifting.
- ✔ Rough or unstable engine idle.
- ✔ Failure to pass an emissions test.
A Straightforward Guide to Your PCM Installation
Replacing your 1999 Lumina Car PCM is a job most DIY enthusiasts can handle with basic tools. Following these steps will ensure a smooth process. On the 1999 Lumina, the PCM is typically located in the air filter housing in the left-hand (driver’s side) engine compartment.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow capacitors to discharge.
- Locate the Module: Find the PCM. On most of these vehicles, it’s in a black plastic case attached to the air filter box.
- Disconnect Connectors: Carefully unclip and remove the electrical harness connectors from the old PCM. They are often color-coded and have locking tabs that need to be released. Avoid forcing them.
- Remove the Old PCM: Unbolt or unclip the module from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed PCM in the same location and secure it.
- Reconnect Everything: Firmly re-seat the electrical connectors until they click into place. Reconnect your vehicle’s negative battery terminal.
- Perform Security Relearn: After installation, you will likely need to perform a simple security relearn procedure (often called the Passlock or Passkey relearn) to allow the car to start. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. Consult your vehicle’s specific procedure for exact steps.
Verified Vehicle Compatibility List
This PCM, part number 9361735, is a direct replacement for a wide range of GM models. Please verify your vehicle and options below to ensure a perfect match. The location of the module is noted in parentheses.
- BONNEVILLE 99-00: Electronic Control Module; (LH engine compartment)
- CENTURY 99: Electronic Control Module; (LH engine compartment)
- CUTLASS 99: Electronic Control Module; (LH center dash), ID 9361735
- EIGHTY EIGHT 99: Electronic Control Module; (LH engine compartment)
- GRAND PRIX 99-00: Electronic Control Module; (LH engine compartment)
- IMPALA 00: Electronic Control Module; (LH engine compartment), 3.4L or 3.8L
- INTRIGUE 99: Electronic Control Module; (LH engine compartment)
- LESABRE 99-00: Electronic Control Module; (LH front engine compartment)
- LUMINA CAR 99: Electronic Control Module; (LH engine compartment)
- MALIBU 99: Electronic Control Module; (LH dash), 3.1L
- MONTE CARLO 99-00: Electronic Control Module; (LH engine compartment)
- MONTANA 99: Electronic Control Module; (LH engine compartment)
- PARK AVENUE 99: Electronic Control Module; (LH front engine compartment)
- REGAL 99: Electronic Control Module; (LH engine compartment)
- RIVIERA 99: Electronic Control Module; (RH dash)
- SILHOUETTE 99: Electronic Control Module; (LH engine compartment)
- TRANS SPORT 99: Electronic Control Module; (Canada, LH front engine compartment)
- VENTURE 99: Electronic Control Module; (LH engine compartment)
Frequently Asked Questions About This 1999 Lumina Car PCM
Frequently Asked Questions
What does “VIN Programmed” mean for me?
It means we load your car’s specific factory software and the latest GM updates onto this PCM using your 17-digit Vehicle Identification Number (VIN). This ensures it works correctly with your engine, transmission, and options right out of the box, eliminating the need for a dealer visit.
How do I provide my VIN?
After completing your purchase, simply send us a message with your full 17-digit VIN. We cannot program and ship the module without it.
Is this a new part?
No, this is a fully functional, tested OEM computer sourced from a salvaged vehicle. This provides OEM reliability at a fraction of the cost of a new part.
Will I need to do anything after I install it?
Yes, in most cases, you will need to perform a simple security relearn procedure. This syncs the new PCM with your vehicle’s anti-theft system and allows the engine to start. This procedure is straightforward and does not require special tools.
Where is this PCM located on my 1999 Lumina?
On the 1999 Chevy Lumina, the PCM is typically housed within the air filter box assembly, located in the left-hand (driver’s side) of the engine compartment.