Is your 1998 or 1999 GMC Safari experiencing frustrating issues like stalling, rough idling, a persistent check engine light, or even a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your van’s engine and transmission performance. A faulty PCM can disrupt everything from fuel delivery and ignition timing to transmission shifting, leaving you with an unreliable and inefficient vehicle. Don’t let a bad computer keep you off the road. This direct-fit PCM, part number 09355699, is the definitive solution to restore your vehicle’s original performance and reliability.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and extra expense out of the repair by pre-programming the module specifically for your vehicle. When you place your order, simply provide us with your vehicle’s VIN (Vehicle Identification Number). Our technicians will then flash the PCM with the latest, most up-to-date software directly from GM. This ensures perfect compatibility and optimal performance, addressing any factory bugs or inefficiencies that may have existed in the original programming. When the module arrives at your door, it’s ready for a straightforward installation, getting your Safari back to running smoothly and efficiently.
Why Our Programmed 1998-1999 GMC Safari PCM is the Right Choice
Choosing the right replacement computer is critical for a lasting repair. Our commitment is to provide a component that not only fixes the immediate problem but also ensures long-term vehicle health. The 1998-1999 GMC Safari PCM you receive is meticulously prepared to meet or exceed original factory specifications. By flashing it with the latest GM updates, we help your engine and transmission operate with improved efficiency and precision. This process is essential for vehicles of this era, as software updates often resolved common drivability issues that were discovered after the vehicle left the factory. This module is a direct replacement for part numbers 16250279, 09366810, and 09355699, and fits a wide range of GM trucks and vans from that period, ensuring broad compatibility.
Common Symptoms of a Failing GM PCM
- ✔ Check Engine Light is on with various or no specific codes
- ✔ Engine stalls or runs rough for no apparent reason
- ✔ Unexplained drop in fuel economy
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Vehicle fails to start, even with a good battery and starter
- ✔ Communication errors with diagnostic scan tools
- ✔ Intermittent loss of spark or fuel injector pulse
If you’re experiencing one or more of these symptoms, a failing powertrain module is a very likely culprit. Replacing it with our pre-programmed 1998-1999 GMC Safari PCM is the most effective way to resolve these complex electronic issues and restore the dependable performance you rely on.
Frequently Asked Questions
Do I need to get this PCM programmed?
No. We handle all the programming for you before we ship the part. Simply provide your vehicle’s VIN during or after checkout, and it will arrive ready for installation.
Where is the PCM located on a 1998-1999 GMC Safari?
On the GMC Safari and its sibling, the Chevrolet Astro, the PCM is typically located in the engine compartment on the driver’s side, near the battery. Always disconnect the battery before attempting to remove or install the module.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this part will resolve the issue. However, it’s always recommended to have the codes read by a professional or with a scan tool to ensure the PCM is the root cause of the problem.
Is any special procedure needed after installation?
For many GM vehicles of this era, a security relearn procedure (often called a Passlock or VATS relearn) may be necessary to allow the vehicle to start. This is a simple procedure that typically involves turning the key on and off in a specific sequence and can be done without special tools. Instructions are readily available online or in service manuals.
What information do you need from me?
All we need is your vehicle’s 17-digit VIN (Vehicle Identification Number). This allows us to load the exact, correct software for your van’s specific engine, transmission, and options.