Restore Your Safari’s Performance and Reliability
Is your GMC Safari suffering from perplexing issues like erratic shifting, a rough idle, or a no-start condition that leaves you stranded? A failing Powertrain Control Module (PCM) is often the hidden culprit behind these frustrating problems. It’s the brain of your vehicle, and when it falters, the entire system is compromised. This isn’t just an inconvenience; it’s a matter of safety and peace of mind. We’re here to provide the definitive solution: a professionally programmed PCM, engineered to restore your van’s original performance and get you back on the road with confidence.
This module arrives at your doorstep fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures seamless communication with your Safari’s other onboard systems, eliminating the need for expensive dealership programming. It’s a true plug-and-play solution designed to make your repair straightforward and successful.
Warning Signs and How to Overcome Them
If you’re noticing any of the following symptoms, it’s a strong indicator that your PCM may need replacement:
- ✔ Unexplained check engine light illumination, often with communication-related DTCs like U0100.
- ✔ Harsh or delayed transmission shifting.
- ✔ A noticeable drop in fuel economy.
- ✔ Engine stalling, misfiring, or running rough.
- ✔ The vehicle cranks but refuses to start.
- ✔ Inaccurate or non-functional dashboard gauges.
Replacing your old module with our pre-programmed unit directly addresses these issues, restoring the precise fuel delivery, ignition timing, and transmission control your vehicle had when it left the factory.
“I had a customer with a ’99 Safari who had replaced nearly every sensor trying to chase down an intermittent stalling issue. No codes, no clear pattern. He was at his wit’s end. On a hunch, we suggested the PCM. He installed our programmed unit, performed the security relearn, and the van ran perfectly. It was a classic case of the computer’s internal logic failing under load—a problem you can’t always diagnose with a simple scan tool. It’s a reminder that sometimes the ‘brain’ itself is the issue.”
– A word from our 20-year ASE Certified Technician
Guided Installation for a Confident Fix
Installing your new 1998-1999 GMC Safari PCM is a manageable job for a DIY enthusiast. Follow these steps for a smooth process:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow the system to fully discharge.
- Locate the Module: On the ’98-’99 Safari, the PCM is typically found in the engine compartment on the driver’s side, near the battery.
- Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors and gently pull them away from the old module. Never force them. Inspect the connectors for any corrosion or damage.
- Remove the Old PCM: Unbolt the mounting brackets holding the old module in place and remove it from the vehicle.
- Install the New PCM: Mount your new, pre-programmed module in the same location, securing it with the original hardware.
- Reconnect Everything: Firmly reconnect the electrical harnesses, ensuring they click securely into place. Reconnect the negative battery terminal.
- Perform Security Relearn: Your vehicle’s anti-theft system may need to be synchronized with the new PCM. This usually involves a simple key-on/key-off procedure. A common method is the “10-Minute Relearn,” which you can easily find instructions for online or in your service manual.
Tailored Fit for Your Ride
This module is a direct replacement for part numbers 09355699, 16250279, and 09366810. It is guaranteed to be compatible with the following vehicles and options:
- 1998-1999 GMC Safari
- 1998-1999 Chevrolet Astro
- 1999 Cadillac Escalade
- 1998-1999 Chevrolet & GMC C/K 1500/2500/3500 Pickups (Gasoline)
- 1998-1999 Chevrolet & GMC Suburban (Gasoline)
- 1998-1999 Chevrolet Tahoe & GMC Yukon
- 1998 Chevrolet & GMC Express/Savana Vans (Gasoline)
- 1998 Oldsmobile Bravada
- 1998 GMC Envoy
- 1998 Chevrolet S10 Blazer & GMC S15 Jimmy
- 1998 Chevrolet S10 & GMC Sonoma (4.3L)
- 1998 Isuzu Hombre (4.3L)
By purchasing this 1998-1999 GMC Safari PCM, you’re not just buying a part; you’re investing in the renewed health and longevity of your vehicle. Drive with the assurance that your engine and transmission are operating exactly as they were designed to.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
Yes. While the module comes programmed to your VIN, you will need to perform a security relearn procedure to sync the PCM with your vehicle’s anti-theft system. On many GM vehicles of this era, a Crankshaft Variation Relearn (CASE Relearn) may also be required using a capable scan tool to prevent a P1336 trouble code, though it may not be immediately necessary for the vehicle to run.
How do I provide my VIN number?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your order until we receive this information, as the programming is specific to your vehicle.
Is this a used part?
This is a professionally serviced and inspected original equipment part. Each unit undergoes rigorous testing to ensure it meets or exceeds OEM specifications for performance and reliability before being programmed with the latest GM software updates for your vehicle.
What if my part number isn’t listed but my vehicle is?
The part numbers 09355699, 16250279, and 09366810 are often interchangeable for the listed vehicles. As long as your vehicle model and year are on our compatibility list, this module will be the correct, programmed solution for you.
What is the warranty on this part?
This part comes with a lifetime warranty, covering any defects in the module itself. We stand behind our products to give you complete peace of mind with your purchase.