Is Your 1998 GMC Safari Giving You Headaches?
If your trusty 1998 GMC Safari is suddenly stalling, refusing to start, shifting erratically, or lighting up the dashboard like a Christmas tree with random error codes, the problem often points directly to a failing Powertrain Control Module (PCM). As a technician with over two decades of experience, I’ve seen these symptoms countless times on these workhorse vans. A faulty PCM can make diagnosing issues a nightmare, as it’s the central computer responsible for engine performance and transmission control. Don’t keep throwing parts at the problemโget the direct, reliable solution.
The Smart Solution: A VIN-Programmed PCM
This isn’t just a used part pulled from a shelf. This is a fully tested, genuine GM PCM, part number 16266645, that we program specifically for your vehicle before it ships. By providing your Vehicle Identification Number (VIN) at checkout, you receive a module that is loaded with the latest GM factory software updates for your exact 1998 GMC Safari. This process ensures seamless communication between the computer and your vehicle’s systems, restoring original performance and efficiency.
Expert Pro Tip: Check Your Connectors First!
Before you swap out the PCM on these older GM vans, take a moment to inspect the large electrical connectors that plug into the module. Over the years, moisture and dirt can cause corrosion on the pins, leading to poor connections that mimic a failed PCM. I’ve seen customers save hundreds of dollars simply by cleaning these contacts with a small brush and some electrical contact cleaner. A 10-minute check can save you a lot of hassle.
Common Symptoms of a Failing 1998 GMC Safari PCM:
- โ Check Engine Light is on with multiple, unrelated codes.
- โ The engine cranks but refuses to start.
- โ Harsh or erratic automatic transmission shifting.
- โ Poor fuel economy and loss of power.
- โ Intermittent stalling for no apparent reason.
- โ Your scan tool cannot communicate with the PCM.
Plug-and-Play Installation: No Dealer Visit Required
One of the biggest benefits of our service is that this module arrives ready for installation. You can get your van back on the road without the time and expense of a trip to the dealership for programming. The installation is straightforward for a DIYer with basic tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On the 1998 GMC Safari, the PCM is typically located in the engine compartment on the driver’s side, near the battery.
- Disconnect and Remove: Carefully unplug the electrical connectors. Use a socket wrench to remove the bolts holding the module in its bracket.
- Install the New Module: Seat the replacement PCM in the bracket and tighten the bolts. Reconnect the electrical harnesses, ensuring they click securely into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Final Step: In some cases, a security relearn procedure may be necessary. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Consult your vehicle’s service information for specific steps if required.
Guaranteed Compatibility
This PCM is a direct replacement for several part numbers, ensuring a perfect fit for your vehicle. It is compatible with service numbers: 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, and 9366810. While this listing is for a 1998 GMC Safari, this module also fits a wide range of other GM trucks and vans from that era. Please verify your part number to ensure proper fitment.
Please Note: This is a high-quality, tested computer sourced from a salvaged vehicle. After purchase, you must provide us with your VIN so we can program the module correctly before shipment. This is a critical step to ensure your vehicle runs properly.