Restore Your Van’s Performance and Reliability
Is your 1998-1999 GMC Savana 1500 van giving you headaches? Unexplained stalling, a persistent Check Engine light, rough idling, or a frustrating no-start condition can bring your work or travels to a grinding halt. Often, the root cause isn’t a faulty sensor or wiring, but the vehicle’s central computer—the Powertrain Control Module (PCM). As a technician with over two decades of experience, I’ve seen countless hours and dollars wasted on replacing parts when the PCM was the real culprit. This component is the brain of your engine, and when it fails, it can create a host of confusing and intermittent problems.
This is your straightforward, cost-effective solution. We are offering a reliable, used OEM Powertrain Control Module that fits your 1998-1999 Savana 1500 PCM requirements perfectly. The best part? We take the biggest hassle out of the repair. Simply provide your vehicle’s VIN during checkout, and our experts will program the module with the latest official GM software updates specific to your van. This means it arrives at your door ready for installation, saving you a costly trip to the dealership and the expense of their programming service.
From the Diagnostic Bay
I remember a 1998 Chevy Express 2500 that came into my shop with a maddeningly intermittent stalling issue. The owner, a contractor, had already replaced the fuel pump and crank sensor. The van would run fine for days, then die at a stoplight without warning. No codes were stored. After checking fuel pressure and spark, my gut told me to look at the PCM. We connected a scope and saw the injector driver signal drop out randomly. We swapped in a VIN-programmed PCM just like this one, and the problem was solved instantly. The original module had a hairline crack in a circuit board that only caused issues when it warmed up. It’s a classic failure mode for these units.
Is Your Van or Truck Showing These Signs of a Bad PCM?
- ✔ Check Engine Light is on with internal module codes (like P0601, P0602, P0605).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained stalling or rough, erratic idling.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Communication errors with your scan tool.
A Straightforward Guide to Installation
Installing your pre-programmed 1998-1999 Savana 1500 PCM is a manageable job for a DIYer with basic tools. Follow these steps carefully for a smooth installation.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent any accidental reconnection.
- Locate the PCM: On most Savana and Express vans, the PCM is located in the engine compartment on the driver’s side, often near the battery or air filter housing.
- Disconnect the Connectors: Carefully unclip and remove the large electrical harness connectors from the old PCM. These connectors have locking tabs; do not force them. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the PCM from its mounting bracket. It’s typically held in place by a few small bolts.
- Install the New Module: Mount your new, pre-programmed PCM onto the bracket and secure it with the bolts.
- Reconnect Everything: Firmly plug the electrical connectors into the new PCM until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn (If Necessary): While we program the module to your VIN, some GM vehicles of this era may require a simple security relearn procedure to sync the new PCM with the anti-theft system. This can typically be done without special tools by cycling the key. Consult your vehicle’s service information for the exact procedure.
Verified Vehicle Compatibility
This module, identified by service number 16250279 or ID 9355699, is a direct replacement for a wide range of GM trucks and vans. Please verify your part number or match your vehicle from the list below. This part is compatible with the following part numbers: 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, 9366810.
CHEVROLET 2500 PICKUP 98-99 (Gasoline, LH front engine compartment)
CHEVROLET 3500 PICKUP 98-99 (Gasoline, LH front engine compartment)
EXPRESS 1500 VAN 98-99
EXPRESS 2500 VAN 98-99 (Gasoline)
EXPRESS 3500 VAN 98-99 (Gasoline)
SAVANA 1500 VAN 98-99
SAVANA 2500 VAN 98-99 (Gasoline)
SAVANA 3500 VAN 98-99 (Gasoline)
CADILLAC ESCALADE 99
GMC 1500 PICKUP 98-99 (Gasoline, LH engine compartment)
GMC 2500 PICKUP 98-99 (Gasoline, LH front engine compartment)
GMC 3500 PICKUP 98-99 (Gasoline, LH front engine compartment)
SUBURBAN 1500/2500 98-99 (Gasoline)
TAHOE/YUKON 98-99 (Gasoline)
ASTRO/SAFARI 98
BLAZER S10/JIMMY S15 98
BRAVADA 98
ENVOY 98
ISUZU HOMBRE 98 (4.3L)
S10/S15/SONOMA 98 (4.3L)
Frequently Asked Questions
Frequently Asked Questions
How do I provide my VIN number?
After completing your purchase, please send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it.
Is this a new part?
No, this is a thoroughly tested, used OEM part sourced from a salvaged vehicle. This allows us to provide a reliable, factory-correct part at an affordable price.
What does ‘programmed with the newest updates’ mean?
GM often releases software updates to fix bugs, improve transmission shifting, or enhance engine performance long after the vehicle is sold. We flash your module with the latest version available for your specific VIN, ensuring optimal operation.
Will I need to do anything else after installation?
In many cases, it’s a direct installation. However, some vehicles may require a Crankshaft Variation Relearn (CASE Relearn) or a security relearn. The CASE relearn requires a capable scan tool, while the security relearn can often be done by cycling the ignition key. We recommend checking your vehicle’s specific procedure.
Do you need my old PCM back?
No core charge or return is required for this part. You can keep or recycle your old module.