Restore Your Vehicle’s Brain and Get Back on the Road
Is your truck or van acting possessed? If you’re dealing with a frustrating no-start condition, a persistent check engine light, erratic shifting, or abysmal fuel economy, the culprit is often the Powertrain Control Module (PCM). As a technician with over two decades of experience under the hood, I’ve seen how a failing PCM can mimic a dozen other problems, leading to wasted time and money on unnecessary parts. This isn’t just a component; it’s the central computer managing your engine and transmission performance. When it fails, your vehicle’s reliability is gone.
This is a dependable, tested OEM PCM, part number 09355699, sourced from a salvaged vehicle. The real value here is our professional programming service. Before we ship it, we flash the module with the latest GM software updates and program it specifically to your vehicle’s VIN. This means no expensive trips to the dealership for programming. It arrives at your door ready for a straightforward installation, making it a perfect solution for both seasoned mechanics and dedicated DIYers looking to perform a reliable repair on their 1998 Isuzu Hombre PCM.
A Technician’s Notebook: The Ghost in the Machine
I remember a 1998 Chevy C1500 that came into my bay with an intermittent no-start that was driving the owner crazy. It would be fine for weeks, then refuse to start for an hour. No rhyme or reason. The battery was new, the starter was good, and the fuel pump was priming. After hours of chasing wires and checking grounds, we hooked up a high-end scanner and monitored the PCM’s data stream. We noticed that during the no-start events, the PCM wasn’t sending the ‘crank’ signal. The internal processor was failing intermittently under specific temperature conditions. We swapped in a programmed PCM just like this one, and the problem was solved instantly. It’s a classic failure mode for these units, and replacing the 1998 Isuzu Hombre PCM is often the only permanent fix.
Is Your Truck Exhibiting These Symptoms?
A failing PCM can cause a wide range of issues. If you’re noticing any of the following, it might be time for a replacement:
- âś” Check Engine Light is on with communication-related codes (e.g., P0601, P0605, P0606).
- âś” Vehicle will not start or is difficult to start.
- âś” Rough idling or stalling unexpectedly.
- âś” Poor acceleration and overall engine performance.
- âś” Decreased fuel efficiency for no apparent reason.
- âś” Automatic transmission shifting harshly or at the wrong times.
- âś” Failure to pass an emissions test.
A Straightforward Guide to Your PCM Swap
Installing your programmed PCM is a manageable job for most DIYers. Following these steps will ensure a smooth process.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow the system to fully discharge.
- Locate the PCM: On most of these GM trucks and vans, the PCM is located in the engine compartment, often on the driver’s side inner fender or near the battery. Refer to your vehicle’s service manual for the exact location.
- Disconnect the Connectors: Carefully unclip the wiring harness connectors from the old PCM. These connectors have locking tabs; be gentle to avoid breaking them. There may be several multi-pin connectors.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket. It’s typically held in place by a few bolts or nuts.
- Install the New Module: Mount your new, pre-programmed PCM onto the bracket and securely fasten it.
- Reconnect Everything: Firmly plug the wiring harness connectors into the new module. You should hear or feel a click as they lock into place. Reconnect the negative battery terminal.
- Perform Security Relearn: Your vehicle may require a security relearn procedure to recognize the new PCM. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times before attempting to start the engine. This allows the BCM and PCM to sync.
Will This Fit My Truck or Van?
We guarantee this module is a direct replacement for part number 09355699 and its alternatives. It is compatible with a wide range of GM vehicles. Please verify your part number and check the list below to ensure proper fitment for your specific model and engine.
This module is compatible with the following part numbers: 09355699, 16266645, 16250279, 16258815, 09366810, 9366810
Fits these models (with options specifying ID 09355699):
- ASTRO 98 (4.3L)
- BLAZER S10/JIMMY S15 98 (4.3L)
- BRAVADA 98 (4.3L)
- CHEVROLET 1500 PICKUP 98-99 (5.0L, 5.7L)
- CHEVROLET 2500 PICKUP 98-99 (Gasoline)
- CHEVROLET 3500 PICKUP 98-99 (Gasoline)
- ENVOY 98 (4.3L)
- ESCALADE 99
- EXPRESS 1500 VAN 98-99
- EXPRESS 2500 VAN 98-99 (Gasoline)
- EXPRESS 3500 VAN 98-99 (Gasoline)
- GMC 1500 PICKUP 98-99 (5.0L, 5.7L)
- GMC 2500 PICKUP 98-99 (Gasoline)
- GMC 3500 PICKUP 98-99 (Gasoline)
- ISUZU HOMBRE 98 (4.3L)
- S10/S15/SONOMA 98 (4.3L)
- SAFARI (GMC) 98 (4.3L)
- SAVANA 1500 VAN 98-99
- SAVANA 2500 VAN 98-99 (Gasoline)
- SAVANA 3500 VAN 98-99 (Gasoline)
- SUBURBAN 1500 98-99 (Gasoline)
- SUBURBAN 2500 98-99 (Gasoline)
- TAHOE 98-99 (Gasoline)
- YUKON 98-99
Frequently Asked Questions
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to program the PCM correctly. It contains specific information about your vehicle’s engine, transmission, and factory options. This ensures the module works perfectly with your exact setup, just like the original.
Is this a new part?
No, this is a genuine, used OEM part that has been carefully sourced from a salvaged vehicle. We test all modules to ensure they are fully functional before programming and shipping.
Will I need to do anything after installation?
After installing the module and reconnecting the battery, you will likely need to perform a simple security relearn procedure (as outlined in the installation guide). Some vehicles may also require a Crankshaft Variation Relearn (CASE learn) to clear a P1336 code, which can be done with a capable bi-directional scan tool.
Does this part come with a warranty?
Yes, all our programmed modules come with a warranty. Please see the warranty tab on the product page for complete details and duration.
Is this the correct fix for my problem?
While this part fixes the common symptoms listed, proper diagnosis is key. We recommend confirming the PCM is the fault before ordering. In my shop, I always verify power and ground to the PCM and check for communication with a scan tool before condemning the module. This is a crucial diagnostic step.