Restore Peak Performance to Your GM Vehicle
If you’re dealing with frustrating issues like a persistent check engine light, erratic engine behavior, or a no-start condition in your 1998 Oldsmobile Bravada, a failing Powertrain Control Module (PCM) is often the culprit. As the brain of your vehicle’s engine and transmission, its proper function is critical. This genuine, used OEM PCM, part number 16258815, is the reliable and affordable solution you need. We take the guesswork and dealer expense out of the equation by programming the module to your vehicle’s specific VIN before it ships. This ensures it arrives ready for a straightforward installation, loaded with the latest GM software updates for optimal performance and efficiency.
A Technician’s Notebook
I remember a ’98 GMC Jimmy that came into my shop with a classic, head-scratching problem. It would run perfectly for days, then suddenly refuse to start, with no spark and no fuel injector pulse. The owner had already replaced the ignition coil and crank sensor. After connecting my scan tool, I noticed intermittent communication loss with the computer. These symptoms are textbook for an internal failure in the 1998 Bravada PCM and its counterparts. The solder joints and capacitors inside these modules can degrade after 20+ years of heat cycles. We installed a VIN-programmed unit just like this one, performed the security relearn, and the truck fired up instantly. It’s been a reliable daily driver for the owner ever since. This isn’t just a part; it’s a permanent fix for a very common issue.
Is Your Vehicle Showing These Symptoms?
A faulty PCM can manifest in various ways. If you’re experiencing any of the following, this module is likely the solution.
- ✔ Check Engine Light is on with codes like P0601, P0604, or P0606.
- ✔ Vehicle has intermittent or complete no-start issues.
- ✔ Poor or declining fuel economy.
- ✔ Rough or unstable idling.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Failure to pass an emissions test.
- ✔ Communication errors with diagnostic scan tools.
A Straightforward Guide to Installation
Installing your pre-programmed 1998 Bravada PCM is a job most DIYers can handle in their own garage. Follow these general steps to get back on the road.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes for capacitors to discharge.
- Locate the PCM: On most of these GM trucks and SUVs, the PCM is located in the engine compartment, often on the driver’s or passenger’s side fender well, or near the battery.
- Disconnect Wiring: Carefully unplug all wiring harness connectors from the old module. These usually have a locking tab that needs to be released.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket.
- Install the New Module: Bolt the replacement PCM into place and securely reconnect all wiring harnesses. Ensure they click into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Security Relearn: Many GM vehicles of this era require a security relearn procedure to sync the new PCM with your vehicle’s anti-theft system. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times. Your vehicle’s service manual will have the exact procedure.
Verified Vehicle Compatibility
This module is a direct replacement for service ID 9355699 and part numbers 09355699, 16266645, 16250279, 16258815, 09366810, and 9366810. It is confirmed to fit the following vehicles:
- Oldsmobile Bravada: 1998 (4.3L)
- Oldsmobile Envoy: 1998
- Chevrolet/GMC S10/S15/Sonoma: 1998 (4.3L)
- Chevrolet Blazer / GMC Jimmy: 1998
- Chevrolet/GMC 1500, 2500, 3500 Pickups: 1998-1999
- Chevrolet Suburban / GMC Yukon: 1998-1999
- Chevrolet Tahoe / Cadillac Escalade: 1998-1999
- Chevrolet Astro / GMC Safari Van: 1998
- Chevrolet Express / GMC Savana Van (1500, 2500, 3500): 1998-1999
- Isuzu Hombre: 1998 (4.3L)
Please ensure your existing module’s part number or service ID matches our list for guaranteed compatibility. Providing your VIN upon purchase is mandatory for programming.
Frequently Asked Questions
Why do you need my VIN?
We require your Vehicle Identification Number (VIN) to program the PCM with the exact software and calibrations for your vehicle’s specific options, engine, and transmission. This makes the unit plug-and-play and ensures proper function.
Is this a new part?
No, this is a high-quality, tested, and fully functional used OEM part sourced from a salvaged vehicle. This provides OEM reliability at a fraction of the cost of a new unit.
Will I need to do anything else after installation?
After installing the PCM, you will likely need to perform a security relearn procedure (also known as a Passlock relearn). This simple process, which doesn’t require special tools, syncs the module to your vehicle’s anti-theft system. We can provide general instructions upon request.
Does this 1998 Bravada PCM come with a warranty?
Yes, all of our programmed modules come with a warranty. Please check the warranty details section of this listing for specific coverage information.
What if my part number isn’t listed?
Please contact us with your vehicle’s year, make, model, and the part number from your original module. We have a vast inventory and can likely find the correct, compatible part for your needs.