Restore Your Vehicle’s Brain and Get Back on the Road
Is your 1998 Oldsmobile Bravada or GM truck acting up? Unexplained stalling, a persistent check engine light, or a no-start condition can often be traced back to a single, critical component: the Powertrain Control Module (PCM). As the central computer for your engine and transmission, its health is non-negotiable. This isn’t just a part; it’s the solution to getting your reliable vehicle back. We offer a dependable, tested, and pre-programmed PCM that takes the guesswork and high cost out of the repair process.
This unit is meticulously programmed using your vehicle’s specific Vehicle Identification Number (VIN). This ensures it comes loaded with the latest GM factory software updates, correcting common drivability issues and optimizing performance right out of the box. Forget about expensive towing and dealership programming fees. This is a direct-fit, cost-effective solution designed for both professional mechanics and savvy DIYers.
A Technician’s Notebook
I remember a 1998 GMC Jimmy that came into the shop with a laundry list of issues: erratic shifting, stalling at stoplights, and a check engine light the owner had been ignoring. He’d already replaced the throttle position sensor and the idle air control valve himself with no luck. After connecting my scan tool, I saw no communication with the PCM. A quick check of the powers and grounds to the computer confirmed they were good. The PCM itself had failed internally. Instead of a costly new unit, we installed a VIN-programmed module just like this one. After a 10-minute security relearn, the truck started and ran perfectly. It’s a classic case where chasing sensors costs more time and money than addressing the root cause—a faulty 1998 Bravada PCM.
Is Your Vehicle Showing These Symptoms?
A failing PCM can cause a wide range of confusing problems. If you’re experiencing any of the following, a replacement may be the answer:
- âś” Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- âś” The engine cranks but refuses to start.
- âś” Unexplained stalling or rough idling.
- âś” A noticeable drop in fuel economy.
- âś” Harsh or erratic automatic transmission shifting.
- âś” Failure to pass an emissions inspection.
- âś” Intermittent issues that seem to have no other cause.
Your Straightforward Installation Guide
Installing your pre-programmed 1998 Bravada PCM is a manageable job for most DIYers. Follow these general steps to ensure a smooth process:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- 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 the Connectors: Carefully unclip the wiring harness connectors from the old PCM. These connectors have locking tabs; be gentle to avoid breaking them.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Bolt your new, pre-programmed PCM into place and securely reconnect the wiring harnesses. Ensure they click into place.
- Reconnect the Battery: Reattach the negative battery terminal.
- Perform Security Relearn (If Necessary): Some vehicles require a simple security relearn procedure. Typically, this involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeating this two more times before starting the engine. Consult a service manual for your specific vehicle’s procedure.
Verified Vehicle Compatibility
This PCM, identified by part number 16266645 or service ID 9355699, is a direct replacement for a wide range of GM vehicles. Please verify the part number on your original module to ensure a perfect match. This unit fits the following models:
- âś” 1998 Oldsmobile Bravada (4.3L)
- âś” 1998-1999 Chevrolet & GMC C/K 1500, 2500, 3500 Pickups (Gasoline)
- âś” 1998-1999 Chevrolet Tahoe & GMC Yukon (Gasoline)
- âś” 1998-1999 Chevrolet Suburban (Gasoline)
- âś” 1998-1999 Chevrolet Express & GMC Savana Vans (Gasoline)
- âś” 1998 Chevrolet S10, GMC Sonoma, Chevrolet Blazer, GMC Jimmy (4.3L)
- âś” 1998 Isuzu Hombre (4.3L)
- âś” 1999 Cadillac Escalade
- âś” 1998 Chevrolet Astro & GMC Safari
- âś” 1998 GMC Envoy
Note: This is a partial list. Always match your part number or provide your VIN for guaranteed compatibility. This module replaces part numbers: 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, 9366810.
Frequently Asked Questions
Why do you need my VIN?
Your VIN (Vehicle Identification Number) is essential for us to program the 1998 Bravada PCM correctly. It allows us to load the exact software and calibrations your specific vehicle requires, including for the engine, transmission, and any factory options. This ensures seamless integration and performance.
Is this a new part?
No, this is a high-quality, tested used part sourced from a salvaged vehicle. Each unit is inspected and verified to be fully functional before being programmed and shipped. This provides a reliable and affordable alternative to a brand-new dealer part.
Will I need to do anything after installation?
While the unit is plug-and-play regarding engine software, many GM vehicles of this era require a security relearn procedure to allow the vehicle to start. Some may also require a Crankshaft Variation (CASE) relearn, which requires a capable scan tool, to clear a P1336 code, though the vehicle will still run and drive without it.
How do I find my original part number?
The part number is printed on a sticker on the PCM itself. You will need to locate the module on your vehicle to read the number. It will typically be a large 8-digit number, such as 16266645 or 09355699.