1998-1999 Yukon PCM 09355699 | Programmed to Your VIN | Engine Computer

Restore Your Truck’s Performance and Reliability

Is your 1998-1999 GMC Yukon, Chevy Tahoe, or Suburban giving you headaches? If you’re dealing with frustrating issues like a no-start condition, intermittent stalling, poor fuel mileage, or a persistent check engine light, the problem often points directly to a failing Powertrain Control Module (PCM). As the brain of your vehicle, the PCM controls everything from fuel delivery and spark timing to transmission shifting. When it starts to fail, it can cause a cascade of confusing and debilitating problems.

This isn’t just another part; it’s a direct solution. We offer a dependable, tested, used OEM PCM that gets you back on the road without the astronomical cost of a new unit from the dealership. The best part? We handle the programming for you. Simply provide your vehicle’s VIN after purchase, and we will flash this computer with the latest official GM software updates specific to your truck. This ensures optimal performance and resolves many of the factory bugs that existed in the original software. This is the smart, efficient fix you’ve been looking for.

Is Your GM Truck Showing These Symptoms?

• ✔ Engine cranks but will not start.
• ✔ Intermittent stalling or rough idling for no apparent reason.
• ✔ Drastic decrease in fuel economy.
• ✔ Harsh or erratic automatic transmission shifting.
• ✔ Check Engine Light is on with PCM-related Diagnostic Trouble Codes (DTCs) like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
• ✔ Loss of communication with the scan tool.

A Straightforward Guide to Installation

Installing your pre-programmed 1998-1999 Yukon PCM is a job most DIYers can handle in under an hour with basic hand tools. Our pre-flashing service means you skip the expensive trip to the dealer for programming.

1. Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
2. Locate the PCM: On most of these trucks and vans, the PCM is located in the engine compartment, typically on the driver’s side fender well or near the firewall.
3. Disconnect the Wiring: Carefully unplug the electrical connectors from the old PCM. There are usually locking tabs that need to be released. Take your time to avoid damaging the pins or clips.
4. Remove the Old Unit: Unbolt the old PCM from its mounting bracket. It’s usually held in by a few 10mm or 13mm bolts.
5. Install the New PCM: Mount the replacement PCM onto the bracket and securely plug in the wiring harnesses. You should hear a ‘click’ as they lock into place.
6. Reconnect the Battery: Reattach the negative battery terminal.
7. Perform Security Relearn: In many cases, you will need to perform a simple security relearn procedure. 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. This allows the new PCM to sync with your vehicle’s anti-theft system.

Verified Vehicle Compatibility

This module is a direct replacement for service number 09355699 and is interchangeable with part numbers 16266645, 16250279, 16258815, and 09366810. It is verified to fit the following models, provided the ID on your original module is 09355699:

• Cadillac Escalade: 1999
• Chevrolet Trucks: 1500, 2500, 3500 Pickup (1998-1999, Gasoline)
• Chevrolet SUVs: Blazer S10, Suburban 1500/2500, Tahoe (1998-1999)
• Chevrolet Vans: Astro, Express 1500/2500/3500 (1998-1999, Gasoline)
• GMC Trucks: 1500, 2500, 3500 Pickup (Sierra), S15 Sonoma (1998-1999, Gasoline)
• GMC SUVs: Jimmy S15, Envoy, Yukon (1998-1999)
• GMC Vans: Safari, Savana 1500/2500/3500 (1998-1999, Gasoline)
• Isuzu Hombre: 1998 (4.3L)
• Oldsmobile Bravada: 1998