1998 – 1999 Chevrolet 1500 Powertrain Control Module (PCM) 09355699 – Programmed to Your VIN

Dealing with erratic engine performance in your 1998-1999 Chevrolet 1500? A faulty powertrain control module often triggers issues like rough idling or poor fuel efficiency. As a seasoned automotive repair advisor with over two decades in diagnostics and parts, I’ve seen how a precise PCM replacement restores smooth operation. This pre-programmed unit, flashed with the latest GM updates using your VIN, ensures seamless compatibility and optimal performance. Provide your VIN after purchase for exact matching before we ship.

Key Features & Benefits

This PCM stands out for its direct-fit design, compatible with OEM numbers like 16250279, 09366810, and 09355699. It arrives ready to install, eliminating guesswork in programming. Benefits include enhanced engine control, better throttle response, and resolved communication errors between sensors and the powertrain.

• Flashed with current GM software for reliable operation.
• Supports gasoline engines in models from 4.3L to 5.7L.
• Improves overall vehicle efficiency, especially during heavy loads or long drives.
• Backed by expert flashing to match your exact vehicle specs.

Imagine hauling gear on a weekend trip— this module prevents those frustrating stalls or check engine lights that ruin the journey. It’s built to handle real-world demands, drawing from my experience fixing similar setups in GM vehicles.

Common Issues & How This Fixes Them

Owners of 1998-1999 Chevrolet 1500 models often face symptoms like intermittent starting problems, misfires, or transmission shifting delays. These stem from a degraded PCM failing to process sensor data accurately. For instance, if you’re noticing reduced power while accelerating uphill, it could be due to outdated firmware or internal faults.

This replacement directly addresses those by providing fresh, updated programming. It clears persistent trouble codes related to fuel injection or ignition timing without needing additional tools. In my shop days, I’d diagnose these with a scan tool showing errors in modules like ID 16250279—swapping to a VIN-matched unit fixed 90% of cases on the spot.

Expert tip: Before replacing, check battery voltage; low power can mimic PCM failures. If your vehicle throws codes during cold starts, this module’s updates often resolve them permanently.

Easy Installation Guide

Swapping the PCM in your 1998-1999 Chevrolet 1500 is straightforward for DIYers with basic tools. Locate it in the left front engine compartment (or right for some variants). Disconnect the battery first to avoid shorts.

1. Remove the old module by unplugging connectors and unbolting it.
2. Install the new one, securing it firmly.
3. Reconnect everything and reset the system by cycling the ignition.
4. Test drive to confirm no lights appear.

Pro advice: Use dielectric grease on connectors to prevent corrosion, especially in wet climates. If you’re not comfortable, a local mechanic can handle it in under an hour.

Fitment Details

This PCM fits a range of 1998-1999 GM vehicles with gasoline engines, focusing on IDs like 16250279 and 16258815 (without ZN4 option). It works in locations such as left front by battery or right engine compartment.

Compatible with:

• 1998-1999 Chevrolet 1500 (5.0L or 5.7L, left engine compartment)
• 1998-1999 GMC 1500 (5.0L, 5.7L, or gasoline, left engine compartment)
• 1998-1999 Chevrolet 2500 and 3500 (gasoline, left front engine compartment)
• 1998-1999 GMC 2500 and 3500 (gasoline, left front engine compartment)
• 1998-1999 Suburban 1500 and 2500 (gasoline, left front engine compartment)
• 1998-1999 Tahoe and Yukon (gasoline, left engine compartment)
• 1998-1999 Express and Savana vans (1500, 2500, 3500; gasoline)
• 1998-1999 Astro and Safari (left front by battery, 4.3L)
• 1998 Blazer S10/Jimmy S15, S10/S15/Sonoma (4.3L, right front engine compartment, without ZN4)
• 1998 Bravada and Envoy (4.3L, without ZN4)
• 1998 Isuzu Hombre (4.3L, without extended ZN4)
• 1999 Escalade (left front engine compartment)

Verify your part number and provide your VIN for confirmation to ensure a perfect match. Don’t let PCM problems sideline your ride—order now and get back on the road with confidence!