1998 Chevrolet Blazer S10 GMC Jimmy S15 Powertrain Control Module (PCM) 09355699 – Programmed to Your VIN

Dealing with erratic engine performance in your 1998 Blazer S10 or Jimmy S15? A faulty powertrain control module often triggers symptoms like stalling during acceleration or unexplained check engine lights. As a seasoned automotive repair advisor with over two decades in diagnostics, I’ve seen countless GM owners restore smooth operation by replacing this critical component. This pre-programmed PCM, part number 09355699, arrives flashed with the latest GM updates tailored to your VIN, ensuring seamless integration and peak efficiency.

Key Features & Benefits

This module stands out for its VIN-specific programming, which matches your vehicle’s exact specifications right out of the box. You provide your VIN after purchase, and we handle the flashing before shipping—eliminating guesswork and dealer visits. Compatible with OEM numbers like 16250279, 09366810, and 09355699, it supports a range of 1998-1999 GM vehicles, including various trucks, vans, and SUVs.

• Restores optimal fuel management for better mileage and power delivery.
• Eliminates persistent diagnostic trouble codes (DTCs) such as P0601 (internal control module memory error) or P0300 (random misfire detected).
• Enhances transmission shifting, crucial for off-road adventures in your Blazer or Jimmy.
• Built to GM standards, it withstands harsh conditions like extreme temperatures or moisture exposure.

Imagine heading out for a weekend trail ride, only for your engine to hesitate on a steep incline. This PCM fixes that by recalibrating sensors and injectors, delivering reliable performance you can count on.

Common Issues & How This Fixes Them

Owners of 1998 Blazer S10 or Jimmy S15 models frequently report no-start conditions, especially after exposure to water or electrical shorts. A common culprit? Corrosion in the original PCM leading to failed communication with the engine’s systems. This replacement resolves that by providing a fresh, updated unit that clears codes like P0120 (throttle position sensor circuit) and restores normal operation.

Another scenario: Your vehicle idles roughly or surges unexpectedly while cruising highways. I’ve diagnosed this in shops where heat buildup damages the module’s circuitry. Installing this programmed PCM recalibrates timing and fuel curves, smoothing out the ride and preventing further breakdowns.

For those towing trailers, shifting irregularities can signal PCM failure—think delayed gear engagement causing strain. This part addresses it head-on, optimizing shift points for safer, more efficient hauling.

• Symptom: Check engine light with DTC P0420 (catalyst efficiency low). Fix: The new module recalibrates emissions controls, often resolving the issue without additional repairs.
• Symptom: Intermittent power loss in rain. Fix: Updated flashing improves moisture resistance, based on GM’s latest protocols.
• Expert Tip: Always scan for codes before replacement—use an OBD-II tool to confirm PCM-related faults and avoid misdiagnosis.

In my experience, addressing these early prevents cascading problems like damaged catalytic converters, saving you hundreds in repairs.

Easy Installation Guide

Swapping this PCM is straightforward for most DIY enthusiasts. Locate it on the right-hand front engine compartment (for Blazer/Jimmy models without ZN4 option). Disconnect the battery first to reset systems safely.

1. Remove the old module by unplugging connectors and unbolting it—takes about 10 minutes.
2. Install the new one in reverse order; no special tools needed beyond basic wrenches.
3. Reconnect the battery and clear any stored codes with a scanner.
4. Test drive to verify smooth performance; the VIN programming ensures it syncs immediately.

Pro tip: If you’re not comfortable, a local mechanic can handle it in under an hour. Always double-check for secure connections to avoid new issues.

Fitment Details

This PCM fits 1998 Chevrolet Blazer S10 and GMC Jimmy S15 models, specifically those without the ZN4 build date option, ID 16250279 or compatible. It also works with a broad array of 1998-1999 GM vehicles, such as various full-size trucks, Suburbans, Tahoes, Yukons, Express and Savana vans, Astros, Safaris, Envoys, Bravadas, S10/Sonoma, and even Isuzu Hombre with 4.3L engines.

Compatible with: 1998 Chevrolet Blazer S10 GMC Jimmy S15, plus select Escalade, Tahoe, Yukon, Suburban 1500/2500, Express/Savana vans (1500/2500/3500 gasoline), Astro/Safari, Envoy, Bravada, S10/Sonoma (4.3L without ZN4), and Isuzu Hombre (4.3L without ZN4). Verify part numbers like 16250279, 09366810, or 09355699; provide your VIN for precise matching and programming.

Don’t let a failing PCM sideline your adventures. Order now, send your VIN, and get back on the road with confidence—reliable fixes are just a click away!