2006 GMC Envoy XL Powertrain Control Module (PCM) 12597521 – Programmed to Your VIN

Imagine you’re heading out on a family road trip in your 2006 GMC Envoy XL, and suddenly the engine starts hesitating, throwing codes that leave you stranded. As a seasoned automotive repair advisor with over two decades in diagnostics and parts, I’ve seen this scenario play out too often with faulty powertrain control modules. This pre-programmed PCM, part number 12597521, arrives ready to restore smooth performance, flashed with the latest GM updates tailored to your VIN. Let’s dive into how it solves real-world problems and gets you back on the road confidently.

Key Features & Benefits

This PCM isn’t just a replacement—it’s a direct solution engineered for precision. We program it using your provided VIN, ensuring it matches your 2006 GMC Envoy XL’s exact specifications, including the 4.2L engine setup. It supports a wide array of compatible part numbers like 12569773, 12588650, and others up to 19209821, making it versatile for various GM vehicles.

• Latest GM Flashing: Incorporates recent factory calibrations to optimize fuel efficiency and emissions control, helping prevent recurring check engine lights.
• Plug-and-Play Readiness: Arrives fully configured, reducing downtime and eliminating the need for dealer visits.
• Enhanced Reliability: Addresses common electrical glitches that affect throttle response and idle stability, ideal for daily drives or towing trailers.
• Cost-Effective Fix: Avoid expensive diagnostics by swapping in this unit, which often clears issues like poor shifting or random stalling.

In my experience, owners of similar SUVs report better drivability after installation, especially in varying weather conditions where moisture can exacerbate module failures.

Common Issues & How This Fixes Them

Dealing with a failing PCM in your 2006 GMC Envoy XL? Symptoms often include intermittent no-start conditions, rough idling, or transmission that refuses to shift properly. I’ve diagnosed countless cases where corrosion or internal faults trigger diagnostic trouble codes (DTCs) such as P0601 (internal control module memory error) or P2135 (throttle position sensor correlation).

For instance, picture this: You’re accelerating onto the highway, and the engine cuts power unexpectedly—classic sign of a PCM communication breakdown. This programmed replacement resolves that by recalibrating sensors and actuators, restoring seamless engine management.

• Erratic Engine Behavior: Fixes misfires and hesitation by ensuring accurate fuel injection timing.
• Check Engine Light Persistence: Clears codes related to voltage irregularities, like P1682, through updated software.
• Transmission Glitches: Improves shift quality, preventing limp mode activation during heavy loads.
• No-Start Scenarios: Reestablishes ignition control, especially after battery issues or flooding events.

Expert Tip: Before replacing, scan for DTCs with an OBD-II tool. If codes point to the PCM, this unit often provides a lasting resolution without chasing wiring ghosts.

Easy Installation Guide

Swapping the PCM in your 2006 GMC Envoy XL is straightforward for most DIYers, taking about 30-45 minutes with basic tools. Locate it on the left-hand engine side (LH engine compartment). Disconnect the battery, remove the mounting bolts, unplug the harnesses, and install the new one. Reconnect everything, then clear any stored codes.

Pro Advice: After installation, drive a few cycles to allow the module to adapt. If you’re not comfortable, a local shop can handle it affordably—I’ve guided many through this to avoid common pitfalls like static damage to the unit.

Fitment Details

This PCM is specifically compatible with the 2006 GMC Envoy XL Electronic Control Module (LH engine, 4.2L). It also fits a range of other models for broader application:

• Colorado 04-06 (RH firewall)
• Rainier 06 (LH engine, 4.2L)
• Hummer H3 06 (RH firewall)
• Isuzu Ascender 06 (4.2L, LH engine)
• Isuzu I-350 06 (RH firewall)
• Trailblazer 06 (LH engine, 4.2L)
• Trailblazer EXT 06 (LH engine, 4.2L)
• Isuzu I-280 06 (RH firewall)
• Saab 9-7X 06 (LH engine, 6 cylinder, IDs 12569773 or 12597521)
• Canyon 04-06 (RH firewall)
• Envoy 06 (4.2L, LH engine)

Compatible with: 2006 GMC Envoy XL. Verify part numbers and provide your VIN for precise programming confirmation to ensure a perfect match.

Don’t let a glitchy PCM ruin your drives—order this programmed unit today and experience reliable performance tomorrow. Provide your VIN after purchase, and we’ll ship it fast. Act now to reclaim your Envoy XL’s power!