Welcome to 603 Auto Salvage, We Sell Quality Used Auto Parts at Affordable prices.
Welcome to 603 Auto Salvage, We Sell Quality Used Auto Parts at Affordable prices.
$100.00
Used engine control module (PCM) for 2004 Chevrolet Trailblazer with LH engine configuration. This electronic control unit has been inspected and is ready to ship. Interchange #7122, Stock #PCM2763.
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This engine control module was removed from a 2004 Chevrolet Trailblazer donor vehicle and has been professionally inspected for functionality. The PCM features OEM part number 12590964 and is configured for left-hand engine applications. This electronic control unit is currently on our shelf and ready for immediate shipment to get your vehicle back on the road.
The engine control module, also known as the powertrain control module (PCM), is the computer brain that manages your vehicle’s engine and transmission operations. Common reasons for PCM replacement include electrical failures, water damage, internal component degradation, or diagnostic trouble codes that point to ECM malfunction. When your PCM fails, symptoms can include no-start conditions, poor fuel economy, transmission shifting problems, or multiple warning lights on your dashboard.
At 603 Auto Salvage, we maintain an inventory of over 50,000 used auto parts from more than 1,100 vehicles in our Plaistow, NH facility. Our experienced team carefully inspects each electronic component to ensure quality and reliability. Contact us to verify compatibility with your specific vehicle or browse our extensive online catalog for additional Chevrolet parts and accessories. 50,000+ parts in stock from over 1,100 vehicles. Contact us or call (603) 392-7313 for anything you need.
| Part | Engine Control Module (PCM) – Left Hand Engine |
| Interchange # | 7122 |
| OEM Part Number | 12590964 |
| Side | N/A |
| Part Grade | X — Grade X – Inspected electronic control module, ready to ship |
| Warranty | 90-Day Warranty (Standard warranty for tested electronic components) |
| Type | Used OEM |
| Year / Make / Model | 2004 CHEVROLET TRLBLZ |
| VIN | N/A |
| Vehicle Stock # | PCM2763 |
Every part at 603 Auto Salvage is inspected before listing. Here is what was verified on this Engine Control Module (PCM) – Left Hand Engine:
| ✅ Physical Housing Inspection | Checked for cracks, corrosion, and connector damage |
| ✅ Connector Pin Condition | Verified all pins are straight and free of corrosion |
| ✅ Internal Component Check | No signs of water damage or burnt components |
| ✅ Part Number Verification | Confirmed OEM part number 12590964 matches application |
Based on interchange #7122, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2004 | Chevrolet | Trailblazer | LH engine configuration only – Contact us for full compatibility verification |
Questions? Need a shipping quote? Call us now:
603 Auto Salvage | 233 Main St, Plaistow, NH 03865
Mon–Fri 8am–4:30pm | Sat 8am–2pm | Sun Closed
Yes, this engine control module will require programming by a qualified technician or dealership to match your vehicle’s VIN and security system. Programming ensures proper communication with other vehicle modules.
Common symptoms include engine cranking but not starting, multiple warning lights, poor fuel economy, transmission shifting issues, or diagnostic codes pointing to PCM communication problems. A professional diagnosis is recommended to confirm PCM failure.
This module is specifically for left-hand engine configurations with OEM part number 12590964. Contact us with your VIN to verify exact compatibility before ordering.
The interchange number 7122 helps identify compatible PCMs across different model years and similar GM vehicles. This standardized numbering system ensures you get the correct electronic module for your application.
While physical installation is straightforward, the PCM requires professional programming and may need security system relearning procedures. We recommend having the installation and programming performed by a qualified automotive technician.
Looking for this part by number? Here are the reference numbers:
| GM Part Number | 12590964 |
| Interchange Group | 7122 |
| Engine Configuration | Left Hand (LH) |
| Source | Price Range | Warranty | Notes |
|---|---|---|---|
| Dealer (New OEM) | $400-600 | 1 year | Brand new, longest wait time |
| Aftermarket | $250-400 | Varies | Non-OEM fitment, quality varies |
| Other Salvage Yards | $150-250 | 30–60 days | Varies in quality and testing |
| 603 Auto Salvage | $100 | 90-Day Warranty | Tested, Grade X, ships in 24hrs |
🔍 Free Fitment Check
Call us with your VIN and we will verify compatibility for free. No obligation, no pressure — just answers.
Our parts specialists check interchange data in real-time
This part ships via FedEx Ground. Prices are estimates — call for an exact quote to your zip code.
| Region | Estimated Cost | Transit Time |
|---|---|---|
| New England (NH, MA, ME, VT, CT, RI) | $15 – $30 | 1–3 business days |
| Northeast (NY, NJ, PA, MD, VA) | $20 – $40 | 2–4 business days |
| Southeast (FL, GA, NC, SC, TN) | $25 – $45 | 3–5 business days |
| Midwest (OH, MI, IL, IN, WI, MN) | $30 – $50 | 3–5 business days |
| Southwest (TX, AZ, NM, OK) | $35 – $55 | 4–6 business days |
| West Coast (CA, OR, WA) | $40 – $65 | 5–7 business days |
Local pickup is always free. Free delivery within 30 miles of Plaistow, NH.
Ready to order? Call (603) 392-7313 or add to cart above. We are here to help.
| Weight | 3 lbs |
|---|
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