Description
Part Description
This engine control module (ECM) was removed from a 2007 Chevrolet Trailblazer and carries OEM part number 12611769. The unit has been thoroughly inspected by our experienced technicians and is currently on our shelf ready for immediate shipment. This is the left-hand engine ECM variant that controls critical engine functions and performance parameters.
The engine control module is the brain of your vehicle’s engine management system, controlling fuel injection, ignition timing, emissions systems, and other vital engine functions. ECMs commonly fail due to electrical surges, water damage, or internal component degradation over time. When your ECM fails, you may experience no-start conditions, poor fuel economy, rough idle, or various engine performance issues that require immediate replacement.
At 603 Auto Salvage, we maintain an inventory of over 50,000 quality used auto parts from more than 1,100 vehicles. Our experienced team carefully inspects each part to ensure it meets our quality standards. Contact us to verify compatibility with your specific vehicle or browse our extensive online inventory 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 Specifications
| Part | Engine Control Module (ECM) – Left Hand Engine |
| Interchange # | 744 |
| OEM Part Number | 12611769 |
| Side | N/A |
| Part Grade | X — Grade X – Inspected and ready to ship, stored on shelf |
| Warranty | 90-Day Warranty (Standard warranty for electronic control modules) |
| Type | Used OEM |
Vehicle Information (Donor)
| Year / Make / Model | 2007 CHEVROLET TRLBLZ |
| VIN | N/A |
| Vehicle Stock # | PCM0637 |
Our Testing & Inspection Process
Every part at 603 Auto Salvage is inspected before listing. Here is what was verified on this Engine Control Module (ECM) – 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 visible signs of water damage or burnt components |
| ✅ Part Number Verification | Confirmed OEM part number 12611769 matches application |
Compatibility — What Vehicles Does This Part Fit?
Based on interchange #744, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2007 | Chevrolet | Trailblazer | Left-hand engine application – Contact us for full compatibility list |
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
Warranty & Shipping
Frequently Asked Questions
Will this ECM need to be programmed for my 2007 Trailblazer?
Yes, this ECM will likely need to be programmed by a qualified technician or dealership to match your vehicle’s VIN and security system. Programming ensures proper communication with other vehicle modules.
How do I know if my engine control module is failing?
Common symptoms include check engine lights, no-start conditions, poor fuel economy, rough idle, stalling, or erratic engine performance. A diagnostic scan can help confirm ECM-related fault codes.
Is this the correct ECM for left-hand engine applications?
Yes, this is specifically the left-hand engine ECM variant with part number 12611769. Contact us to verify compatibility with your specific engine configuration and VIN.
What causes engine control modules to fail?
ECMs commonly fail due to electrical surges, water damage from floods or leaks, overheating, vibration damage, or normal wear of internal components over time. Power supply issues can also damage the module.
Can I install this ECM myself?
While physical installation is straightforward, the ECM requires professional programming to your vehicle’s specifications. We recommend having it installed and programmed by a qualified automotive technician.
Related Parts & Resources
OEM Part Numbers & Cross-Reference
Looking for this part by number? Here are the reference numbers:
| GM Part Number | 12611769 |
| Interchange Number | 744 |
| Stock Number | PCM0637 |
Price Comparison — Why Used OEM Makes Sense
| 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 |
Installation Notes
- Disconnect battery before installation and wait 10 minutes to discharge capacitors
- Use anti-static precautions when handling the ECM to prevent damage to sensitive electronics
- Ensure all electrical connections are clean and properly seated before powering up
- Have the ECM professionally programmed with your vehicle’s VIN and calibration data
🔍 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
Estimated Shipping Costs by Region
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.
Why Buy From 603 Auto Salvage?
- 50,000+ parts in stock from over 1,100 vehicles on-site in Plaistow, NH
- Every part inspected before listing — no guesswork
- Family-owned salvage yard — real people, not a call center
- 90-Day Warranty on this part
- Fast shipping — most orders ship within 24 hours
- Competitive pricing — save 50–70% vs dealer prices
- Serving New Hampshire, Massachusetts & all 50 states
Ready to order? Call (603) 392-7313 or add to cart above. We are here to help.




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