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 OEM Engine Control Module (ECM) for 2005 Chevrolet Trailblazer with LH engine configuration. This electronic brain box controls critical engine functions and has been inspected and is ready to ship. Interchange #7122, Stock #PCM3890.
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This used OEM Engine Control Module (ECM) was removed from a 2005 Chevrolet Trailblazer donor vehicle. Also known as the engine brain box, this critical component carries OEM part number 12597072 and is designed for left-hand engine applications. The unit has been professionally inspected by our technicians and is currently on the shelf ready for immediate shipment.
The Engine Control Module serves as the central computer for your vehicle’s engine management system, controlling fuel injection, ignition timing, emissions systems, and various sensors. ECM failures are commonly caused by electrical surges, water damage, or internal component degradation over time, resulting in symptoms like rough idling, poor fuel economy, check engine lights, or complete engine shutdown. A properly functioning ECM is essential for optimal engine performance and emissions compliance.
At 603 Auto Salvage, we maintain an extensive inventory of over 50,000 quality used auto parts sourced from more than 1,100 vehicles. Our experienced team ensures each part meets our quality standards before it reaches our shelves. Contact us to verify compatibility with your specific vehicle or browse our website to explore our complete selection of Chevrolet parts and components. 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 (ECM) – Left Hand Engine |
| Interchange # | 7122 |
| OEM Part Number | 12597072 |
| Side | N/A |
| Part Grade | X — Grade X – Inspected and ready to ship, on shelf |
| Warranty | 90-Day Warranty (Standard warranty for electronic control modules) |
| Type | Used OEM |
| Year / Make / Model | 2005 CHEVROLET TRLBLZ |
| VIN | N/A |
| Vehicle Stock # | PCM3890 |
Every part at 603 Auto Salvage is inspected before listing. Here is what was verified on this Engine Control Module (ECM) – Left Hand Engine:
| ✅ Connector Pins | All pins intact and free of corrosion |
| ✅ Housing Integrity | No cracks or damage to ECM casing |
| ✅ Circuit Board | Internal components visually inspected |
| ✅ Mounting Points | All mounting tabs and brackets secure |
| ✅ Part Number Verification | Confirmed OEM part number 12597072 |
Based on interchange #7122, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2005 | Chevrolet | Trailblazer | LH engine configuration only – 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
This ECM is specifically for 2005 Trailblazer models with left-hand engine configuration. Contact us with your VIN to verify exact compatibility before purchase.
Yes, most ECMs require programming to match your vehicle’s VIN and specific options. This service is typically performed by a dealership or qualified automotive technician.
Common symptoms include check engine lights, rough idling, poor fuel economy, stalling, or the engine not starting at all. Professional diagnosis is recommended to confirm ECM failure.
This is a used original OEM Engine Control Module removed from a donor vehicle. It has been inspected and tested for functionality before being placed in inventory.
This ECM uses interchange number 7122, which helps identify compatible units across different part suppliers and salvage yards nationwide.
Looking for this part by number? Here are the reference numbers:
| GM Part Number | 12597072 |
| Interchange Number | 7122 |
| Stock Number | PCM3890 |
| 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 | $125-175 | 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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Drove from new york, Julie was a sweetheart asked questions to make sure that my ECU was the proper part number and was compatible with my manual Accord, price was phenomenal I highly recommend them for any parts your car may need. Definitely the best salvage yard around
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I had a great experience with 603 Auto Salvage Inc. The team was very helpful and quickly found the exact part I needed. They kept me informed and made the pickup process easy. The price was very fair, and the service was excellent. I would definitely recommend them and will use them again if I need parts in the future.
Excellent support, she helped me with my order service was fast and exactly what I needed.Very Professional.
The customer service at 603 was great. They found the part I needed very quickly and promptly notified me when it was ready to be picked up. There wasn’t any other place in the area that had what I needed. The price was very good also. I will be using them again for sure.
I had a great experience. They didn’t just look up the part I needed they took the time to explain how to install it and made sure I understood everything. I even received a call back, which I really appreciated. Everyone I spoke with was friendly and patient, and I never felt brushed off. I truly felt taken care of. Highly recommend if you want knowledgeable people who actually care about helping you. Kristy Thanks Guys!
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