Description
Part Description
This engine control module (ECM) was removed from a 2013 GMC Terrain and has been professionally inspected for functionality. The unit carries OEM part number 12655476 with designation ABMU and is currently on our shelf ready for immediate shipment. This electronic control unit manages critical engine functions and has been tested to ensure proper operation.
The engine control module is the brain of your vehicle’s engine management system, controlling fuel injection, ignition timing, emissions systems, and other critical functions. ECMs commonly need replacement due to electrical failures, water damage, or internal component degradation that can cause poor engine performance, stalling, or no-start conditions. A faulty ECM will often trigger check engine lights and cause drivability issues.
At 603 Auto Salvage, we maintain over 50,000 quality used auto parts from more than 1,100 vehicles in our Plaistow, NH facility. Our experienced team carefully inspects each electronic component before it goes on our shelf. Contact us to verify compatibility with your specific vehicle or browse our extensive online inventory for additional GMC Terrain parts. 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) – Electronic Control Unit |
| Interchange # | 8060 |
| OEM Part Number | 12655476 |
| Side | N/A |
| Part Grade | X — Grade X – Inspected electronic control module, ready to ship |
| Warranty | 90-Day Warranty (Standard warranty for tested electronic control modules) |
| Type | Used OEM |
Vehicle Information (Donor)
| Year / Make / Model | 2013 GMC TERRAI |
| VIN | N/A |
| Vehicle Stock # | PCM3096 |
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) – Electronic Control Unit:
| ✅ Physical Housing Inspection | Case checked for cracks, corrosion, and connector damage |
| ✅ Connector Pin Condition | All electrical pins verified clean and undamaged |
| ✅ Internal Component Check | No visible signs of water damage or component failure |
| ✅ Part Number Verification | OEM part number 12655476 confirmed and documented |
Compatibility — What Vehicles Does This Part Fit?
Based on interchange #8060, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2013 | GMC | Terrain | Verify part number 12655476 matches your vehicle – 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 2013 GMC Terrain?
Yes, this engine control module will need to be programmed by a qualified technician or dealership to match your vehicle’s VIN and security system. Programming is required for proper operation and cannot be done without professional diagnostic equipment.
How do I know if my GMC Terrain ECM is failing?
Common symptoms include check engine lights, poor fuel economy, rough idling, stalling, or no-start conditions. You may also experience transmission shifting issues or other electronic system malfunctions since the ECM communicates with multiple vehicle systems.
Is this the correct part number for my 2013 GMC Terrain?
This ECM has part number 12655476 with ABMU designation. To ensure compatibility, check your current ECM’s part number or contact us with your VIN for verification. Different engine options may use different ECM part numbers.
What causes GMC Terrain ECMs to fail?
ECM failures can result from electrical surges, water damage, internal component wear, or corrosion. Jump-starting with reversed cables, alternator failures, or exposure to moisture are common causes that can damage the sensitive electronic components inside the control module.
Can I install this ECM myself?
While the physical installation involves unplugging the old unit and connecting the new one, professional programming is required afterward. The ECM must be programmed to your vehicle’s specifications and security system, which requires dealer-level diagnostic equipment and software.
Related Parts & Resources
OEM Part Numbers & Cross-Reference
Looking for this part by number? Here are the reference numbers:
| GM Part Number | 12655476 |
| Designation Code | ABMU |
| Interchange Number | 8060 |
Price Comparison — Why Used OEM Makes Sense
| Source | Price Range | Warranty | Notes |
|---|---|---|---|
| Dealer (New OEM) | $800-1200 | 1 year | Brand new, longest wait time |
| Aftermarket | $400-600 | Varies | Non-OEM fitment, quality varies |
| Other Salvage Yards | $150-250 | 30–60 days | Varies in quality and testing |
| 603 Auto Salvage | $75 | 90-Day Warranty | Tested, Grade X, ships in 24hrs |
Installation Notes
- Disconnect battery before removing old ECM to prevent electrical damage
- Take photos of connector positions before disconnection for reference
- Handle the ECM carefully and avoid static electricity – use anti-static precautions
- Ensure all connectors are fully seated and locked in place
- Have the new ECM programmed immediately after installation for proper operation
🔍 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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