Description
Part Description
This engine control module was removed from a 2003 GM Trucks SUB150 donor vehicle. The PCM (Powertrain Control Module) is located under the hood on the left front side beneath the battery. This unit has been inspected by our technicians and is currently on the shelf ready for immediate shipment.
The engine control module is the computer brain that manages your vehicle’s engine performance, fuel injection, ignition timing, and emissions systems. When these units fail, symptoms include rough idling, poor fuel economy, check engine lights, or complete engine shutdown. PCM failures are often caused by electrical surges, corrosion, or internal component wear over time.
603 Auto Salvage maintains over 50,000 quality used parts in stock from more than 1,100 vehicles. Our experienced team can help you find the exact PCM or other components you need. Browse our online inventory or call us to speak with a parts specialist about your specific vehicle requirements. 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 (PCM) – Electronic Control Unit |
| Interchange # | 7633 |
| OEM Part Number | 12586242 |
| Side | N/A |
| Part Grade | X — Grade X – Inspected electronic control module, ready to ship |
| Warranty | 90-Day Warranty (Standard warranty for electronic control modules) |
| Type | Used OEM |
Vehicle Information (Donor)
| Year / Make / Model | 2003 GM TRUCKS SUB150 |
| VIN | N/A |
| Vehicle Stock # | PCM5350 |
Our Testing & Inspection Process
Every part at 603 Auto Salvage is inspected before listing. Here is what was verified on this Engine Control Module (PCM) – Electronic Control Unit:
| ✅ Physical Housing | Inspected for cracks, corrosion, and connector damage |
| ✅ Connector Pins | Verified all pins are straight and free of corrosion |
| ✅ Internal Components | No visible signs of water damage or burning |
| ✅ Part Number Verification | Confirmed OEM part number 12586242 matches application |
Compatibility — What Vehicles Does This Part Fit?
Based on interchange #7633, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2003 | GM Trucks | SUB150 | Contact us for full compatibility list and programming requirements |
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
Does this PCM need to be programmed for my vehicle?
Yes, most engine control modules require programming to match your vehicle’s VIN and specific configuration. Contact your dealer or qualified technician for programming services.
What are common signs of PCM failure?
Common symptoms include check engine lights, rough idling, poor fuel economy, transmission shifting problems, or the engine not starting at all.
Is this the same as an ECM or ECU?
PCM (Powertrain Control Module) is similar to ECM (Engine Control Module) but typically controls both engine and transmission functions in one unit.
How do I know if this PCM will fit my GM truck?
Verify the interchange number 7633 matches your application, and confirm the OEM part number 12586242 is correct for your specific year and model.
What causes PCM failure in GM trucks?
Common causes include electrical surges from jump starting, water damage, overheating, or normal wear of internal components over time.
Related Parts & Resources
OEM Part Numbers & Cross-Reference
Looking for this part by number? Here are the reference numbers:
| GM Part Number | 12586242 |
| Interchange Number | 7633 |
| Location Code | YFXL |
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 removing or installing PCM to prevent electrical damage
- Use anti-static precautions when handling the electronic module
- Take photos of connector positions before disconnecting wiring harnesses
- Have the PCM programmed by a qualified technician before first startup
🔍 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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