Description
Part Description
This OEM alternator was removed from a 2014 GM Trucks Silverado 1500 equipped with the 5.3L engine. The unit is a 150-amp alternator with option code KG4 and has been thoroughly inspected by our technicians. This part is currently on our shelf and ready to ship immediately upon order.
Alternators are critical components that charge your vehicle’s battery and power electrical systems while the engine runs. Common failure symptoms include dimming headlights, dashboard warning lights, dead batteries, or grinding noises from the alternator. When your Silverado’s alternator fails, replacing it with a quality used OEM part like this one ensures reliable performance at a fraction of the cost of a new unit.
At 603 Auto Salvage, we maintain over 50,000 used auto parts in stock from more than 1,100 vehicles. Our experienced team carefully inspects each alternator before it goes on the shelf. Need this alternator or have questions about compatibility? Browse our online inventory or contact our parts specialists who can help you find the exact part you need for your GM truck. 50,000+ parts in stock from over 1,100 vehicles. Contact us or call (603) 392-7313 for anything you need.
Part Specifications
| Part | Alternator Assembly – 150 Amp (Option KG4) |
| Interchange # | 10010 |
| OEM Part Number | Contact for OEM# |
| Side | N/A |
| Part Grade | A — Grade A – 155K miles, inspected and ready to ship |
| Warranty | 90-Day Warranty (Standard coverage for electrical components with moderate mileage) |
| Type | Used OEM |
Vehicle Information (Donor)
| Year / Make / Model | 2014 GM TRUCKS SILV15 |
| VIN | N/A |
| Vehicle Stock # | 0126328583 |
Our Testing & Inspection Process
Every part at 603 Auto Salvage is inspected before listing. Here is what was verified on this Alternator Assembly – 150 Amp (Option KG4):
| ✅ Electrical Output Test | Verified proper amperage output and voltage regulation |
| ✅ Bearing Condition | Smooth rotation with no grinding or excessive play |
| ✅ Case and Housing | No cracks or damage to alternator housing |
| ✅ Pulley Alignment | Pulley properly aligned and securely attached |
| ✅ Connector Integrity | All electrical connections clean and undamaged |
| ✅ Mounting Points | All mounting brackets and bolt holes intact |
Compatibility — What Vehicles Does This Part Fit?
Based on interchange #10010, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2014 | GM Trucks | Silverado 1500 | 5.3L engine with 150-amp option KG4 – 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 alternator fit my 2014 Silverado 1500?
This alternator fits 2014 Silverado 1500 models with the 5.3L engine and 150-amp electrical system (option KG4). Contact us with your VIN to verify exact compatibility for your specific truck.
How do I know if my Silverado alternator is failing?
Common signs include dimming headlights, dashboard battery warning light, dead battery after sitting overnight, or grinding/whining noises from the alternator area. A voltmeter test can confirm alternator output.
What’s included with this used alternator?
You receive the complete alternator assembly as shown, including the pulley and all attached components. The unit has been tested and inspected for proper operation.
Is this alternator better than a remanufactured unit?
This is an original GM factory alternator, not a rebuilt unit. OEM parts often provide superior fit, finish, and longevity compared to aftermarket or remanufactured alternatives.
Can I install this alternator myself?
Installation requires basic mechanical skills and tools. You’ll need to disconnect the battery, remove the serpentine belt, disconnect electrical connections, and unbolt the old alternator. Professional installation is recommended if you’re not comfortable with automotive electrical work.
Related Parts & Resources
OEM Part Numbers & Cross-Reference
Looking for this part by number? Here are the reference numbers:
| Interchange Number | 10010 |
| Option Code | KG4 |
| Output Rating | 150 Amp |
| Engine Application | 5.3L |
Price Comparison — Why Used OEM Makes Sense
| Source | Price Range | Warranty | Notes |
|---|---|---|---|
| Dealer (New OEM) | $280-$350 | 1 year | Brand new, longest wait time |
| Aftermarket | $120-$180 | Varies | Non-OEM fitment, quality varies |
| Other Salvage Yards | $85-$110 | 30–60 days | Varies in quality and testing |
| 603 Auto Salvage | $75 | 90-Day Warranty | Tested, Grade A, ships in 24hrs |
Installation Notes
- Disconnect the negative battery cable before starting any alternator work
- Take a photo of electrical connections before removal to ensure proper reconnection
- Use a serpentine belt tool to properly tension the belt during installation
- Clean all electrical connections with contact cleaner before reassembly
- Test the charging system after installation to verify 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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