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ACDelco D6257C - Combination Switch
Product Overview
The ACDelco D6257C Combination Switch is designed to ensure seamless operation of various vehicle functions, including headlight and turn signal control. Engineered to meet OE-level quality and reliability standards, this part guarantees a precise fitment for several Cadillac, Chevrolet, and GMC models. Trust in ACDelco's reputation for excellence in automotive parts, and experience peace of mind knowing your vehicle is equipped with a high-quality switch. Choose ACDelco D6257C for dependable performance and peace of mind every time you service your vehicle.
Cross Reference Numbers
This ACDelco D6257C is equivalent to or replaces the following part numbers:
Vehicle Compatibility
- Cadillac 2002 Escalade 5.3 V8
- Cadillac 2002 Escalade 6.0 V8
- Cadillac 2002 Escalade EXT 6.0 V8
- Chevrolet (1999-2000) Silverado 2500 5.3 V8
- Chevrolet (1999-2002) Silverado 1500 4.3 V6
- Chevrolet (1999-2002) Silverado 1500 4.8 V8
- Chevrolet (1999-2002) Silverado 1500 5.3 V8
- Chevrolet (1999-2002) Silverado 2500 6.0 V8
- Chevrolet (2000-2002) Suburban 1500 5.3 V8
- Chevrolet (2000-2002) Tahoe 4.8 V8
This also fits other applications. Please use the vehicle selector tool to verify fitment.
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Frequently Asked Questions
What is the function of the ACDelco D6257C Combination Switch?
The ACDelco D6257C Combination Switch controls various vehicle functions such as headlights and turn signals, ensuring safe and efficient operation.
How do I know if the ACDelco D6257C will fit my vehicle?
To ensure compatibility, please use the vehicle selector tool on our website or refer to the listed compatible vehicles for the ACDelco D6257C.
What should I do if my Combination Switch triggers a warning light?
If your vehicle's warning lights are activated, it might indicate a malfunction with the switch. Common Diagnostic Trouble Codes (DTCs) that may relate to combination switches include P0460, P0461, and P0462. Consider replacing your ACDelco D6257C if issues persist.
Can I install the ACDelco D6257C Combination Switch myself?
Yes, if you have basic automotive repair skills and tools, you can install the ACDelco D6257C Combination Switch yourself. However, for best results, professional installation is recommended.
Where can I purchase the ACDelco D6257C Combination Switch?
You can purchase the ACDelco D6257C Combination Switch directly from our website for a factory-correct replacement that restores safety and performance. Order ACDelco D6257C today!
- BrandACDelco
- ManufacturerACDelco
- MPND6257C
- FeaturesConnector Color : Green/Black/Gray
Connector Gender : Male
Connector Shape : Rectangular and Square
Housing Material : Plastic
Illuminated : No
Indicator Markings : Yes
Indicator Markings Color : White
Lever Color : Black with White Letters
Lever Included : Yes
Mounting Bracket Included : Yes
Switch Activation Type : Lever
Switch Position Quantity : 6
Terminal Gender : Female
Terminal Quantity : 34
Terminal Type : Blade
Universal Or Specific Fit : Specific
Voltage : 12
Wire Harness Included : YES - Part TypeCombination Switch
- Fitment
- Fitment TypeVehicle Specific
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 1999 | Chevrolet | Silverado 1500 | Base (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | Chevrolet | Silverado 1500 | LS (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | Chevrolet | Silverado 1500 | LT (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | Chevrolet | Silverado 1500 | Base (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | Chevrolet | Silverado 1500 | LS (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | Chevrolet | Silverado 1500 | LT (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | Chevrolet | Silverado 1500 | Base (4.8 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | Chevrolet | Silverado 1500 | LS (4.8 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | Chevrolet | Silverado 1500 | LT (4.8 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | Chevrolet | Silverado 2500 | Base (6.0 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | Chevrolet | Silverado 2500 | LS (6.0 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | Chevrolet | Silverado 2500 | LT (6.0 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | Chevrolet | Silverado 2500 | Base (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | Chevrolet | Silverado 2500 | LS (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | Chevrolet | Silverado 2500 | LT (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | GMC | Sierra 1500 | SL (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | GMC | Sierra 1500 | SLE (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 1999 | GMC | Sierra 1500 | SLT (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | Chevrolet | Silverado 1500 | Base (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | Chevrolet | Silverado 1500 | LS (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | Chevrolet | Silverado 1500 | LT (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | Chevrolet | Silverado 1500 | Base (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | Chevrolet | Silverado 1500 | LS (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | Chevrolet | Silverado 1500 | LT (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | Chevrolet | Silverado 1500 | Base (4.8 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | Chevrolet | Silverado 1500 | LS (4.8 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | Chevrolet | Silverado 1500 | LT (4.8 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | Chevrolet | Silverado 2500 | Base (6.0 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | Chevrolet | Silverado 2500 | LS (6.0 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | Chevrolet | Silverado 2500 | LT (6.0 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | Chevrolet | Silverado 2500 | Base (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | Chevrolet | Silverado 2500 | LS (5.3 V8 GAS) | |
| 2000 | GMC | Sierra 1500 | SL (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | GMC | Sierra 1500 | SLE (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2000 | GMC | Sierra 1500 | SLT (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 1500 | Base (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 1500 | LS (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 1500 | LT (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 1500 | Base (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 1500 | LS (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 1500 | LT (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 1500 | Base (4.8 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 1500 | LS (4.8 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 1500 | LT (4.8 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 2500 HD | Base (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 2500 HD | LS (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 2500 HD | LT (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 3500 | Base (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 3500 | LS (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 3500 | LT (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 1500 HD | LS (6.0 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | Chevrolet | Silverado 1500 HD | LT (6.0 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | GMC | Sierra 1500 | SL (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | GMC | Sierra 1500 | SLE (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | GMC | Sierra 1500 | SLT (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2001 | GMC | Sierra 2500 HD | SL (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2001 | GMC | Sierra 2500 HD | SLE (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2001 | GMC | Sierra 2500 HD | SLT (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2001 | GMC | Sierra 3500 | SL (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2001 | GMC | Sierra 3500 | SLE (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2001 | GMC | Sierra 3500 | SLT (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 1500 | Base (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 1500 | LS (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 1500 | LT (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 1500 | WT (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 1500 | Base (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 1500 | LS (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 1500 | LT (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 1500 | WT (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 1500 | Base (4.8 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 1500 | LS (4.8 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 1500 | LT (4.8 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 1500 | WT (4.8 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 2500 HD | Base (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 2500 HD | LS (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 2500 HD | LT (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 3500 | Base (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 3500 | LS (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 3500 | LT (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Avalanche 1500 | Base (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Avalanche 1500 | North Face (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Avalanche 1500 | On Road Edition (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Avalanche 1500 | Z71 (5.3 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 1500 HD | LS (6.0 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | Chevrolet | Silverado 1500 HD | LT (6.0 V8 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | GMC | Sierra 1500 | Base (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | GMC | Sierra 1500 | HT (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | GMC | Sierra 1500 | SL (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | GMC | Sierra 1500 | SLE (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | GMC | Sierra 1500 | SLT (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | GMC | Sierra 1500 | WT (4.3 V6 GAS) | Notes: CRUISE CONTROL(K34) |
| 2002 | GMC | Sierra 2500 HD | Base (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | GMC | Sierra 2500 HD | SL (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | GMC | Sierra 2500 HD | SLE (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | GMC | Sierra 2500 HD | SLT (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | GMC | Sierra 3500 | Base (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | GMC | Sierra 3500 | SL (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | GMC | Sierra 3500 | SLE (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | GMC | Sierra 3500 | SLT (6.6 V8 DIESEL) | Notes: CRUISE CONTROL(K34) |
| 2002 | Cadillac | Escalade | Base (6.0 V8 GAS) | Notes: CRUISE CONTROL(K34) |
Warranty Overview
At Newparts, we stand behind the quality of the products we sell. Every part we offer is backed by a warranty designed to give you peace of mind and protect your investment.
Standard Warranty – Most Parts
Coverage: 2 years or 24,000 miles (whichever comes first) from purchase date.
Protection: Defects in materials or workmanship under normal personal use.
Eligibility: Applies only to the original purchaser and the vehicle where the part was first installed.
Exclusions:
Wear-and-tear items (brake pads, filters, bulbs, wipers, etc.)
Commercial, fleet, rideshare, off-road, or racing use
Improper installation, misuse, accidents, or modifications
Not Covered: Labor, shipping, towing, or incidental costs.
Bison Performance Warranty – Our House Brand
Coverage: Limited Lifetime Warranty for as long as you own your vehicle.
Applies To: All products sold under the Bison Performance label.
Premium Protection: Goes beyond our standard warranty — if it’s a Bison product, the 2-year/24k mile limit is replaced with lifetime coverage.
Exclusions: Same as the standard warranty (normal wear, commercial use, improper installation, etc.).
What’s Included: Replacement of the defective product (labor and shipping excluded).
Warranty Claim Requirements
To keep claims fast and fair, we require:
Proof of purchase (invoice or order confirmation).
Photos or videos showing the defective part, order number, date, VIN, and odometer reading.
Diagnostic reports or part returns for non-visible issues may be requested.
Claims must be truthful, properly documented, and reflect normal consumer use.
Buy With Confidence: We back our products because we believe in their quality, with a transparent, customer-first warranty process you can trust. And with Bison Performance products, you’ll enjoy Limited Lifetime protection—an assurance few brands can match.
For full details and exclusions, please see our complete Warranty Terms & Conditions.
This summary is for convenience only. For full warranty coverage details, exclusions, and requirements, see our official Warranty Terms & Conditions. In case of conflict, the full policy governs.
Return Policy Overview
Most parts can be returned within 30 days of delivery if unused, uninstalled, and in original packaging.
To start a return, use our Return Portal or contact support.
Restocking fee: Up to 20% may apply for certain orders (buyer’s remorse, order errors, or special-order items)
Refunds: Issued to your original payment method within 3–5 business days after inspection
Exchanges: Not automatic — please return and reorder
Replacements: May be approved for incorrect or defective items reported within 7 days
Not returnable:
Used or installed parts
Electrical components
Opened filter kits, gaskets, or contaminated items
Final sale or custom orders
Important Notes:
Return shipping is your responsibility unless we made a verified error
Fitment is the customer’s responsibility (we can assist, but do not guarantee)
Country of origin may vary and is not grounds for return
For complete details, please see our full Return Policy.
This Returns summary is provided for convenience only. All returns, refunds, and exchanges are subject to the complete Returns Policy. In the event of any conflict, the full policy governs.
Fast, Reliable Shipping — Straight to Your Door
We ship most orders the same day when placed before 2 PM CST (Monday–Friday). Our main warehouse is just east of Nashville, TN, and we also ship from multiple locations nationwide to get your order to you as quickly as possible.
We use trusted carriers like UPS, FedEx, and USPS.
Tracking info is emailed to you as soon as your order ships.
Delivery estimates at checkout are based on carrier data, but not guaranteed.
Need help with a shipment?
If your order is missing, damaged, or incorrect, just let us know within 5 days of delivery. We’ll walk you through the quick claim process — including a few photos to help us make things right.
For full details, please see our complete Shipping Policy.
This Shipping summary is provided for convenience only. Delivery times, carrier terms, fees, restrictions, risk of loss, and other details are governed by our complete Shipping Policy. In the event of any conflict, the full policy governs.






