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          ACDelco 748Q - Spark Plug Wire Set

          MPN: 748Q
          0.0
          Vehicle Specific
          Check if this part fits your vehicle.
          • $98.95
          In stock

          Product Overview

          The ACDelco 748Q Spark Plug Wire Set is designed to provide optimal performance and reliability for your vehicle's ignition system. This high-quality wire set ensures a superior connection between the spark plugs and the ignition coil, enhancing engine performance and efficiency. Manufactured to meet OE specifications, the ACDelco 748Q guarantees a precise fit for select Cadillac models, ensuring longevity and dependable operation. Trust ACDelco, a brand renowned for its commitment to quality and performance. Choose ACDelco 748Q for dependable performance and peace of mind every time you service your vehicle.

          Cross Reference Numbers

          This ACDelco 748Q is equivalent to or replaces the following part numbers:

          Vehicle Compatibility

          • Cadillac DeVille (1998-1999) 4.6 V8
          • Cadillac Eldorado (1998-1999) 4.6 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 748Q Spark Plug Wire Set?

          The ACDelco 748Q Spark Plug Wire Set transmits electrical signals from the ignition coil to the spark plugs, ensuring proper engine ignition and performance.

          How do I know if the ACDelco 748Q is compatible with my vehicle?

          To determine if the ACDelco 748Q is compatible, please refer to our vehicle selector tool or check your vehicle's specifications for fitment.

          What are some common symptoms of faulty spark plug wires?

          Common symptoms include misfiring, poor fuel economy, rough idling, and difficulty starting the engine, which may require replacement with the ACDelco 748Q for optimal performance.

          How often should I replace my spark plug wires?

          It's recommended to replace spark plug wires every 60,000 to 100,000 miles, or if you notice any signs of wear or performance issues.

          Where can I buy the ACDelco 748Q Spark Plug Wire Set?

          You can purchase the ACDelco 748Q Spark Plug Wire Set directly from our website for a factory-correct replacement that restores safety and performance.

          Order ACDelco 748Q today for a factory-correct replacement that restores safety and performance.

            • Newparts SKU
              1720753
            • Weight
              2.44 lbs
            • Dimensions (L x W x H)
              3.8 x 10 x 6 in
            • Manufacturer Part #
              748Q
          • Brand
            ACDelco
          • Manufacturer
            ACDelco
          • MPN
            748Q
          • Features
            Boot Type : SOLID
            Coil End Boot Color : Black
            Core Material : Fiberglass Reinforced Latex Graphite
            Distributor Coil End Boot Type : Silicone Angled
            Distributor Coil End Terminal Type : Snap Lock
            Insulation Color : Black
            Insulation Material : Silicone
            Insulation Outside Diameter : 0.27
            Length : 44.3
            Noise Suppression Type : YES
            Spark Plug Boot Material : Silicone
            Spark Plug End Boot Color : Black
            Spark Plug End Boot Quantity Angled : 8
            Spark Plug End Terminal Type : Snap Lock
            Universal Or Specific Fit : Specific
            Wire Separators Included : No
          • Part Type
            Spark Plug Wire Set
          • Fitment
            • Fitment Type
              Vehicle Specific
          YearMakeModelSubmodelNotes
          1999CadillacEldoradoESC (4.6 V8 GAS)Engine: LD8, Engine: L37, VIN: Y, VIN: 9, Notes: CONTAINS ALL 8 SPLG WIRES
          1999CadillacEldoradoETC (4.6 V8 GAS)Engine: LD8, Engine: L37, VIN: Y, VIN: 9, Notes: CONTAINS ALL 8 SPLG WIRES
          1999CadillacDeVilleBase (4.6 V8 GAS)Engine: LD8, VIN: Y, Notes: CONTAINS ALL 8 SPLG WIRES
          1999CadillacDeVilleConcours (4.6 V8 GAS)Engine: L37, VIN: 9, Notes: CONTAINS ALL 8 SPLG WIRES
          1999CadillacDeVilled'Elegance (4.6 V8 GAS)Engine: LD8, VIN: Y, Notes: CONTAINS ALL 8 SPLG WIRES
          1998CadillacEldoradoESC (4.6 V8 GAS)Engine: L37, Engine: LD8, VIN: 9, VIN: Y, Notes: CONTAINS ALL 8 SPLG WIRES
          1998CadillacEldoradoETC (4.6 V8 GAS)Engine: L37, Engine: LD8, VIN: 9, VIN: Y, Notes: CONTAINS ALL 8 SPLG WIRES
          1998CadillacDeVilleBase (4.6 V8 GAS)Engine: LD8, VIN: Y, Notes: CONTAINS ALL 8 SPLG WIRES
          1998CadillacDeVilleConcours (4.6 V8 GAS)Engine: L37, VIN: 9, Notes: CONTAINS ALL 8 SPLG WIRES
          1998CadillacDeVilled'Elegance (4.6 V8 GAS)Engine: LD8, VIN: Y, Notes: CONTAINS ALL 8 SPLG WIRES
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          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.

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