BDFHYK D503A ignition coil pack for Buick Cadillac Chevy

BDFHYK D503A OE-style replacement ignition coil detail

BDFHYK DR-37 GN10048 reference ignition coil pack

BDFHYK ignition coil for listed Buick Century Roadmaster applications

BDFHYK ignition coil for Cadillac Brougham Fleetwood applications

BDFHYK D503A coil connector and mounting detail

BDFHYK OE-style D503A ignition coil single pack

BDFHYK 1PC Ignition Coil Pack D503A for Buick Century, Cadillac Brougham, Chevy C1500

$16.99

Product Detail

Type Ignition Coil
SKU BDDLZ-BD-05-11313
OE Number D503A, DR-37, GN10048, GN10290, GN10291, GN10386, 3IC108, 49035, U1054, C-611, DR37T, 920-1004, V51-70-0012

🚚 Estimated Delivery: Calculating...

Ships by Calculating... · Free Shipping

Trust & Assurance

Free Shipping · 2–7 Business Days

12-Month Warranty

30-Day Return

Secured Payment

D503A Ignition Coil Pack for Buick, Cadillac, Chevrolet, Geo, and GMC

BDFHYK D503A ignition coil pack is designed for compatible Buick, Cadillac, Chevrolet, Geo, and GMC applications that use the same coil reference. Confirm the year, model, engine, connector shape, mounting style, and OE reference before ordering.

Compatible Vehicle Groups

Make	Models	Fitment Check
Buick	Century, Roadmaster, Skyhawk, Skylark, Somerset, Somerset Regal	Match D503A-style coil, connector, and mounting points.
Cadillac	Brougham, Cimarron, Fleetwood	Confirm OE reference and ignition layout.
Chevrolet	C1500	Compare removed coil and service information.
Geo	Storm	Verify connector and coil body design.
GMC	C1500, C1500 Suburban, C2500	Confirm engine, connector, and mounting style.

Reference Numbers

D503A, DR-37, DR37T, GN10048, GN10290, GN10291, GN10386
3IC108, 49035, U1054, C-611, 920-1004, V51-70-0012
Package includes: 1 ignition coil pack

When to Check the Ignition Coil

A weak ignition coil may contribute to hard starting, rough idle, hesitation, weak acceleration, poor fuel economy, misfire symptoms, or a check engine light. Similar symptoms can also come from spark plugs, wires, fuel delivery, air leaks, sensors, or engine mechanical issues.

Installation Notes

Install on a cool engine, inspect the connector and wiring, and confirm that the mounting points align before tightening. BDFHYK ignition coils are OE-style aftermarket replacement parts, not factory-branded vehicle manufacturer parts.

Technical Specifications

Brand & Part Reference	BDFHYK D503A Ignition Coil Pack
Package Includes	1 ignition coil pack
Replacement Type	OE-style aftermarket ignition coil replacement
Reference Numbers	D503A, DR-37, DR37T, GN10048, GN10290, GN10291, GN10386, 3IC108, 49035, U1054, C-611, 920-1004, V51-70-0012
Buick Fitment	Buick Century, Roadmaster, Skyhawk, Skylark, Somerset, and Somerset Regal applications using D503A-style coil design
Cadillac Fitment	Cadillac Brougham, Cimarron, and Fleetwood applications using D503A-style coil design
Chevrolet Fitment	Chevrolet C1500 applications using D503A-style coil design
Geo Fitment	Geo Storm applications using D503A-style coil design
GMC Fitment	GMC C1500, C1500 Suburban, and C2500 applications using D503A-style coil design
Fitment Checks	Confirm year, model, engine, connector shape, mounting style, and OE reference before installation
Common Symptoms	Hard starting, rough idle, hesitation, weak acceleration, poor fuel economy, misfire symptoms, check engine light
Installation Notes	Install on a cool engine and inspect connector, wiring, and mounting points
Important Note	This is not a factory-branded Buick, Cadillac, Chevrolet, Geo, or GMC part

Q: Will this D503A ignition coil fit my vehicle?
A: It is designed for compatible Buick, Cadillac, Chevrolet, Geo, and GMC applications using a matching D503A-style coil. Confirm year, model, engine, connector, mounting style, and OE reference before ordering.

Q: What is included?
A: Package includes 1 ignition coil pack.

Q: Which reference numbers should I compare?
A: Compare D503A, DR-37, DR37T, GN10048, GN10290, GN10291, GN10386, 3IC108, 49035, U1054, C-611, 920-1004, and V51-70-0012 with the original coil.

Q: Are spark plugs included?
A: No. Package includes one ignition coil pack only.

Q: What symptoms may indicate a weak ignition coil?
A: Hard starting, rough idle, hesitation, weak acceleration, poor fuel economy, misfire symptoms, and a check engine light may be related to a weak coil.

Q: Can this coil fix a misfire?
A: It may help only when the ignition coil is confirmed as the failed part. Misfires can also come from spark plugs, wires, fuel delivery, air leaks, sensors, or engine mechanical issues.

Q: Should I compare the connector shape?
A: Yes. Connector shape, coil body, and mounting points should match the original part before installation.

Q: What else should be inspected during diagnosis?
A: Inspect spark plugs, plug wires, wiring, fuel delivery, intake leaks, sensor data, and compression if symptoms remain.

Q: What should I check before installation?
A: Work on a cool engine, inspect the connector and wiring, and confirm that the mounting points align before tightening.

Q: Is this a factory-branded vehicle manufacturer part?
A: No. BDFHYK ignition coils are OE-style aftermarket replacement parts.

Returns & Refunds

We accept returns within 30 days of delivery for eligible items. If the product is unused and in original condition, you may request a return according to our refund policy. Full policy details: View Refund Policy . We recommend contacting our support team before initiating a return to ensure the fastest resolution.

Customer Support

If you purchased the wrong part, received an incompatible item, or need installation assistance, please contact us directly.

Email: service@bdfhyk.com

Business Hours:

Mon–Fri 9:00–18:00 (GMT+8)

Mon–Fri 19:00–04:00 (UTC−6 / CST)

Manufacturing Standards

Direct Factory Supply, Cost Saving
Integrated R&D, production, and warehousing. Eliminate middleman markups: same quality at lower prices, superior quality at same prices.

Precision Inspection, Commitment to Excellence
Rigorous inspection process, international certification standards. Each product includes individual inspection.