More Power in Every Purchase - Join the Summit Rewards Program Today!

More Power in Every Purchase - Join the Summit Rewards Program Today!

Stay Cool With SUMMER SALE Savings!

MERCURY GRAND MARQUIS Parts and Accessories

Part Groups

Results 1 - 24 of 80

Summit Bucks

ACDelco Air Conditioning Compressors

ACDelco air conditioning compressors are an ideal choice for a custom hot rod project or standard OEM replacement. They're available in new or cost-alternative remanufactured units for fitment on a wide range of applications. The heart of any air conditioning system is the compressor—their primary function is to compress and transfer refrigerant gas. The intake side draws in refrigerant gas from the outlet of the evaporator. Once condensed to a gas, it's then discharged to the condenser, where it can transfer the heat that is absorbed from the inside of the vehicle.

4.11 out of 5 stars ( 84 )

$231.99

Summit Bucks

Mickey Thompson Sportsman S/T Radial Tires

Mickey Thompson Sportsman S/T radial tires are designed for musclecar owners who demand performance, quality, and style. These M&S-rated all-season performance tires will give your musclecar a wide, low-profile look, along with the great performance, handling, and wear that your car deserves.

4.75 out of 5 stars ( 360 )

$168.89

$181.99

ACDelco Conventional Resistor Spark Plugs

ACDelco conventional resistor spark plugs feature a design for reliability and efficient performance. These economical replacements remain ideal for many vehicles and marine applications. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance every time. The spark plugs are available in a variety of sizes and other options for universal and application-specific fitment. Order the model recommended for your vehicle.

4.82 out of 5 stars ( 257 )

$1.99

$2.99

Summit Bucks

Denso Ignition Coils

Denso developed the auto industry's first compact stick-type ignition coil. The space-saving design of Denso ignition coils requires no high-tension ignition cables, fitting neatly into the engine's spark plug bore. Along with its stick coil technology, other advanced features include micro-sized driver circuits and diagonal inductive windings. That same expertise is put to use on all Denso ignition coils regardless of their configuration. Each Denso ignition coil is designed and optimized for its specific application, then continually improved by Denso's global engineering team. One key to effective combustion in today's low-emission, high-efficiency engines is consistent, high-energy ignition output. Denso direct ignition coils deliver it. Additional features and benefits of Denso ignition coils include: * Integrated driving circuit in the top of the coil * Superior-quality components and materials ensure optimal performance * Tested and inspected to ensure high quality * Diagonal windings eliminate sectioned bobbins, reducing size and weight * Improved coil efficiency lessens the need to generate high voltage * Eliminates phantom misfires * Small in size, light in weight, and easy to install * Provides maximum available voltage under all operating conditions

4.91 out of 5 stars ( 93 )

$26.99

$70.99

Summit Bucks

ACDelco Gold Platinum Spark Plugs

ACDelco Gold platinum spark plugs are perfect for engines that run on conventional plugs, as well as newer engines that require platinum plugs. These spark plugs can provide up to 100,000 miles of service before needing replacement (service life varies with individual driving conditions.) Features: * Dual platinum tip for improved resistance to spark erosion, fouling, and corrosive combustion chamber environment * Ribless insulator that improves the plug-to-boot seal * Platinum center electrode and platinum pad that lower the ignition demand voltage and reduce possible flame kernel quenching * One-piece integral suppressor seal that helps reduce radio frequency interference, meters spark plug energy to help provide long electrode life, and seals against compression leakage * Maximum engine performance over time * Corrosion-resistant shell to keep up with the demands of any vehicle * Spark gap remains virtually unchanged during the life of the plug * Meets increased auto industry performance and reliability requirements * Available for most makes and models * 100,000-mile (160,000-kilometer) limited warranty

4.87 out of 5 stars ( 98 )

$6.99

$7.99

Summit Bucks

Denso Oxygen Sensors

Oxygen sensors, also known as Lambda sensors or O2 sensors, are among the most sensitive and critical components on your car's engine. They monitor the air/fuel mixture under idle, moderate acceleration, and cruise conditions. Oxygen sensors have a smaller range of limits in detecting and adjusting the difference from an optimum air/fuel ratio than the newer wide range air/fuel sensors (A/F sensors). Today's engines may use as many as four oxygen sensors to monitor exhaust gas oxygen content and catalytic converter efficiency. In order to perform these functions properly, Denso oxygen sensors adhere to strict OE standards within incredibly close tolerances. A malfunctioning or incorrectly calibrated oxygen sensor can hurt drivability and illuminate the check engine light, resulting in costly and time-consuming repairs. Denso First Time Fit oxygen sensors are designed to meet those tolerances and more. Key features and benefits of Denso Oxygen Sensors include: * Robotic laser welds * Porous PTFE filters block efficiency-robbing contaminants * Double-protection covers maintain proper temperature for quicker response times and protect ceramic elements from silicone and lead fouling * Rugged, watertight stainless steel housings resist corrosion and contamination * Aluminum oxide trap layers keep silicone and lead out, preventing damage to the platinum electrode * Refined zirconia elements improves sensor response * Superior design maximizes engine performance while reducing fuel consumption and harmful emissions * First Time Fit design delivers the right part the first time

4.61 out of 5 stars ( 101 )

$28.99

$53.99

Summit Bucks

ACDelco Starters

When you turn the key and your vehicle is slow to turn over—or worse, there's no ignition at all—one of the prime suspects is a faulty starter. Getting the engine up and running for each drive begins with this unit, so it's wise to trust your replacement parts to ACDelco. The aftermarket parts giant manufactures starters to precise OE specifications for perfect fit and performance on virtually any vehicle on the road today. Don't wait until a weak, aging starter fails completely; install an ACDelco product …and turn the key with confidence!

4.41 out of 5 stars ( 190 )

$75.99

$91.99

Summit Bucks

ACDelco GM Genuine Parts Shocks and Struts

ACDelco GM Genuine Parts shocks and struts can help support your ride like no other. GM Genuine Parts are the true OE parts installed during production or validated by GM, for GM vehicles--designed, engineered, and tested to rigorous standards and backed by General Motors.

4.8 out of 5 stars ( 111 )

$40.99

Summit Bucks

Denso Iridium TT Spark Plugs

Denso Iridium TT spark plugs, with their unique Twin-Tip technology, have two "tips": a 0.4mm iridium center electrode, and a 0.7mm platinum ground electrode. First used with OE spark plugs for luxury and performance cars, they are the smallest mass-produced center electrodes available. They require lower voltage and feature high-ignitability, so there is less interference with spark growth (quenching) and the twin tips deliver omnidirectional ignition, unlike the flat "sandwich" ignition of other spark plugs. Denso selected iridium and engineered it with rhodium to build the most durable alloy for spark plugs. Their patented formula has the highest concentration of iridium of any spark plug and even under the most severe engine temperatures resists oxidation and voltage wear for extended periods. The superior ignition of Denso Iridium TT spark plugs means more efficiency, fewer misfires, and significantly improved combustion, optimizing power and fuel economy like never before. Order the model designed for your vehicle application. Additional features of Denso Iridium TT spark plugs include: * Revolutionary 0.4mm center electrode means significantly improved combustion and reduced misfires * Invented by Denso, Iridium TT Twin-Tip technology creates a larger flame front for more complete combustion * Precision 360 degree laser-welding technology ensures structural support for the iridium center electrode, even in the harshest combustion environments * Tested to last well beyond 100,000 miles, with minimal loss of performance, for greater lifetime savings than any plugs available today

4.56 out of 5 stars ( 16 )

$7.99

$8.99

Summit Bucks

ACDelco Gold Synthetic Engine Oil

With a range of viscosities and oil types, ACDelco Gold synthetic engine oil is a smart choice for General Motors vehicles and offers consistent performance suited for most makes and models of vehicles, including special applications. Backed by GM, ACDelco Gold oil provides engine lubrication and protects against high-temperature deposits, minimizing wear and friction. It meets ILSAC GF-6 specifications, a performance standard designed to improve fuel economy and enhance engine capabilities for passenger cars, to fulfill current energy-conserving performance standards. Choose the recommended grade of oil for your vehicle as found within your owner's manual.

5.0 out of 5 stars ( 1 )

$6.99

$8.99

Summit Bucks

ACDelco Gold Suspension Stabilizer Bar Link Kits

ACDelco Gold suspension stabilizer bar link kits come with everything you need for easy installation. The direct-fit replacements are available in a wide range of styles for specific applications. They are premium aftermarket replacement kits that meet the performance standards you would expect from ACDelco. Order the kit designed for your vehicle.

4.38 out of 5 stars ( 21 )

$10.99

$18.99

Summit Bucks

ACDelco Gold Battery Cables

ACDelco Gold battery cables are premium copper electric replacements with cast lead terminal connections at the battery ends. They feature a durable insulation that helps resist the harsh underhood environments. Hundreds of models and options are available for vehicles from the 1940s and up.

4.74 out of 5 stars ( 39 )

$15.99

$17.99

Summit Bucks

ACDelco Gold Cooling Fan Clutches

ACDelco Gold cooling fan clutches are high-quality aftermarket replacements for your worn-out original. Fan clutches control the speed of the radiator fan, based on the temperature of the air as it passes through the radiator fins. They're manufactured to meet or exceed your expectations for fit, form and function. Order the model recommended for your vehicle.

4.38 out of 5 stars ( 21 )

$48.99

Summit Bucks

ACDelco GM Genuine Parts Remanufactured Alternators

ACDelco GM Genuine Parts remanufactured alternators provide a great value while getting 100 percent performance-tested to provide the fit, form, and function your GM vehicle requires. Damaged and obsolete parts are replaced, and the units receive 100 percent new bearings, bushings, and brushes for the ultimate in reliability. Say goodbye to lost power when you order the ACDelco GM Genuine Parts remanufactured alternator designed for your vehicle application!

4.5 out of 5 stars ( 46 )

$40.99

Summit Bucks

ACDelco Light Bulb Sockets

ACDelco light bulb sockets are replacement lamp bulb holders for your vehicle's interior and exterior lighting. The bulb sockets securely hold the bulb and provide the electrical connection to operate the bulb. These original equipment light bulb sockets have been manufactured to fit specific GM vehicle factory light assemblies. They're available for more than a hundred lighting connections on most vehicles. Order the model designed for your application.

4.24 out of 5 stars ( 21 )

$3.99

$4.99

Summit Bucks

ACDelco Gold Premium Shocks and Struts

ACDelco Gold premium shocks are twin-tube passive replacements for your passenger car, van, SUV, or light truck. Each of these shocks features a high-pressure nitrogen gas charge, along with chrome-finished piston rods and drawn-over-mandrel (DOM) pressure cylinders. Adding further ride support, ACDelco Gold shocks utilize their premium RoadResponse valving technology that automatically adjusts to changing road conditions during normal driving situations—and offers optimum handling under various road conditions. Great comfort, control, and durability will be experienced with ACDelco Gold premium shocks on your vehicle. Order the lengths recommended for your application.

4.88 out of 5 stars ( 8 )

$43.99

Summit Bucks

ACDelco Gold Voltage Regulators

ACDelco Gold voltage regulators are available in nearly 200 models to service vehicles from 1930 and up. These units monitor the proper voltage to critical systems. For example, the starting and charging system starts the engine, maintains the batteries charge, and provides power to the electrical accessories while the engine is running. Order the replacement regulator designed for your application.

3.56 out of 5 stars ( 25 )

$27.99

Summit Bucks

ACDelco RAPIDFIRE Performance Platinum Spark Plugs

ACDelco RAPIDFIRE platinum spark plugs fit engines that require conventional or platinum plugs—offering quicker throttle response, smoother idle, better corrosion protection, and greater longevity when compared to conventional plugs. RAPIDFIRE platinum spark plugs are available for most vehicle makes and models and several marine applications. Product features: * Ribless insulator that improves the plug-to-boot seal * Tapered and columned center wire electrode with a platinum pad that reduces the firing diameter—and helps improve the firing efficiency by concentrating and directing energy needed to fire the plug with less voltage * A platinum center electrode and platinum pad lower the ignition demand voltage and reduce possible flame kernel quenching * One-piece integral suppressor seal helps reduce radio frequency interference, meters spark plug energy to prolong electrode life, and seals against compression leakage * An expected life of 50,000 miles or better * Gapped to the engine's original factory specifications * 30-day, money-back guarantee and 3-year limited warranty

4.64 out of 5 stars ( 116 )

$4.99

Summit Bucks

Denso Platinum TT Spark Plugs

Denso Platinum TT spark plugs originated from Denso's Twin-Tip design for original equipment use in the most technologically advanced automobiles. But now Denso offers this cutting-edge technology in a platinum/titanium design customized for today's value-minded automotive enthusiasts. Denso pioneered the use of platinum in spark plug manufacturing. To maximize longevity and enhance durability, Denso applied platinum to both the center and ground electrodes. Platinum offers superior resistance to erosion and corrosion enabling Denso to create spark plugs capable of consistent performance. Additional features and benefits of Denso Platinum TT spark plugs include: * 360 degree laser weld * 1.1mm platinum center electrode * Titanium-enhanced alloy ground electrode * Minimum-quench electrode design * Free standing firing pad * Improved fuel economy * Faster starts * Enhanced flame propagation for increased engine efficiency * Reduced quenching generates a more powerful spark

5.0 out of 5 stars ( 2 )

$4.99

Summit Bucks

Denso Electric Fuel Pumps

Denso's proprietary turbine pump technology delivers the highest sustained fuel pressures in the industry, and is why Denso electric fuel pumps are chosen as standard equipment by the world's most demanding OEMs, especially for their premium vehicles. Denso's open-vane impellers are more efficient than competitors' closed-vane impellers. Their ultra-efficient design requires low-amperage to ensure optimum flow rates are maintained over time. Denso carefully balances the armatures at 3,000 rpm, then they are spun again at 8,000 rpm to minimize noise and vibration. Many competitors do not balance their armatures at all. Additional features of Denso electric fuel pumps include: * Turbine technology delivers fuel with minimal pressure pulsation for quieter operation * Check valve maintains consistent system pressure for superior hot fuel handling * Relief valve protects the fuel delivery system * Choke coils minimize radio interference * Brushes designed for durability, efficiency, and low-resistance operation

4.6 out of 5 stars ( 5 )

$77.99

$101.99

Summit Bucks

Denso Air Conditioning Compressors

Denso air conditioning compressors are all-new units built to meet Denso's unsurpassed reputation for technological superiority. As one of the world's largest OE suppliers of A/C compressors, Denso units are specified by most major vehicle manufacturers. They're manufactured and tested to the strictest OE standards for unparalleled performance. Denso brings together everything they know as an air conditioning systems manufacturer to deliver the highest quality line of factory-new compressors available. When it comes to new compressors, you can't do better than going with a unit manufactured by the OE supplier. Denso knows these units better than anyone because they originally designed them. Hundreds of models are available—for applications from the 1980s and up. Order the model recommended for your vehicle. Additional features of Denso air conditioning compressors include: * Denso First Time Fit provides the right part and the right fit ... the first time, every time * Snap rings improve performance under extreme heat * Thrust bearings built to withstand tension and stress for maximum durability * Valves and shafts designed with lightweight aluminum alloy for added strength * OE-specified O-rings and seals compatible with both R12 and R134a refrigerants * Factory O-ring installation kits prevent leakage and ensure proper installation * PTFE surface-treated pistons for smooth, efficient operation * Lightweight aluminum alloy swash plates for added strength * Includes the proper OE specified oil

4.32 out of 5 stars ( 31 )

$198.99

Summit Bucks

ACDelco Crankshaft Front Seals

ACDelco designs their high-quality crankshaft front seals to fit various radial shafts and seal in engine oil while keeping dirt and water out. Featuring synthetic rubber or plastic composite materials, these engine seals conform to the rotating crankshaft sealing surface to help provide leak-free operation. The OE-style replacements provide the same fit and performance you expect from all General Motors parts. They're available in models for virtually any vehicle on the road today.

3.05 out of 5 stars ( 20 )

$4.99

$8.99

Summit Bucks

ACDelco Gold Oil Filters

An engine running on dirty oil won't last. Keep it clean with an ACDelco Gold oil filter. They help trap particles up to 25 microns, or one-third the width of a human hair, thereby improving the quality, performance, and lifespan of your engine. ACDelco makes oil filters to fit 99 percent of all cars, light trucks, and sport utility vehicles on the road today. Order the model designed for your engine application. Additional features include: * Excellent filter capacity, enhanced efficiency, consistent flow management, and high durability * Tight seals to prevent unfiltered oil from entering your engine * Consistent, dependable oil filtration throughout the filters

4.57 out of 5 stars ( 166 )

$7.99

Summit Bucks

ACDelco Heater Valves

ACDelco heater valves control the flow of coolant through the heater core. These valves close to stop coolant from flowing through the heater core, permitting maximum cooling from the A/C evaporator. ACDelco aftermarket replacement HVAC heater control valves are manufactured to meet or exceed your expectations for quality and function.

4.8 out of 5 stars ( 5 )

$12.99

Modal Header