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1998 GMC Ignitions & Electrical

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ACDelco Replacement Throttle Position Sensors

ACDelco throttle position sensors electronically inform the powertrain control module (PCM) of the throttle valve angle. The PCM uses this input to regulate your fuel and ignition systems. These replacement sensors are available in dozens of models for fitment on thousands of vehicles spanning a half-century. For the proper fit and performance, order the ACDelco throttle position sensor recommended for your application.

4.86 out of 5 stars ( 21 )

$46.99

On Sale

ACCEL C-Cut Performance Spark Plugs

ACCEL C-Cut Performance spark plugs ignite a better path to high performance for both street and strip applications. Their ground strap aligns with the centerline of the electrode to create a much-improved electrical pathway. This design reduces quenching, shrouding, and obstruction, allowing a hotter, larger flame, better firing energy, and a complete burn. Unshroud the spark to ignite your vehicle's performance; order the ACCEL C-Cut Performance spark plugs designed to fit your engine. More product features include: * Greater fuel efficiency, reduced emissions, increased performance, and better throttle response * Helps eliminate misfiring, rough idle, and overall poor performance * Copper core outperforms iridium and platinum * Machine-rolled threads protect your valuable cylinder heads * Sizes and sets available for thousands of applications

4.54 out of 5 stars ( 399 )

$24.24

$63.25


$21.82

$48.64

ACDelco GM Genuine Parts Engine Coolant Temperature Sensors

ACDelco GM Genuine Parts engine coolant sensors are a GM recommended replacement component for many vehicles on the road today. These original equipment engine coolant sensors are manufactured to fit your GM vehicle, providing you the same performance, durability, and service life you expect from General Motors.

4.68 out of 5 stars ( 72 )

$23.99

Standard Motor Distributor Caps

Is it time for a tuneup? Replace your distributor's worn-out cap with a new one from Standard Motor Products. Why take chances with old, questionable, or faulty ignition components that can leave you stranded? Standard Motor replacement distributor caps are designed to exceed OEM specifications for dependable, maintenance-free operation. Order the model designed for your specific vehicle application.

4.45 out of 5 stars ( 114 )

$22.97

On Sale

ACCEL Performance Spark Plugs

ACCEL performance spark plugs produce a larger spark for more power at high rpms. They improve throttle response and fuel economy and reduce fouling. Their purified Alumina insulator prevents arcing, and their machine-rolled threads protect heads.

4.74 out of 5 stars ( 290 )

$30.57

$47.21


$27.51

$42.49

ACDelco Replacement Turn Signal/Combination Switches

ACDelco replacement turn signal/combination switches are GM-recommended replacements for your vehicle's worn-out original component. These complex switches combine turn signal functions with other vehicle functions, all on the same lever. They are manufactured to fit your specific GM vehicle, providing the top-quality performance, durability, and service life that you expect from General Motors. When it comes to maintaining your GM vehicle, you can rely on ACDelco.

4.61 out of 5 stars ( 33 )

$43.99

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

4.64 out of 5 stars ( 95 )

$29.99

$48.99

Standard Motor T-Series OE Replacement Horns

Standard T-Series is a competitively priced line containing some of the most popular part numbers to help you meet your needs. Standard Motor T-Series OE replacement horns are built for durability and reliability. They offer the correct fit for an easier install and are available in high-tone and low-tone styles. Vehicle horns should be kept in good working order for safety of the highways. Choose the value and quality of Standard's T-Series to service your vehicle.

5.0 out of 5 stars ( 6 )

$28.99

$33.99

Delphi Ignition Coils

Delphi ignition coils will definitely spark a response! Precise spark timing offers increased fuel economy and faster crank-to-run. These coils provide accurate electrical energy to create a voltage potential at the spark plug—and that provides you with superior engine performance, better control over emissions, and fuel economy. You'll get the OE performance, durability, and electromagnetic capacity level that your vehicle requires with Delphi ignition coils. Order the model designed for your vehicle application.

4.65 out of 5 stars ( 80 )

$30.99

$47.99

Summit Racing™ High-Output Ignition Coils

Our Summit™ high-output ignition coils give you additional volts of spark energy in a simple, direct replacement package. These coils mount in the stock location with no special mounting needed, but have a lower primary resistance, higher rpm capability, and greater output than stock. They're available in a variety of styles, both universal and application-specific, and can be ordered individually or in sets.

4.5 out of 5 stars ( 377 )

$27.99

$43.99

ACDelco GM Genuine Parts Distributor Caps

ACDelco GM Genuine Parts distributor caps are a GM recommended replacement for your vehicles original component. These original equipment distributor caps have been manufactured to fit your GM vehicle, providing the same level of performance, durability, and service live you expect from General Motors.

4.63 out of 5 stars ( 35 )

$34.99

$36.99

ACDelco Vehicle Speed Sensors

ACDelco has you covered on all of your vehicle speed sensor needs. The speedometer gauge on your dashboard is getting its data from somewhere--and these are the units. The same signals are also used by multiple control modules to adjust or perform functions, such as cruise control, steering assist, and climate control. These GM-recommended replacement sensors are available for many makes and models of cars and trucks. Match your vehicle specs with the model that'll get you back up to speed!

4.5 out of 5 stars ( 4 )

$25.99

$35.99

Bosch Premium Original Equipment-Type Oxygen Sensors

Save the environment and gasoline dollars. Tune-up with Bosch premium original equipment-type oxygen sensors for lower emissions and greater fuel economy. Properly functioning oxygen sensors are important when it comes to your vehicle's fuel economy and reducing harmful exhaust emissions. That's why checking for and replacing a worn-out oxygen sensor with one of these Bosch sensors is an important part of every routine tune-up. These O2 sensors feature an OEM connector for ease of installation. Bosch invented the automotive oxygen sensor and is the top choice of carmakers around the world. Order the model designed for fitment with your vehicle.

4.75 out of 5 stars ( 178 )

$39.99

$42.99

Standard Motor Throttle Position Sensors

Standard Motor Products replacement throttle position sensors help you get maximum fuel efficiency and power from your engine. A properly operating accurate throttle position sensor is an essential component to helping your vehicle run flawlessly. The throttle position sensors transform the throttle position into output voltage and emit the voltage signal to your vehicle's computer. In addition, the sensors detect the opening and closing speed of the throttle valve and feed the voltage signal to the vehicle's computer. The computer receiving the signal from the throttle position sensor determines optimum engine operating conditions for idle control, fuel enrichment, and fuel cut. Replace your vehicle's worn or malfunctioning throttle position sensor with one of these reliable Standard Motor Products replacement TPS sensors.

3.97 out of 5 stars ( 38 )

$22.99

$46.99

ACDelco Gold Engine Coolant Temperature Sensors

ACDelco Gold engine coolant sensors are a high-quality aftermarket replacement component for many vehicles on the road today. These premium sensors are manufactured to exceed your expectations for fit and performance. Order the model recommended for your application.

4.52 out of 5 stars ( 44 )

$27.99

ACDelco Replacement Wiring Harness Connectors

When you need to make automotive repairs, ACDelco's selection of replacement wiring harness connectors offers you the best fit and function sockets and pigtails to do a variety of jobs. These quality-built, OE-like connectors and adapters provide you with efficient, less costly repair options for GM and American Motors vehicles. They're available in male or female, with an assortment of pins/cavities to fill your needs. Service your vehicle with a name you know and trust--ACDelco.

4.86 out of 5 stars ( 22 )

$21.99

$28.99

Clearance

ACDelco GM Genuine Parts Oxygen Sensors

ACDelco GM Genuine Parts oxygen (O2) sensors are special feedback sensors on your vehicle's exhaust system and are GM-recommended replacements for your vehicle's original components. They measure the proportion of oxygen in exhaust gases, then using the measurement, the engine control module (ECM) can adjust the air/fuel ratio to near the optimal value of 14.7:1. At this ratio, engine performance, emissions, and fuel economy are all optimized. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Choose the O2 sensor designed for your vehicle.

4.83 out of 5 stars ( 105 )

$49.99

Davis Unified Ignition Cap and Rotor Kits

For great firepower, you need all of the spark that you can get. and Davis Unified Ignitions cap and rotor kits from Performance Distributors will give you every jolt that you need. These quality high performance cap and rotors offer up to 50 percent higher dielectric strength and can handle all available voltage. Manufactured using the ideal resin material to handle any system, these rotors have an improved well design to eliminate burn-through, nylon rotor screws to eliminate a "ground" for the voltage to jump at high rpm, and brass terminals on the cap to give you maximum conductivity. These cap and rotor kits are available in a wide selection, including Vortec applications. Plus, many are available in several color choices. Spark your ride into action with Performance Distributors cap and rotor kits.

4.45 out of 5 stars ( 157 )

$41.75

ACDelco GM Genuine Parts Knock Sensors

ACDelco GM Genuine Parts knock sensors are the GM recommended replacement for the vehicles original component. They monitor the engine for pinging or spark knock. The sensors create a voltage signal based on the vibrations caused by erratic air/fuel mixture combustion. The engine control module then uses that signal to adjust the ignition timing and air/fuel mixture. These GM Genuine Parts knock sensors have been manufactured to fit your GM vehicle, providing you with the same performance, durability, and service life you have come to expect from General Motors.

4.67 out of 5 stars ( 109 )

$35.99

Standard Motor Turn Signal Switches

Don't take chances with old, questionable, or faulty turn signal switches that can be a danger to you and others. Standard Motor Products replacement turn signal indicator switches are designed to exceed OEM specifications for dependable, accurate, maintenance-free operation. Trust your vehicle's electrical system needs to Standard Motor Performance.

4.58 out of 5 stars ( 38 )

$47.99

Standard Motor OE Replacement Horns

Where does one go for innovative automotive repair solutions? The answer is Standard Motor Products! SMP offers quality OE replacement parts, including electric horns, which are available in either high output high-tone or low-tone applications. All horn styles provide a factory-original fit, for a professional appearance with sturdy construction--and their price won't bust the budget!

4.75 out of 5 stars ( 24 )

$32.99

$38.99

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.

4.71 out of 5 stars ( 42 )

$40.99

$42.99

ACDelco Wiring Connectors

The average vehicle today has hundreds of wiring connectors. ACDelco connectors are available for everything needed, from antennas to trailer wiring, as well as an array of multi-purpose connectors to maintain the optimal operation of your vehicle. Choose GM-recommended replacement wiring connectors to ensure the same performance, durability, and service life you've come to expect from General Motors products.

4.95 out of 5 stars ( 37 )

$21.99

$35.99

Body Parts Battery Trays

Keep your battery in place with Body Parts battery trays. These platters serve your battery with strong steel, an EDP coating, and an OE fit. Replace the old, corroded tray with new parts--Body Parts battery trays.

3.57 out of 5 stars ( 7 )

$42.99