Control Modules for 1996 GMC Sonoma
- Aero Ground Effects & Body Kits
- Back Panel
- Box Assembly
- Brackets, Flanges & Hangers
- Bumper
- Bumper & Components - Front
- Bumper & Components - Rear
- Bushings
- Cab Assembly
- Cargo Door
- Carrier & Components
- Center Console
- Cluster & Switches
- Console
- Control Cables
- Cowl
- Crossmembers & Components
- Dashboard
- Door & Components
- Doors
- Ducts
- Exterior Trim - Cab
- Exterior Trim - Fender
- Exterior Trim - Front Door
- Exterior Trim - Pick UP Box
- Exterior Trim - Rear Door
- Fender & Components
- Fenders
- Floor
- Floor - Cab
- Floor - Pick UP Box
- Frame
- Frame & Components
- Front & Side Panels
- Front Console
- Front Door
- Front Seat Components
- Gaskets & Sealing Systems
- Glass - Front Door
- Glass - Rear Door
- Glass - Windshield
- Glass & Hardware - Back
- Glass, Windows & Related Components
- Glove Box
- Grille
- Grille & Components
- Hardware, Fasteners & Fittings
- Hood
- Hood & Components
- Horns
- Information Labels
- Instrument Panel
- Instrument Panel Components
- Interior Trim - Cab
- Interior Trim - Front Door
- Interior Trim - Rear Door
- Labels
- Lock & Hardware
- Mirrors
- Outside Mirrors
- Quarter Panel
- Radiator Support
- Rear Body
- Rear Door
- Rear Seat Components
- Reveal Moldings
- Roof
- Roof & Components
- Roof Lamps
- Seat Belt
- Seats
- Side Body
- Side Glass
- Side Panel & Components
- Side Pillar
- Sound System
- Steering Wheel
- Stripe Tape
- Tail Gate
- Tailgate
- Tailgate & Midgate
- Tracks & Components
- Truck Box
- Truck Cab
- Uniside
- Wiper & Washer Components
- ABS Components
- Anti-Lock Brakes
- Brake Components
- Brake Hydraulics
- Bushings
- Control Modules
- Disc Pads & Brake Shoes
- Drums & Rotors
- Front Brakes
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Hoses & Pipes
- Hydraulic System
- Lighting - Instrumentation
- Parking Brake
- Rear Brakes
- Sensors
- Service Kits
- Valves
- Wire, Cable & Related Components
- ABS Components
- Air Bag Components
- Air Bag System
- Alternator
- Alternator/Generator & Related Components
- Antenna & Radio
- Anti-Theft System
- Battery
- Battery & Related Components
- Battery Cables
- Brackets, Flanges & Hangers
- Bulbs - Chassis
- Combination Tail Lamps
- Control Modules
- Cruise Control System
- Daytime Running Lamp Components
- Daytime Running Lamps
- Door
- Electrical Connectors
- Electrical Sockets
- Flasher Units, Fuses, & Circuit Breakers
- Flashers
- Fog Lamps
- Front Door
- Front Seat Belts
- Glass, Windows & Related Components
- Hardware, Fasteners & Fittings
- Headlamp Components
- High Mount Lamps
- Horn
- Ignition Lock
- Ignition System
- Information Labels
- Instruments & Gauges
- Keyless Entry Components
- License Lamps
- Lighting - Exterior
- Lighting - Instrumentation
- Lighting - Interior
- Lumbar Control Seats
- Mobile Multi-Media
- Park & Signal Lamps
- Power Outlets
- Power Seats
- Powertrain Control
- Rear Door
- Rear Seat Belts
- Relays
- Senders
- Sensors
- Side Marker Lamps
- Starter
- Starter & Related Components
- Steering Column
- Steering Wheel
- Switches
- Switches, Solenoids & Actuators
- Tailgate
- Window Defroster
- Wipers
- Wire, Cable & Related Components
- A/C Accumulator/Receiver Drier
- A/C Clutch & Compressor
- A/C Condenser & Evaporator
- A/C Flow Restrictors
- Blower Motor & Fan
- Brackets, Flanges & Hangers
- Condenser, Compressor & Lines
- Controls
- Evaporator Components
- Filters
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Heater
- Heater Components
- Hoses & Pipes
- HVAC Case
- Motors, Core, Case & Related Components
- Switches & Sensors
- Switches, Solenoids & Actuators
- Temperature Controls & Related Components
- Bearings
- Brackets, Flanges & Hangers
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Housing & Components
- Lower Components
- P/S Pump & Hoses
- Power Steering Hoses, Pumps, & Related Components
- Pump & Hoses
- Shroud, Switches & Levers
- Steering Column
- Steering Column Assembly
- Steering Gear & Linkage
- Steering Wheel
- Steering Wheel & Trim
- Steering, Gear & Related Components
- Axle Housing
- Axle Shaft
- Brackets, Flanges & Hangers
- Bushings
- Carrier & Front Axles
- Covers & Trim
- Front Suspension
- Hardware, Fasteners & Fittings
- Rear Suspension
- Shocks & Struts
- Stabilizer Bar & Components
- Suspension Components
- Suspension, Springs & Related Components
- Torsion Bar
- Upper Control Arm
- Wheels
- Automatic Transmission Components
- Bearings
- Brackets, Flanges & Hangers
- Clutch Plates
- Filters
- Flywheel
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Lighting - Instrumentation
- Manual Transmission Components
- Sensors
- Switches, Solenoids & Actuators
- Transmission Components
- Transmission Hard Parts
- Aero Ground Effects & Body Kits
- Back Panel
- Box Assembly
- Brackets, Flanges & Hangers
- Bumper
- Bumper & Components - Front
- Bumper & Components - Rear
- Bushings
- Cab Assembly
- Cargo Door
- Carrier & Components
- Center Console
- Cluster & Switches
- Console
- Control Cables
- Cowl
- Crossmembers & Components
- Dashboard
- Door & Components
- Doors
- Ducts
- Exterior Trim - Cab
- Exterior Trim - Fender
- Exterior Trim - Front Door
- Exterior Trim - Pick UP Box
- Exterior Trim - Rear Door
- Fender & Components
- Fenders
- Floor
- Floor - Cab
- Floor - Pick UP Box
- Frame
- Frame & Components
- Front & Side Panels
- Front Console
- Front Door
- Front Seat Components
- Gaskets & Sealing Systems
- Glass - Front Door
- Glass - Rear Door
- Glass - Windshield
- Glass & Hardware - Back
- Glass, Windows & Related Components
- Glove Box
- Grille
- Grille & Components
- Hardware, Fasteners & Fittings
- Hood
- Hood & Components
- Horns
- Information Labels
- Instrument Panel
- Instrument Panel Components
- Interior Trim - Cab
- Interior Trim - Front Door
- Interior Trim - Rear Door
- Labels
- Lock & Hardware
- Mirrors
- Outside Mirrors
- Quarter Panel
- Radiator Support
- Rear Body
- Rear Door
- Rear Seat Components
- Reveal Moldings
- Roof
- Roof & Components
- Roof Lamps
- Seat Belt
- Seats
- Side Body
- Side Glass
- Side Panel & Components
- Side Pillar
- Sound System
- Steering Wheel
- Stripe Tape
- Tail Gate
- Tailgate
- Tailgate & Midgate
- Tracks & Components
- Truck Box
- Truck Cab
- Uniside
- Wiper & Washer Components
- ABS Components
- Anti-Lock Brakes
- Brake Components
- Brake Hydraulics
- Bushings
- Control Modules
- Disc Pads & Brake Shoes
- Drums & Rotors
- Front Brakes
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Hoses & Pipes
- Hydraulic System
- Lighting - Instrumentation
- Parking Brake
- Rear Brakes
- Sensors
- Service Kits
- Valves
- Wire, Cable & Related Components
- ABS Components
- Air Bag Components
- Air Bag System
- Alternator
- Alternator/Generator & Related Components
- Antenna & Radio
- Anti-Theft System
- Battery
- Battery & Related Components
- Battery Cables
- Brackets, Flanges & Hangers
- Bulbs - Chassis
- Combination Tail Lamps
- Control Modules
- Cruise Control System
- Daytime Running Lamp Components
- Daytime Running Lamps
- Door
- Electrical Connectors
- Electrical Sockets
- Flasher Units, Fuses, & Circuit Breakers
- Flashers
- Fog Lamps
- Front Door
- Front Seat Belts
- Glass, Windows & Related Components
- Hardware, Fasteners & Fittings
- Headlamp Components
- High Mount Lamps
- Horn
- Ignition Lock
- Ignition System
- Information Labels
- Instruments & Gauges
- Keyless Entry Components
- License Lamps
- Lighting - Exterior
- Lighting - Instrumentation
- Lighting - Interior
- Lumbar Control Seats
- Mobile Multi-Media
- Park & Signal Lamps
- Power Outlets
- Power Seats
- Powertrain Control
- Rear Door
- Rear Seat Belts
- Relays
- Senders
- Sensors
- Side Marker Lamps
- Starter
- Starter & Related Components
- Steering Column
- Steering Wheel
- Switches
- Switches, Solenoids & Actuators
- Tailgate
- Window Defroster
- Wipers
- Wire, Cable & Related Components
- A/C Accumulator/Receiver Drier
- A/C Clutch & Compressor
- A/C Condenser & Evaporator
- A/C Flow Restrictors
- Blower Motor & Fan
- Brackets, Flanges & Hangers
- Condenser, Compressor & Lines
- Controls
- Evaporator Components
- Filters
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Heater
- Heater Components
- Hoses & Pipes
- HVAC Case
- Motors, Core, Case & Related Components
- Switches & Sensors
- Switches, Solenoids & Actuators
- Temperature Controls & Related Components
- Bearings
- Brackets, Flanges & Hangers
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Housing & Components
- Lower Components
- P/S Pump & Hoses
- Power Steering Hoses, Pumps, & Related Components
- Pump & Hoses
- Shroud, Switches & Levers
- Steering Column
- Steering Column Assembly
- Steering Gear & Linkage
- Steering Wheel
- Steering Wheel & Trim
- Steering, Gear & Related Components
- Axle Housing
- Axle Shaft
- Brackets, Flanges & Hangers
- Bushings
- Carrier & Front Axles
- Covers & Trim
- Front Suspension
- Hardware, Fasteners & Fittings
- Rear Suspension
- Shocks & Struts
- Stabilizer Bar & Components
- Suspension Components
- Suspension, Springs & Related Components
- Torsion Bar
- Upper Control Arm
- Wheels
- Automatic Transmission Components
- Bearings
- Brackets, Flanges & Hangers
- Clutch Plates
- Filters
- Flywheel
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Lighting - Instrumentation
- Manual Transmission Components
- Sensors
- Switches, Solenoids & Actuators
- Transmission Components
- Transmission Hard Parts
Browse Categories
Select category
- Aero Ground Effects & Body Kits
- Back Panel
- Box Assembly
- Brackets, Flanges & Hangers
- Bumper
- Bumper & Components - Front
- Bumper & Components - Rear
- Bushings
- Cab Assembly
- Cargo Door
- Carrier & Components
- Center Console
- Cluster & Switches
- Console
- Control Cables
- Cowl
- Crossmembers & Components
- Dashboard
- Door & Components
- Doors
- Ducts
- Exterior Trim - Cab
- Exterior Trim - Fender
- Exterior Trim - Front Door
- Exterior Trim - Pick UP Box
- Exterior Trim - Rear Door
- Fender & Components
- Fenders
- Floor
- Floor - Cab
- Floor - Pick UP Box
- Frame
- Frame & Components
- Front & Side Panels
- Front Console
- Front Door
- Front Seat Components
- Gaskets & Sealing Systems
- Glass - Front Door
- Glass - Rear Door
- Glass - Windshield
- Glass & Hardware - Back
- Glass, Windows & Related Components
- Glove Box
- Grille
- Grille & Components
- Hardware, Fasteners & Fittings
- Hood
- Hood & Components
- Horns
- Information Labels
- Instrument Panel
- Instrument Panel Components
- Interior Trim - Cab
- Interior Trim - Front Door
- Interior Trim - Rear Door
- Labels
- Lock & Hardware
- Mirrors
- Outside Mirrors
- Quarter Panel
- Radiator Support
- Rear Body
- Rear Door
- Rear Seat Components
- Reveal Moldings
- Roof
- Roof & Components
- Roof Lamps
- Seat Belt
- Seats
- Side Body
- Side Glass
- Side Panel & Components
- Side Pillar
- Sound System
- Steering Wheel
- Stripe Tape
- Tail Gate
- Tailgate
- Tailgate & Midgate
- Tracks & Components
- Truck Box
- Truck Cab
- Uniside
- Wiper & Washer Components
- ABS Components
- Anti-Lock Brakes
- Brake Components
- Brake Hydraulics
- Bushings
- Control Modules
- Disc Pads & Brake Shoes
- Drums & Rotors
- Front Brakes
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Hoses & Pipes
- Hydraulic System
- Lighting - Instrumentation
- Parking Brake
- Rear Brakes
- Sensors
- Service Kits
- Valves
- Wire, Cable & Related Components
- ABS Components
- Air Bag Components
- Air Bag System
- Alternator
- Alternator/Generator & Related Components
- Antenna & Radio
- Anti-Theft System
- Battery
- Battery & Related Components
- Battery Cables
- Brackets, Flanges & Hangers
- Bulbs - Chassis
- Combination Tail Lamps
- Control Modules
- Cruise Control System
- Daytime Running Lamp Components
- Daytime Running Lamps
- Door
- Electrical Connectors
- Electrical Sockets
- Flasher Units, Fuses, & Circuit Breakers
- Flashers
- Fog Lamps
- Front Door
- Front Seat Belts
- Glass, Windows & Related Components
- Hardware, Fasteners & Fittings
- Headlamp Components
- High Mount Lamps
- Horn
- Ignition Lock
- Ignition System
- Information Labels
- Instruments & Gauges
- Keyless Entry Components
- License Lamps
- Lighting - Exterior
- Lighting - Instrumentation
- Lighting - Interior
- Lumbar Control Seats
- Mobile Multi-Media
- Park & Signal Lamps
- Power Outlets
- Power Seats
- Powertrain Control
- Rear Door
- Rear Seat Belts
- Relays
- Senders
- Sensors
- Side Marker Lamps
- Starter
- Starter & Related Components
- Steering Column
- Steering Wheel
- Switches
- Switches, Solenoids & Actuators
- Tailgate
- Window Defroster
- Wipers
- Wire, Cable & Related Components
- A/C Accumulator/Receiver Drier
- A/C Clutch & Compressor
- A/C Condenser & Evaporator
- A/C Flow Restrictors
- Blower Motor & Fan
- Brackets, Flanges & Hangers
- Condenser, Compressor & Lines
- Controls
- Evaporator Components
- Filters
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Heater
- Heater Components
- Hoses & Pipes
- HVAC Case
- Motors, Core, Case & Related Components
- Switches & Sensors
- Switches, Solenoids & Actuators
- Temperature Controls & Related Components
- Bearings
- Brackets, Flanges & Hangers
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Housing & Components
- Lower Components
- P/S Pump & Hoses
- Power Steering Hoses, Pumps, & Related Components
- Pump & Hoses
- Shroud, Switches & Levers
- Steering Column
- Steering Column Assembly
- Steering Gear & Linkage
- Steering Wheel
- Steering Wheel & Trim
- Steering, Gear & Related Components
- Axle Housing
- Axle Shaft
- Brackets, Flanges & Hangers
- Bushings
- Carrier & Front Axles
- Covers & Trim
- Front Suspension
- Hardware, Fasteners & Fittings
- Rear Suspension
- Shocks & Struts
- Stabilizer Bar & Components
- Suspension Components
- Suspension, Springs & Related Components
- Torsion Bar
- Upper Control Arm
- Wheels
- Automatic Transmission Components
- Bearings
- Brackets, Flanges & Hangers
- Clutch Plates
- Filters
- Flywheel
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Lighting - Instrumentation
- Manual Transmission Components
- Sensors
- Switches, Solenoids & Actuators
- Transmission Components
- Transmission Hard Parts
- Aero Ground Effects & Body Kits
- Back Panel
- Box Assembly
- Brackets, Flanges & Hangers
- Bumper
- Bumper & Components - Front
- Bumper & Components - Rear
- Bushings
- Cab Assembly
- Cargo Door
- Carrier & Components
- Center Console
- Cluster & Switches
- Console
- Control Cables
- Cowl
- Crossmembers & Components
- Dashboard
- Door & Components
- Doors
- Ducts
- Exterior Trim - Cab
- Exterior Trim - Fender
- Exterior Trim - Front Door
- Exterior Trim - Pick UP Box
- Exterior Trim - Rear Door
- Fender & Components
- Fenders
- Floor
- Floor - Cab
- Floor - Pick UP Box
- Frame
- Frame & Components
- Front & Side Panels
- Front Console
- Front Door
- Front Seat Components
- Gaskets & Sealing Systems
- Glass - Front Door
- Glass - Rear Door
- Glass - Windshield
- Glass & Hardware - Back
- Glass, Windows & Related Components
- Glove Box
- Grille
- Grille & Components
- Hardware, Fasteners & Fittings
- Hood
- Hood & Components
- Horns
- Information Labels
- Instrument Panel
- Instrument Panel Components
- Interior Trim - Cab
- Interior Trim - Front Door
- Interior Trim - Rear Door
- Labels
- Lock & Hardware
- Mirrors
- Outside Mirrors
- Quarter Panel
- Radiator Support
- Rear Body
- Rear Door
- Rear Seat Components
- Reveal Moldings
- Roof
- Roof & Components
- Roof Lamps
- Seat Belt
- Seats
- Side Body
- Side Glass
- Side Panel & Components
- Side Pillar
- Sound System
- Steering Wheel
- Stripe Tape
- Tail Gate
- Tailgate
- Tailgate & Midgate
- Tracks & Components
- Truck Box
- Truck Cab
- Uniside
- Wiper & Washer Components
- ABS Components
- Anti-Lock Brakes
- Brake Components
- Brake Hydraulics
- Bushings
- Control Modules
- Disc Pads & Brake Shoes
- Drums & Rotors
- Front Brakes
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Hoses & Pipes
- Hydraulic System
- Lighting - Instrumentation
- Parking Brake
- Rear Brakes
- Sensors
- Service Kits
- Valves
- Wire, Cable & Related Components
- ABS Components
- Air Bag Components
- Air Bag System
- Alternator
- Alternator/Generator & Related Components
- Antenna & Radio
- Anti-Theft System
- Battery
- Battery & Related Components
- Battery Cables
- Brackets, Flanges & Hangers
- Bulbs - Chassis
- Combination Tail Lamps
- Control Modules
- Cruise Control System
- Daytime Running Lamp Components
- Daytime Running Lamps
- Door
- Electrical Connectors
- Electrical Sockets
- Flasher Units, Fuses, & Circuit Breakers
- Flashers
- Fog Lamps
- Front Door
- Front Seat Belts
- Glass, Windows & Related Components
- Hardware, Fasteners & Fittings
- Headlamp Components
- High Mount Lamps
- Horn
- Ignition Lock
- Ignition System
- Information Labels
- Instruments & Gauges
- Keyless Entry Components
- License Lamps
- Lighting - Exterior
- Lighting - Instrumentation
- Lighting - Interior
- Lumbar Control Seats
- Mobile Multi-Media
- Park & Signal Lamps
- Power Outlets
- Power Seats
- Powertrain Control
- Rear Door
- Rear Seat Belts
- Relays
- Senders
- Sensors
- Side Marker Lamps
- Starter
- Starter & Related Components
- Steering Column
- Steering Wheel
- Switches
- Switches, Solenoids & Actuators
- Tailgate
- Window Defroster
- Wipers
- Wire, Cable & Related Components
- A/C Accumulator/Receiver Drier
- A/C Clutch & Compressor
- A/C Condenser & Evaporator
- A/C Flow Restrictors
- Blower Motor & Fan
- Brackets, Flanges & Hangers
- Condenser, Compressor & Lines
- Controls
- Evaporator Components
- Filters
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Heater
- Heater Components
- Hoses & Pipes
- HVAC Case
- Motors, Core, Case & Related Components
- Switches & Sensors
- Switches, Solenoids & Actuators
- Temperature Controls & Related Components
- Bearings
- Brackets, Flanges & Hangers
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Housing & Components
- Lower Components
- P/S Pump & Hoses
- Power Steering Hoses, Pumps, & Related Components
- Pump & Hoses
- Shroud, Switches & Levers
- Steering Column
- Steering Column Assembly
- Steering Gear & Linkage
- Steering Wheel
- Steering Wheel & Trim
- Steering, Gear & Related Components
- Axle Housing
- Axle Shaft
- Brackets, Flanges & Hangers
- Bushings
- Carrier & Front Axles
- Covers & Trim
- Front Suspension
- Hardware, Fasteners & Fittings
- Rear Suspension
- Shocks & Struts
- Stabilizer Bar & Components
- Suspension Components
- Suspension, Springs & Related Components
- Torsion Bar
- Upper Control Arm
- Wheels
- Automatic Transmission Components
- Bearings
- Brackets, Flanges & Hangers
- Clutch Plates
- Filters
- Flywheel
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Lighting - Instrumentation
- Manual Transmission Components
- Sensors
- Switches, Solenoids & Actuators
- Transmission Components
- Transmission Hard Parts
Control Modules for 1996 GMC Sonoma
7
- $49.72Crankshaft SensorGMUpgrade your engine's performance with the Genuine GM OEM Engine Crankshaft Position Sensor (MPN: 10456614), designed for 2.2L and 2.4L Chevrolet engines. This critical engine management component ensures precise fuel injection timing and ignition control ...
- Engine Crankshaft Position SensorGM2.2L, without dohc. Cavalier, Sunfire. 2.2l. Ohv. Helps keep engine timing and fuel injection running in sync Helps provide proper alignment, positioning, and spacing for easy installation Synchronizes engine valves and pistons for excellent engine performance (Unavailable)
No.
Part # / Description / Price
Price
1
Powertrain Control Module, Remanufactured 
GM
GM Description: Genuine GM OEM Powertrain Control Module (PCM), Remanufactured, MPN 16215830, designed for Chevrolet Cavalier and Pontiac Sunfire models equipped with 2.2L, 2.3L, and 2.4L four-cylinder engines. This critical engine control computer regulates fuel injectio ...
MSRP $261.14
$142.97
MSRP $261.14
$142.97
5
Ignition Coil GM
GM Description: The Genuine GM OEM Ignition Coil (MPN: 19418991) is a direct-fit replacement component designed to deliver reliable spark plug ignition for select GM vehicles. This authentic General Motors ignition coil ensures optimal engine performance and cold-start re ...
MSRP $110.40
$61.16
MSRP $110.40
$61.16
6
Ignition Coil Seal GM
GM Description: Upgrade your ignition system with the Genuine GM OEM Ignition Coil Seal (MPN: 19260632), engineered to provide reliable sealing and protection for distributorless ignition systems across multiple GM engine platforms. This authentic General Motors component ...
MSRP $4.82
$2.87
MSRP $4.82
$2.87
7
Engine Crankshaft Position Sensor GM
GM Description: Upgrade your engine's performance with the Genuine GM OEM Engine Crankshaft Position Sensor (MPN: 10456614), designed for 2.2L and 2.4L Chevrolet engines. This critical engine management component ensures precise fuel injection timing and ignition control ...
MSRP $50.20
$49.72
MSRP $50.20
$49.72
7
Engine Crankshaft Position Sensor GM
GM Description: 2.2L, without dohc. Cavalier, Sunfire. 2.2l. Ohv. Helps keep engine timing and fuel injection running in sync
Helps provide proper alignment, positioning, and spacing for easy installation
Synchronizes engine valves and pistons for excellent engine performance