1978 GMC G-Series A/C Relays, Sensors & Switches
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Four Seasons®System Mounted Low Cut-Out Pressure SwitchGMC G-Series 1978, System Mounted Low Cut-Out Pressure Switch by Four Seasons®. With Round Connector Shape. Location: To Compressor. Type: 2 Terminals. Finish: Black/Green. Products are engineered and tested to provide years of trouble...Contains gaskets, o-rings, or seals to properly replace the productColor coded for easy identification$27.77 - Standard®HVAC Blower Control SwitchGMC G-Series 1978, HVAC Blower Control Switch by Standard®. Front. Type: 4 Blade Male Terminal. Number Of Switch Positions: 4. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest...Standard switches are designed using copper alloy conductors to ensure superior electrical conductivity with low resistive lossesStandard parts are 100% tested to verify both mechanical and electrical switching performance$18.89
- gpd®A/C Clutch Cycle SwitchGMC G15 1978, A/C Clutch Cycle Switch by gpd®. Location: Accumulator Mounted. The electrical switch is designed to give feedback to the engine management system. The ECM controls the A/C system on modern vehicles. In earlier vehicles,...Designed to meet/exceed OE fit, form and functionDurability tested on every new design$9.13
- Standard®HVAC Blower Motor ConnectorGMC G-Series 1978, HVAC Blower Motor Connector by Standard®. Type: 4 Blade Female Terminal. Finish: Black. Wire Quantity: 4. Harness Length: 6 1/2". Standard is to be the leading independent supplier to the automotive aftermarket,...Offering hundreds of high-quality pigtails and sockets for nearly every electrical jobUtilizing high grade materials to ensure peak conductivity and perfect connections$19.55
- UAC®HVAC Pressure SwitchGMC G-Series 1978, HVAC Pressure Switch by UAC®. System Mounted LPCO. UAC’s line of electrical components includes the Switches and Relays that are necessary for the proper function of an A/C System. They are produced at top tier...Helps maintain a desired temperature inside your carMade of durable materials$7.04
- Four Seasons®A/C Clutch Cycle SwitchGMC G-Series 1978, A/C Clutch Cycle Switch by Four Seasons®. Finish: Black. Products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile A/C experience, fix it once and fix it right...Contains gaskets, o-rings, or seals to properly replace the productPrecision engineered$23.64
- Four Seasons®HVAC Pressure SwitchGMC G-Series 1978, HVAC Pressure Switch by Four Seasons®. With Connector. Location: To Compressor. Type: 2 Terminals. Finish: Blue. Products are engineered and tested to provide years of trouble free operation. Backed by over 50 years...Contains gaskets, o-rings, or seals to properly replace the productColor coded for easy identification$31.38
- Four Seasons®A/C Compressor Cut-Out SwitchGMC G-Series 1978, A/C Compressor Cut-Out Switch by Four Seasons®. High Pressure Compressor Mounted. Without Connector. Type: 2 Terminals. Finish: Blue. Products are engineered and tested to provide years of trouble free operation....Contains gaskets, o-rings, or seals to properly replace the productColor coded for easy identification$17.12
- Four Seasons®A/C Compressor Cut-Out Switch Harness ConnectorGMC G-Series 1978, A/C Compressor Cut-Out Switch Harness Connector by Four Seasons®. High and Low Pressure. With Round Connector Shape. Location: To Compressor. Type: 2 Terminals. Finish: Blue/Red/White. Products are engineered and...OE style connectorsMolded plastic construction$14.07
- Four Seasons®A/C Compressor Wiring HarnessGMC G-Series with A6 Compressor / with R4 Compressor 1978, A/C Compressor Wiring Harness by Four Seasons®. With 2 Spade Rectangle Connector. Type: 2 Terminals. Products are engineered and tested to provide years of trouble free...OE style connectorsMolded plastic construction$8.89
- Four Seasons®HVAC Harness ConnectorGMC G-Series 1978, HVAC Harness Connector by Four Seasons®. Type: 5 Terminals. Products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile A/C experience, fix it once and fix it right...Molded plastic constructionOE style connectors$15.86
- Four Seasons®Harness Connector AdapterGMC G-Series with A6 Compressor / with R4 Compressor 1978, Harness Connector Adapter by Four Seasons®. Products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile A/C experience, fix...Precision moldedOE style connectors$9.42 - $10.31
- Four Seasons®Lever Selector Blower SwitchGMC G-Series 1978, Lever Selector Blower Switch by Four Seasons®. With Rectangle Connector Shape. Type: 4 Terminals. With Lever. Products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of...Vehicle specific applicationsZinc coated to resist corrosion$15.91
- gpd®A/C Compressor Cut-Out SwitchGMC G15 1978, A/C Compressor Cut-Out Switch by gpd®. Low Pressure. The electrical switch is designed to give feedback to the engine management system. The ECM controls the A/C system on modern vehicles. In earlier vehicles, they are...Designed to meet/exceed OE fit, form and functionDurability tested on every new design$14.25
- gpd®A/C Thermo SwitchGMC G15 1978, A/C Thermo Switch by gpd®. The electrical switch is designed to give feedback to the engine management system. The ECM controls the A/C system on modern vehicles. In earlier vehicles, they are used to directly turn the...Designed to meet/exceed OE fit, form and functionDurability tested on every new design$19.43
- gpd®HVAC Blower RelayGMC G15 1978, HVAC Blower Relay by gpd®. Finish: Silver. The electrical switch is designed to give feedback to the engine management system. The ECM controls the A/C system on modern vehicles. In earlier vehicles, they are used to...Designed to meet/exceed OE fit, form and functionDurability tested on every new design$14.19
- Dorman®HVAC Clutch Coil ConnectorGMC G-Series 1978, HVAC Clutch Coil Connector by Dorman®. Non-Weatherpack Style. Type: Blade Female Terminal. Wire Quantity: 2. Overall Length: 7". Non-Weatherpack Style. Dorman offers a comprehensive line of A/C Clutch Coil Connectors...Direct replacement A/C Clutch Coil Connectors available (where applicable) to ensure a proper fitVehicle try-on testing has been conducted on this part to ensure a trouble-free performance$8.62
- WVE®HVAC Blower Control SwitchGMC G15 / G25 1978, HVAC Blower Control Switch by WVE®. Front. Without Rotary Switch. 4 Terminals. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$11.48
- Four Seasons®Electric Mode Selector SwitchGMC G-Series 1978, Electric Mode Selector Switch by Four Seasons®. With Rectangle Connector Shape. Products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile A/C experience, fix it...Vehicle specific applicationsZinc coated to resist corrosion$43.17
- Four Seasons®HVAC Blower Relay Harness ConnectorGMC G-Series 1978, HVAC Blower Relay Harness Connector by Four Seasons®. With 3 Hole Mounting Bracket. Type: 5 Terminals. Products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile...OE style connectorsMolded plastic construction$15.30
- Four Seasons®HVAC Blower Switch ConnectorGMC G-Series 1978, HVAC Blower Switch Connector by Four Seasons®. Front. With Lever. Type: 4 Terminals. Products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile A/C experience, fix...OE style connectorsMolded plastic construction$25.13
- Dorman®HVAC Switch ConnectorGMC G-Series 1978, HVAC Switch Connector by Dorman®. Type: Spade Female Terminal. Wire Quantity: 2. Overall Length: 5". Improved wiring and highly durable insulation resist the corrosion, overheating and melting that commonly afflict...Save time and expense by replacing the part, not the entire harnessBulb simply plugs into socket for ease of installation$8.74
- Standard®A/C Selector SwitchGMC G-Series with A/C 1978, A/C Selector Switch by Standard®. With Rotary. Type: 4 Blade Male Terminal. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products,...Standard switches are designed using copper alloy conductors to ensure superior electrical conductivity with low resistive lossesStandard parts are 100% tested to verify both mechanical and electrical switching performance$37.65
- Standard®Handypack™ HVAC Blower Motor ConnectorGMC G-Series 1978, Handypack™ HVAC Blower Motor Connector by Standard®. Type: 4 Female Terminal. Finish: Black. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products,...The handypack™ program is the most complete wiring center with 17 assortments available. Featuring application and non-application electrical products, handypack™ has the products and tools needed to get your electrical job done right.Pigtail and Socket Assembly$17.49
- WVE®HVAC Blower Motor Resistor ConnectorGMC G-Series with A/C 1978, HVAC Blower Motor Resistor Connector by WVE®. Front. With 4 Terminals. Location: To Main Unit. 4 Wire Harness. Replace your worn-out or faulty component with this quality replacement from WVE. This product is...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$8.28
- WVE®HVAC Blower Switch ConnectorGMC G15 / G25 1978, HVAC Blower Switch Connector by WVE®. Black. With 4 Terminals and Female Connector. Location: On Main Blower. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$23.48
- Dorman®HVAC Blower Motor Resistor ConnectorGMC G-Series with A/C 1978, HVAC Blower Motor Resistor Connector by Dorman®. Type: Blade Female Terminal. Wire Quantity: 4. Overall Length: 5.5". Dorman’s Blower Motor Resistor promptly returns your vehicle’s heating and cooling...Simply plugs into the blower motor resistor for ease of installationUniquely available in a kit that includes the blower motor resistor, an essential component of most repairs$8.54
- gpd®HVAC Blower Control SwitchGMC G15 1978, HVAC Blower Control Switch by gpd®. Blower Selector Switch. The electrical switch is designed to give feedback to the engine management system. The ECM controls the A/C system on modern vehicles. In earlier vehicles, they...Designed to meet/exceed OE fit, form and functionDurability tested on every new design$8.61
- gpd®A/C Selector SwitchGMC G15 1978, A/C Selector Switch by gpd®. The accumulator/receiver drier is designed to remove moisture from the A/C system. Every time the A/C system is opened, the accumulator/receiver drier must be replaced. Changing the...Designed to meet/exceed OE fit, form and functionDurability tested on every new design$34.98
- United Motor Products®HVAC Blower Control Switch ConnectorGMC G15 1978, HVAC Blower Control Switch Connector by United Motor Products®. Black. With 4 Female Terminals. Keep your pride and joy operating as it should with this top-notch part from United Motors Products. It’s made using the...Excellent replacement for your worn out factory partWill help make your vehicle running as good as new$14.33
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1978 GMC G-Series A/C Relays, Sensors Reviews
1 review
Cycling Clutch Sensor
Supercool® - Cycling Pressure SwitchPosted by Jose Manuel (Katy, TX) / June 16, 20201992 Hyundai Sonata
1978 GMC G-Series Models
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