Contact Us Live Chat or 1-888-220-8330
Search Bar
Search by Part Number or Keywords
  • My Garage
  • My Account
  • Cart
  • Body & Mirrors
  • Chassis & Brakes
  • Engine & Drivetrain
  • Electrical & Lighting
Help Center
< Back ×
Replacement and OEM Parts for 2018 GMC Sierra 3500 HD Relays, Wiring, Connectors & Components

2018 GMC Sierra 3500 HD Relays, Wiring, Connectors & Components

My Vehicle Change Vehicle
2018 GMC Sierra 3500 HD
Change Vehicle
Vehicle Options
We need more information about your vehicle to make a correct determination of fitment

17 products about 2018 GMC Sierra 3500 HD Relays, Wiring, Connectors & Components found

Show Item:
  • 30
  • 60
  • 90
Sort by:
Recommended
Filter
Sort
View by
  • OEM (Genuine) 2018 GMC Sierra 3500 HD Socket & Wire

    PartNumber: 84058337
    OEM 2018 GMC Sierra 3500 HD Socket & Wire - 84058337
    Product Specifications
    • Other Names: Harness, Socket Wire
    • Item Dimensions: 3.5 x 1.5 x 1.1 inches
    • Fitment Type: Direct Replacement
    • Replaces: 22869173
    • Part Description: 2018 GMC Sierra 3500 HD Socket & Wire
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | Base, Denali, SLE, SLT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $14.43 MSRP: $22.89
    You Save: $8.46 (37%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD Harness

    PartNumber: 84445380
    OEM 2018 GMC Sierra 3500 HD Harness - 84445380
    Product Specifications
    • Notes: GMC, W/Led, W/Park Assist
    • Other Names: Harness
    • Item Dimensions: 23.5 x 9.9 x 5.9 inches
    • Item Weight: 2.80 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 23403936, 84185681
    • Part Description: 2018 GMC Sierra 3500 HD Harness
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | Base, Denali, SLE, SLT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL
    $99.66 MSRP: $158.25
    You Save: $58.59 (38%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD Harness

    PartNumber: 84445387
    OEM 2018 GMC Sierra 3500 HD Harness - 84445387
    Product Specifications
    • Notes: GMC, W/Led, W/O Park Assist
    • Other Names: Harness
    • Item Dimensions: 22.8 x 9.8 x 5.9 inches
    • Item Weight: 2.90 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 84024990, 84185688, 84185689, 84445388, 84024991, 84445379
    • Part Description: 2018 GMC Sierra 3500 HD Harness
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | Base, Denali, SLE, SLT | 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL
    $96.68 MSRP: $153.51
    You Save: $56.83 (38%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD Ground Cable

    PartNumber: 23249195
    OEM 2018 GMC Sierra 3500 HD Ground Cable - 23249195
    Product Specifications
    • Notes: 6.0 Liter, Main Battery, 220 Amp Alternator
    • Other Names: Ground Cable
    • Item Dimensions: 6.3 x 2.0 x 13.4 inches
    • Item Weight: 1.20 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 23479660, 15921158, 22958884, 22759558
    • Part Description: 2018 GMC Sierra 3500 HD Ground Cable
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL
    $27.01 MSRP: $50.98
    You Save: $23.97 (48%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD Ground Cable

    PartNumber: 23481289
    OEM 2018 GMC Sierra 3500 HD Ground Cable - 23481289
    Product Specifications
    • Notes: 6.6 Liter Diesel, Main Battery, W/Dual Alternator
    • Other Names: Ground Cable
    • Item Dimensions: 2.1 x 18.7 x 1.0 inches
    • Item Weight: 1.20 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2018 GMC Sierra 3500 HD Ground Cable
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL
    $34.51 MSRP: $62.76
    You Save: $28.25 (46%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD Ground Cable

    PartNumber: 84247240
    OEM 2018 GMC Sierra 3500 HD Ground Cable - 84247240
    Product Specifications
    • Notes: 6.6 Liter Diesel, Main Battery, W/O Dual Alternator
    • Other Names: Ground Cable
    • Item Dimensions: 8.2 x 2.1 x 1.1 inches
    • Item Weight: 0.70 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 23481290
    • Part Description: 2018 GMC Sierra 3500 HD Ground Cable
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL
    $18.77 MSRP: $35.40
    You Save: $16.63 (47%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD Ground Cable

    PartNumber: 23179342
    OEM 2018 GMC Sierra 3500 HD Ground Cable - 23179342
    Product Specifications
    • Notes: 6.0 Liter, Main Battery, 150 Amp Alternator
    • Other Names: Ground Cable
    • Item Dimensions: 5.1 x 5.2 x 20.0 inches
    • Item Weight: 2.30 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2018 GMC Sierra 3500 HD Ground Cable
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | Base, Denali, SLE, SLT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
    $13.33 MSRP: $25.14
    You Save: $11.81 (47%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD ECM Relay

    PartNumber: 13500126
    OEM 2018 GMC Sierra 3500 HD ECM Relay - 13500126
    Product Specifications
    • Notes: Instrument Panel, Black
    • Location: Driver Side; Passenger Side
    • Item Dimensions: 1.9 x 1.5 x 0.7 inches
    • Item Weight: 0.40 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 92199311, 92181835, 12077866, 12135180, 15393413, 19115082, 15328867, 19116058
    • Part Description: 2018 GMC Sierra 3500 HD ECM Relay
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL
    $11.30 MSRP: $20.44
    You Save: $9.14 (45%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD ECM Relay

    PartNumber: 13500126
    OEM 2018 GMC Sierra 3500 HD ECM Relay - 13500126
    Product Specifications
    • Notes: Instrument Panel, Black
    • Location: Driver Side; Passenger Side
    • Item Dimensions: 1.9 x 1.5 x 0.7 inches
    • Item Weight: 0.40 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 92199311, 92181835, 12077866, 12135180, 15393413, 19115082, 15328867, 19116058
    • Part Description: 2018 GMC Sierra 3500 HD ECM Relay
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL
    $11.30 MSRP: $20.44
    You Save: $9.14 (45%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD ECM Relay

    PartNumber: 13500126
    OEM 2018 GMC Sierra 3500 HD ECM Relay - 13500126
    Product Specifications
    • Notes: Instrument Panel, Black
    • Location: Driver Side; Passenger Side
    • Item Dimensions: 1.9 x 1.5 x 0.7 inches
    • Item Weight: 0.40 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 92199311, 92181835, 12077866, 12135180, 15393413, 19115082, 15328867, 19116058
    • Part Description: 2018 GMC Sierra 3500 HD ECM Relay
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL
    $11.30 MSRP: $20.44
    You Save: $9.14 (45%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD ECM Relay

    PartNumber: 13500126
    OEM 2018 GMC Sierra 3500 HD ECM Relay - 13500126
    Product Specifications
    • Notes: Instrument Panel, Black
    • Location: Driver Side; Passenger Side
    • Item Dimensions: 1.9 x 1.5 x 0.7 inches
    • Item Weight: 0.40 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 92199311, 92181835, 12077866, 12135180, 15393413, 19115082, 15328867, 19116058
    • Part Description: 2018 GMC Sierra 3500 HD ECM Relay
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL
    $11.30 MSRP: $20.44
    You Save: $9.14 (45%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD AC Relay

    PartNumber: 13500114
    OEM 2018 GMC Sierra 3500 HD AC Relay - 13500114
    Product Specifications
    • Notes: Instrument Panel, Gray
    • Location: Driver Side; Passenger Side
    • Item Dimensions: 3.8 x 2.2 x 0.7 inches
    • Item Weight: 0.40 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12193606, 19115080, 15328866, 12135034, 15393412, 12088567, 12135170, 19116057
    • Part Description: 2018 GMC Sierra 3500 HD AC Relay
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $9.31 MSRP: $19.52
    You Save: $10.21 (53%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD AC Relay

    PartNumber: 13500114
    OEM 2018 GMC Sierra 3500 HD AC Relay - 13500114
    Product Specifications
    • Notes: Instrument Panel, Gray
    • Location: Driver Side; Passenger Side
    • Item Dimensions: 3.8 x 2.2 x 0.7 inches
    • Item Weight: 0.40 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12193606, 19115080, 15328866, 12135034, 15393412, 12088567, 12135170, 19116057
    • Part Description: 2018 GMC Sierra 3500 HD AC Relay
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $9.31 MSRP: $19.52
    You Save: $10.21 (53%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD AC Relay

    PartNumber: 13500114
    OEM 2018 GMC Sierra 3500 HD AC Relay - 13500114
    Product Specifications
    • Notes: Instrument Panel, Gray
    • Location: Driver Side; Passenger Side
    • Item Dimensions: 3.8 x 2.2 x 0.7 inches
    • Item Weight: 0.40 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12193606, 19115080, 15328866, 12135034, 15393412, 12088567, 12135170, 19116057
    • Part Description: 2018 GMC Sierra 3500 HD AC Relay
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $9.31 MSRP: $19.52
    You Save: $10.21 (53%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD AC Relay

    PartNumber: 13500114
    OEM 2018 GMC Sierra 3500 HD AC Relay - 13500114
    Product Specifications
    • Notes: Instrument Panel, Gray
    • Location: Driver Side; Passenger Side
    • Item Dimensions: 3.8 x 2.2 x 0.7 inches
    • Item Weight: 0.40 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12193606, 19115080, 15328866, 12135034, 15393412, 12088567, 12135170, 19116057
    • Part Description: 2018 GMC Sierra 3500 HD AC Relay
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $9.31 MSRP: $19.52
    You Save: $10.21 (53%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD AC Relay

    PartNumber: 13500114
    OEM 2018 GMC Sierra 3500 HD AC Relay - 13500114
    Product Specifications
    • Notes: Instrument Panel, Gray
    • Location: Driver Side; Passenger Side
    • Item Dimensions: 3.8 x 2.2 x 0.7 inches
    • Item Weight: 0.40 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12193606, 19115080, 15328866, 12135034, 15393412, 12088567, 12135170, 19116057
    • Part Description: 2018 GMC Sierra 3500 HD AC Relay
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $9.31 MSRP: $19.52
    You Save: $10.21 (53%)
  • OEM (Genuine) 2018 GMC Sierra 3500 HD AC Relay

    PartNumber: 13500114
    OEM 2018 GMC Sierra 3500 HD AC Relay - 13500114
    Product Specifications
    • Notes: Instrument Panel, Gray
    • Location: Driver Side; Passenger Side
    • Item Dimensions: 3.8 x 2.2 x 0.7 inches
    • Item Weight: 0.40 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12193606, 19115080, 15328866, 12135034, 15393412, 12088567, 12135170, 19116057
    • Part Description: 2018 GMC Sierra 3500 HD AC Relay
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $9.31 MSRP: $19.52
    You Save: $10.21 (53%)