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Choose your trim in My Garage to confirm exact fit.
Exact-fit parts for the 1978 Chevrolet K20 Suburban Custom Deluxe.
ATP
Part # SO-34
$9.51
Standard Motor Products
Part # TC427
$19.85
ATP
Part # SMS-9
$298.27
Continental
Part # AC89312
$34.71
Dorman
Part # 740-650
$50.27
Sunsong
Part # 3401332
$16.31
Standard Motor Products
Part # RY-23
$26.60
Dorman
Part # 74326
$12.51
Standard Motor Products
Part # US-61LB
$24.48
Dorman
Part # 211R-HP
$16.28
Four Seasons
Part # 35182
$107.90
Standard Motor Products
Part # RY-333
$54.35
Standard Motor Products
Part # S-84
$2.66
Standard Motor Products
Part # DR-450
$25.72
Standard Motor Products
Part # HN-16
$38.17
Edelmann
Part # 70911
$32.36
Rostra
Part # 63-0003
$21.95
ATP
Part # YA-18
$12.78
Dorman
Part # 83232
$14.87
Standard Motor Products
Part # MR-10
$70.91
This page groups parts listed for the 1978 Chevrolet K20 Suburban Custom Deluxe. Some products fit every trim, while others depend on submodel, engine, drivetrain, or brake package. Use your trim in My Garage or the product page fitment check to confirm exact fit.
We offer a wide selection of wiring & electrical parts for the 1978 Chevrolet K20 Suburban Custom Deluxe. This page narrows the catalog to the year, make, and model; use your trim on product pages to confirm exact fit when a part only fits certain submodels.
We carry parts from trusted brands including Standard Motor Products, Dorman, ATP, Four Seasons, and Rostra, plus many more. Filter by brand to find your preferred manufacturer.
Most in-stock items ship within 1-2 business days. Shipping rates are calculated at checkout based on your location.
Warranty coverage varies by manufacturer but typically ranges from 1 year to lifetime. Each product page includes specific warranty information from the manufacturer.
