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Choose your trim in My Garage to confirm exact fit.
Exact-fit parts for the 1999 GMC K1500 Sierra SL.
Retrax
Part # 60412
$1699.99
WeatherTech
Part # 110005
$93.95
Dee Zee
Part # DZ95002
$45.99
Dee Zee
Part # DZ95054RTB
$464.82
Rampage
Part # 16180
$246.62
Thule
Part # 27000XTB
$755.64
Thule
Part # 500XTB
$1174.85
Thule
Part # 21501
$606.14
Thule
Part # 37002XT
$977.40
Dee Zee
Part # DZ66311B
$471.30
Retrax
Part # 80412
$2199.99
Dee Zee
Part # DZ16113
$513.42
Truxedo
Part # 1705211
$165.99
Westin
Part # 22-5020
$399.16
AMP Research
Part # 74607-01A
$9.99
Truxedo
Part # 1704511
$21.99
AMP Research
Part # 74804-01A
$329.99
Thule
Part # 43002XT
$1031.60
Husky Liners
Part # 56221
$59.99
Westin
Part # 22-6025
$328.01
This page groups parts listed for the 1999 GMC K1500 Sierra SL. 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 exterior accessories parts for the 1999 GMC K1500 Sierra SL. 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 Access, Dee Zee, BAK, Pace Edwards, and Thule, 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.
