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Choose your trim in My Garage to confirm exact fit.
Exact-fit parts for the 1988 GMC R3500 High Sierra.
Dee Zee
Part # DZ95054RTB
$464.82
Undercover
Part # SC900D
$210.57
Putco
Part # 49810
$728.06
Dee Zee
Part # DZ95002
$45.99
Dee Zee
Part # DZ1808
$27.12
AMP Research
Part # 74804-00A
$329.99
Truxedo
Part # 1705211
$165.99
AMP Research
Part # 74804-01A
$329.99
Dee Zee
Part # DZ1800
$41.52
Dee Zee
Part # DZ17939
$20.48
AMP Research
Part # 74607-01A
$9.99
Putco
Part # 51611P
$103.33
Putco
Part # 97102
$259.06
Truxedo
Part # 1704211
$14.99
Dee Zee
Part # DZ3700301
$284.17
Truxedo
Part # 1704511
$21.99
Putco
Part # 59810
$437.53
Dee Zee
Part # DZ1808TB
$32.86
Thule
Part # 500XTB
$1174.85
Westin
Part # 25-0505
$268.81
This page groups parts listed for the 1988 GMC R3500 High Sierra. 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 1988 GMC R3500 High Sierra. 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 Dee Zee, Access, Putco, BAK, and Pace Edwards, 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.
