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1991 GMC K3500 Thermostats

Looking for aftermarket parts to modify or upgrade your 1991 GMC K3500 with thermostats? At Tunersports.com we carry a huge selection of the top name brand performance thermostat parts and accessories for your K3500.

Whether you have a 1991 GMC K3500 in Sierra to Sierra SLX trim we have you covered. We have 2 thermostats available parts to mod your K3500. All parts have free shipping to the Continental US 48 States.

1991 K3500 Thermostat Parts:

Only show in-stock parts

Gates Thermostats

OUT OF STOCK 33428 Gates 1986-2005 Buick LeSabre V-6 3.8L Thermostat 1991-1993 GMC K3500 Sierra / Sierra SLX 1991-1995 GMC K3500 Sierra SLE $30.99 Details
OUT OF STOCK 33429S Gates 86-05 Buick LeSabre V6 3.8L 195 Degree Reverse Poppet Thermostat 1991-1993 GMC K3500 Sierra / Sierra SLX 1991-1995 GMC K3500 Sierra SLE $35.97 Details