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GMC R3500 Thermostats

Great cars and trucks like your R3500 need great parts.

When your GMC R3500 left the factory, it was destined for a driver who values longevity in their automobile. Your GMC dealership isn't the only place to buy trusted parts to repair your R3500. Make no mistake, you didn't buy your R3500 unless you understood you would be getting horsepower and rugged design both rolled up into one automobile. You bought your R3500 because its dependability and trusted quality agreed with your nature; so why would you be okay with anything but the best when it comes to great quality auto parts?

What Thermostats does for your vehicle.

Your car or truck has a water-cooled motor, and the device that controls the flow of coolant so that the engine can remain cool is your thermostat. On start-up, the thermostat remains closed; shutting off access to the radiator. This cycles the coolant through the engine block and gets it hot. Once it reaches the right temperature, your GMC R3500 thermostat then opens up and allows the coolant into the radiator. Now your coolant is part of a constant cycle in your GMC R3500 engine that keeps it within a specific range of temperatures that are ideal for engine performance... all thanks to the thermostat.

Good products, great prices, knowledgeable professionals.

Select Your YearTrust in the value of the parts you get from carpartsdiscount.com and realize incredible savings on all your upcoming repairs. Ordering new GMC parts from www.carpartsdiscount.com means you are paying the lowest prices for the absolute greatest original and aftermarket replacement R3500 parts on the internet. When your GMC needs the best replacement Thermostats, there's no need to waste time looking anywhere other than the authority, Car Parts Discount. When it comes to GMC R3500 Thermostats parts, you can find them for 1991, 1990, 1989, 1988, 1987 models by clicking the appropriate year below.

Info: Select your make and model in the red title bar above so we can show the parts you need.
Select Your Year
Motorad
1987-1991 GMC R3500 Motorad Engine Coolant Thermostat 300-160
1.35, Save 41%   NEW ITEM
OEM: 300-160, Item: 1405010
  In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

Motorad
1987-1991 GMC R3500 Motorad Engine Coolant Thermostat 300-180
1.35, Save 41%   NEW ITEM
OEM: 300-180, Item: 1405011
  Only 5 left In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 13006Stant
1987-1991 GMC R3500 Stant Engine Coolant Thermostat 13006
1.95, Save 38%   NEW ITEM
OEM: 13006, Item: 1201190
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 13008Stant
1987-1991 GMC R3500 Stant Engine Coolant Thermostat 13008
1.95, Save 38%   NEW ITEM
OEM: 13008, Item: 1201191
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12TE1BACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 12TE1B
2.15, Save 40%   NEW ITEM
OEM: 12TE1B, Item: 885094
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12TE1DACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 12TE1D
2.15, Save 40%   NEW ITEM
OEM: 12TE1D, Item: 885095
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12TE1EACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 12TE1E
2.15, Save 40%   NEW ITEM
OEM: 12TE1E, Item: 890423
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Motorad
1987-1991 GMC R3500 Motorad Engine Coolant Thermostat 200-160
2.25, Save 42%   POPULAR
OEM: 200-160, Item: 1404893
  Only 2 left In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12T6DACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 12T6D
2.25, Save 40%  
OEM: 12T6D, Item: 885184
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Motorad
1987-1991 GMC R3500 Motorad Engine Coolant Thermostat 200-180
2.45, Save 40%   NEW ITEM
OEM: 200-180, Item: 1404894
  Only 3 left In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

Motorad
1987-1991 GMC R3500 Motorad Engine Coolant Thermostat 200-195
2.75, Save 41%   NEW ITEM
OEM: 200-195, Item: 1407275
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Gates Engine Coolant Thermostat, OEM: 33508Gates
1987-1991 GMC R3500 Gates Engine Coolant Thermostat
3.15, Save 40%   NEW ITEM
OEM: 33508, Item: 242855
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 13352Stant
1987-1991 GMC R3500 Stant Engine Coolant Thermostat 13352
3.35, Save 41%   NEW ITEM
OEM: 13352, Item: 642456
  Only 1 left In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 33006Gates
1987-1991 GMC R3500 Gates Engine Coolant Thermostat 33006
3.45, Save 40%   NEW ITEM
OEM: 33006, Item: 621043
  Only 6 left In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 13356Stant
1987-1991 GMC R3500 Stant Engine Coolant Thermostat 13356
3.55, Save 39%   POPULAR
OEM: 13356, Item: 383500
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12T1DACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 12T1D
3.55, Save 39%   NEW ITEM
OEM: 12T1D, Item: 885136
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12T1FACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 12T1F
3.55, Save 39%   NEW ITEM
OEM: 12T1F, Item: 1215357
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12T4DACDelco
1991 GMC R3500 ACDelco Engine Coolant Thermostat 12T4D
3.55, Save 40%   NEW ITEM
OEM: 12T4D, Item: 885172
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12T1BACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 12T1B
3.65, Save 41%   NEW ITEM
OEM: 12T1B, Item: 885135
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12T1EACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 12T1E
3.65, Save 40%   NEW ITEM
OEM: 12T1E, Item: 890426
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12T4EACDelco
1991 GMC R3500 ACDelco Engine Coolant Thermostat 12T4E
3.65, Save 40%   NEW ITEM
OEM: 12T4E, Item: 890429
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Thermostat, 82C / 180F, OEM: 9605555382Motorad
1991 GMC R3500 Motorad Thermostat, 82C / 180F 9605555382
3.75, Save 26%   NEW ITEM
OEM: 9605555382, Item: 100181
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Motorad
1987-1991 GMC R3500 Motorad Engine Coolant Thermostat 2000-160
3.95, Save 40%   NEW ITEM
OEM: 2000-160, Item: 1407569
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Motorad
1987-1991 GMC R3500 Motorad Engine Coolant Thermostat 2000-180
3.95, Save 40%   NEW ITEM
OEM: 2000-180, Item: 1411350
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Motorad
1987-1991 GMC R3500 Motorad Engine Coolant Thermostat 2000-195
3.95, Save 40%   NEW ITEM
OEM: 2000-195, Item: 1407570
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12T6BACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 12T6B
4.35, Save 39%  
OEM: 12T6B, Item: 885183
  Only 6 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 45359Stant
1987-1991 GMC R3500 Stant Engine Coolant Thermostat 45359
4.45, Save 39%   NEW ITEM
OEM: 45359, Item: 642634
  In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 45358Stant
1987-1991 GMC R3500 Stant Engine Coolant Thermostat 45358
4.55, Save 40%   NEW ITEM
OEM: 45358, Item: 383798
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12TP1DACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 12TP1D
4.65, Save 39%   NEW ITEM
OEM: 12TP1D, Item: 885118
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12TP1EACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 12TP1E
4.75, Save 39%   NEW ITEM
OEM: 12TP1E, Item: 890424
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12TP5DACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 12TP5D
4.85, Save 40%   NEW ITEM
OEM: 12TP5D, Item: 885128
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12TP4DACDelco
1991 GMC R3500 ACDelco Engine Coolant Thermostat 12TP4D
5.55, Save 39%   NEW ITEM
OEM: 12TP4D, Item: 885126
  Only 4 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12TP4EACDelco
1991 GMC R3500 ACDelco Engine Coolant Thermostat 12TP4E
5.55, Save 39%   NEW ITEM
OEM: 12TP4E, Item: 885127
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Motorad
1987-1991 GMC R3500 Motorad Engine Coolant Thermostat 7200-160
5.75, Save 40%   NEW ITEM
OEM: 7200-160, Item: 1409345
  Only 2 left In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 131-87/13187ACDelco
1987-1990 GMC R3500 ACDelco Engine Coolant Thermostat 131-87
8.15, Save 39%   NEW ITEM
OEM: 131-87, Item: 692590
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 131-73/13173ACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 131-73
8.95, Save 39%   NEW ITEM
OEM: 131-73, Item: 887742
  Only 2 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 132-55/13255ACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 132-55
10.45, Save 40%   NEW ITEM
OEM: 132-55, Item: 887750
  Only 6 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 131-122/131122ACDelco
1991 GMC R3500 ACDelco Engine Coolant Thermostat 131-122
12.85, Save 40%   NEW ITEM
OEM: 131-122, Item: 887724
  Only 5 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Mr. Gasket
1987-1991 GMC R3500 Mr. Gasket Engine Coolant Thermostat 4363
Add for Price, Save 38%   NEW ITEM
OEM: 4363, Item: 1397837
  Only 4 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Mr. Gasket
1987-1991 GMC R3500 Mr. Gasket Engine Coolant Thermostat 4364
Add for Price, Save 38%   NEW ITEM
OEM: 4364, Item: 1397838
  Only 2 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 14429Stant
1987-1991 GMC R3500 Stant Engine Coolant Thermostat 14429
18.05, Save 39%   NEW ITEM
OEM: 14429, Item: 383624
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Gates Engine Coolant Thermostat, OEM: 33924Gates
1987-1991 GMC R3500 Gates Engine Coolant Thermostat
19.85, Save 40%   NEW ITEM
OEM: 33924, Item: 242868
  Only 3 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: MMTS-WRA-87L/MMTSWRA87LMishimoto
1987-1988, 1991 GMC R3500 Mishimoto Engine Coolant Thermostat MMTS-WRA-87L
Add for Price, Save 36%   NEW ITEM
OEM: MMTS-WRA-87L, Item: 1335663
  Only 6 left In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: MMTS-MUS-86/MMTSMUS86Mishimoto
1987-1988, 1991 GMC R3500 Mishimoto Engine Coolant Thermostat MMTS-MUS-86
Add for Price, Save 36%   NEW ITEM
OEM: MMTS-MUS-86, Item: 1335775
  Only 2 left In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

Mishimoto
1987-1988, 1991 GMC R3500 Mishimoto Engine Coolant Thermostat MMTS-MUS-86A
Add for Price, Save 36%   NEW ITEM
OEM: MMTS-MUS-86A, Item: 1359008
  Only 1 left In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

GMC R3500 Engine Coolant Thermostat, OEM: 12TP1BACDelco
1987-1991 GMC R3500 ACDelco Engine Coolant Thermostat 12TP1B
4.65, Save 40%   NO STOCK
OEM: 12TP1B, Item: 885117
  Restock date not known
Select year, make, model above to verify this part fits your vehicle