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A-Premium Engine Coolant Thermostat and Housing Assembly - 8Cyl, 4.3L 5.3 6.2L - Compatible with Chevy, GMC, Cadillac Vehicles - Silverado 1500, Suburban, Tahoe, Sierra, Yukon XL, for# 12674639

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$21.39

$ 10 .99 $10.99

In Stock
  • [Vehicle Fitment]: Compatible with Chevrolet Corvette 2014 6.2L, Silverado 1500 2014-2018 4.3L 5.3L 6.2L, Silverado 1500 LD 2019 5.3L, Suburban 2015-2020, Tahoe 2014-2020; Compatible with GMC Sierra 1500 2014-2018 4.3L 5.3L 6.2L, Sierra 1500 Limited 2019 5.3L, Yukon 2014-2020 5.3L, Yukon XL 2015-2020 5.3L 6.2L; Compatible with Cadillac Escalade 2015-2020 6.2L, Escalade ESV 2015-2020 6.2L
  • [Reference Number]: 902-2090, 12674639, 12666569, 1511125
  • [Package Contents]: ①Bolt Hole Center To Bolt Hole Center: 3 in; 2.8 in; 2.8 in; ②Flange Length: 3.33 in; ③Flange Thickness: 0.4 in; ④Flange Width: 3.39 in; ⑤Grade Type: Regular; ⑥Inside Diameter: 1.06 in; ⑦Mounting Hole Quantity: 3; ⑧Thermostat Opening Temperature: 207 Deg
  • [Benefits]: We use quality materials and superb technology to ensure that the coolant thermostat housing assembly has high performance when it starts to work. With the featuring of corrosion resistance, durability, stability and long lifespan.
  • [Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted thermostat housing assembly. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind.



Product Description

USTHA34521

  • Compatible with Chevrolet Models:
  • 2014-2018 Silverado 1500
  • 2019-2019 Silverado 1500 LD
  • 2014-2014 Corvette
  • 2015-2020 Suburban
  • 2014-2020 Tahoe

  • Compatible with GMC Models:
  • 2014-2018 Sierra 1500
  • 2019-2019 Sierra 1500 Limited
  • 2014-2020 Yukon
  • 2015-2020 Yukon XL
  • Compatible with Cadillac Models:
  • 2015-2020 Escalade
  • 2015-2020 Escalade ESV
  • OEM Number: 902-2090, 12674639, 12666569, 1511125
  • Bolt Hole Center To Bolt Hole Center: 3 in; 2.8 in; 2.8 in
  • Thermostat Opening Temperature: 207 Deg
  • Thermostat Included: Yes
  • Flange Width: 3.39 in
  • Flange Thickness: 0.4 in
  • Flange Length: 3.33 in
  • Mounting Hole Quantity: 3
USTHA34521
USTHA34521
USTHA34521
USTHA34521

Bryan
2025-08-30 14:43:00
Fits perfect, well made, and better than plastic. I’ve had it in for 3 months now and no issues at all. No leaks, runs at the correct temperature in all temperatures and has not over heated at all. Well worth the money. Get rid of that plastic crap and upgrade to a metal housing.
DeeAngela Stovall
2025-07-09 13:09:20
I read reviews for other selected sites for this part and customers were not happy because it was plastic. This has a metal housing, if that is wht your looking for. I thought it would be plastic but it is surely metal. Great fit!
Scott's
2025-06-19 10:40:56
No way to clamp in place like OEM. Will be returning product.
Richard E. Romero
2025-06-16 18:41:32
It performs like a dealer part, but a lot less in price.
David loera
2025-05-20 11:08:45
Work for 2015 Chevy suburban
Luis G.
2025-05-05 12:53:14
Was expecting a plastic housing but ended up getting an aluminum. Was already skeptical bc the last one I ordered leaked from the smaller valve that threads on to the main piece, but no issues or leaks seen after install.There are some noticeable differences in quality of the thermostat components where the originals are more solid have more mass etc. Also had a metal ball lodged where the oring sits not sure where that came from but fortunately it came off.can't really complain for it being about 1/3 the cost of an oem one.
John Wilson
2025-04-04 16:50:05
Fits like a glove on my 2016 silverado 5.3l, and 1/3 the price of what auto zone charges for a plastic replacement.
Hern
2025-03-19 13:42:43
Fixed my 2014 gm 1500. The housing is metal, which I like!
Mario
2025-02-25 17:28:15
Works very well just like OE, which is also made in China, most likely in the same factory but at quadruple the price. This thermostat comparing to my original factory OE, is identical. Same spring tension, same plastic housing, inlet and overflow orifice is identical in diameter. 100% correct fit. Zero leaks, correct temperature, perfect fit. The only way these will leak, is because of improper installation, if the original seal is not removed from aluminum housing on the engine block, as the replacement seal is mounted in thermostat housing. Torque down bolts to only 7 ft lbs, and I would recommend a bit of blue thread lock.
Warren Mickels
2025-02-23 10:15:07
Not as described! pictures showed metal housing, but came with plastic like the lower priced units. Not worth the extra money!
Bj
2025-02-09 16:34:05
Said it was metal I paid for and they sent me plastic junk !
Charles R Noble
2025-01-25 12:58:54
Did not fit properly.
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