How to replace the engine coolant thermostat (LU3) on 2007 GMC Sierra 1500?

To change the engine coolant thermostat (LU3), disassemble the water outlet tube, water outlet and the thermostat. Wipe the sealing areas and dispose the O-ring seal. Installation of a new O-ring on the thermostat, then the thermostat, then the water outlet, and lastly the water outlet tube.

OEM 2007 GMC Sierra 1500 Thermostat

Engine Coolant Thermostat

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2 Thermostats found

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2007 GMC Sierra 1500 Thermostat Part Number: 89018168
$36.41 MSRP: $72.25
You Save: $35.84 (50%)
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Product Specifications
- Other Name: Engine Coolant Thermostat; Thermostat, Engine Coolant Temperature
- Replaces: 89017851
- Item Weight: 0.60 Pounds
- Item Dimensions: 3.6 x 2.6 x 2.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 89018168
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2007 GMC Sierra 1500 Submodels:
- AT4, AT4X, Base, Denali, Denali Ultimate, Elevation, Hybrid, Pro, SL, SLE, SLT, WT, XFE | 6 Cyl 4.3 L GAS, 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
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2007 GMC Sierra 1500 Thermostat Part Number: 12632948
$29.83 MSRP: $56.02
You Save: $26.19 (47%)
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
- Replaces: 12257859, 12563335, 12557859, 12597583, 12551472
- Item Weight: 1.30 Pounds
- Item Dimensions: 3.0 x 3.1 x 3.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12632948
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2007 GMC Sierra 1500 Submodels:
- Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS

2007 GMC Sierra 1500 Thermostat

With a comprehensive array of OEM 2007 GMC Sierra 1500 Thermostat, from fuel pumps to door handles, our website is a one-stop-shop for your needs. All our genuine 2007 GMC Sierra 1500 Thermostat are backed by the manufacturer's warranty and are offered at competitive prices in the market. Rest assured, you can shop with complete confidence.

2007 GMC Sierra 1500 Thermostat Parts and Q&A

Q: How to replace the engine coolant thermostat (LU3) on 2007 GMC Sierra 1500?
A: To change the engine coolant thermostat (LU3), disassemble the water outlet tube, water outlet and the thermostat. Wipe the sealing areas and dispose the O-ring seal. Installation of a new O-ring on the thermostat, then the thermostat, then the water outlet, and lastly the water outlet tube.