How to check and replace a thermostat in a cooling system on Chevrolet Avalanche,Silverado,Suburban,Tahoe,GMC Sierra,Yukon,Yukon Denali and Yukon XL?

Before assuming the thermostat is to blame for a cooling system problem, it is important to check the coolant level, drive belt tension, and temperature gauge (or light) operation. To remove and install the thermostat, follow the steps for either the V6 or V8 model. Also, clean the mating surfaces, install a new rubber O-ring around the thermostat, and check and replace hoses and clamps as necessary. Installation is the reverse of the removal. After installation, refill the cooling system, run the engine, and check carefully for leaks.

Genuine Chevrolet Avalanche Thermostat

Engine Coolant Thermostat

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3 Thermostats found

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Chevrolet Avalanche Thermostat Kit,Engine Coolant
Part Number: 89018168
- Other Name: THERMOSTAT KIT, Engine Coolant Temperature; Thermostat
- Replaces: 89017851
$36.27 MSRP: $73.55
You Save: $37.28 (51%)

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Fits the following Vehicles:
2007-2013 Chevrolet Avalanche | 1/2 TON | 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L
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Chevrolet Avalanche Thermostat,Engine Coolant
Part Number: 12600171
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat, Thermostat Unit
- Replaces: 12581595
$20.88 MSRP: $39.42
You Save: $18.54 (48%)

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Fits the following Vehicles:
2004-2006 Chevrolet Avalanche | 1/2 TON | 8 Cyl 5.3L, 8 Cyl 5.3L Flex
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Chevrolet Avalanche Thermostat,Engine Coolant
Part Number: 12559575
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Replaces: 12559573, 10210450, 12559269
$17.44 MSRP: $32.90
You Save: $15.46 (47%)

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More Info
Fits the following Vehicles:
2002-2006 Chevrolet Avalanche | 3/4 TON | 8 Cyl 8.1L
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Chevrolet Avalanche Thermostat Parts Questions & Answers

Thermostat Kit,Engine Coolant
89018168
Q: How to check and replace a thermostat in a cooling system on Chevrolet Avalanche,Silverado,Suburban,Tahoe,GMC Sierra,Yukon,Yukon Denali and Yukon XL?
A: Before assuming the thermostat is to blame for a cooling system problem, it is important to check the coolant level, drive belt tension, and temperature gauge (or light) operation. To remove and install the thermostat, follow the steps for either the V6 or V8 model. Also, clean the mating surfaces, install a new rubber O-ring around the thermostat, and check and replace hoses and clamps as necessary. Installation is the reverse of the removal. After installation, refill the cooling system, run the engine, and check carefully for leaks.