Question about 2006 Chevrolet Colorado

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Need to replace thermostat

Chevrolet Colorado z71 4x4

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Thermostats on I-4 and I-5 Colorado's are very straight forward, the thermostat and the housing are a single unit. Thermostat housing is sealed by a rubber seal and is held on to block by two bolts. Procedure is as follows

1.drain cold coolant by removing radiator cap and using radiator drain petcock.

2. disconnect top hose from thermostat

3. unbolt thermostat housing.

4. install new housing, be careful to not overtorque, block is aluminum

5. connect top hose and close drain petcock

6. refill with new coolant and close radiator cap

7. start engine and check for leaks.

8. if no leaks are detected, allow engine to reach operating temperature. shutdown and allow to cool completely, verify that coolant level is correct.

Posted on Nov 14, 2012


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Posted on Jan 02, 2017


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2005 Colorado Z 71 LS 4X4 shows codes B0899, U1026, U 1064, P 0128, P 0442. What needs fixing?

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