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#1
03-13-2010, 12:24 PM
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2002 Blazer 4.3L V6 Coolant Temp Sensor Location?
Hey Guys,
Just popped a code P0128 coolant temp below stat set temperature. Probably a t-stat issue but I think that the coolant temp sensor is only about $15 so I would like to replace it at the same time since the cooling system will be open. Does anybody know where to find the CTS on the 4.3L? Looked all over the intake manifold and around the t-stat housing and couldn't find it. Any help would be appreciated. Thanks, Sparky 
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#2
03-13-2010, 02:50 PM
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Re: 2002 Blazer 4.3L V6 Coolant Temp Sensor Location?
Quote:
You need to spend that 15$ for a good fail safe stat. That code is caused by engine not heating up as fast as it should. Is the engine warming up normal and as fast as it should and putting out good hot air? What is the running tempture on dash gage after 10 -15 minutes driving?
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Remember proper testing gives us the answer to many problems. MT
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#3
03-13-2010, 04:32 PM
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Re: 2002 Blazer 4.3L V6 Coolant Temp Sensor Location?
I show the engine coolant tempt sensor on left cylinder head between 2 rear spark plug.
__________________
Remember proper testing gives us the answer to many problems. MT
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#4
01-17-2011, 10:18 PM
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Re: 2002 Blazer 4.3L V6 Coolant Temp Sensor Location?
That's right, I just replaced my CTS on my 4.3l jimmy. It is located on the left head directly in the middle. you can't miss it. A little tough to get to but not bad. I have a question though, I went ahead and drained all the coolant out when I replaced it, was that necessary, or could you get away with doing it without draining all the coolant?
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#5
01-17-2011, 11:49 PM
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Re: 2002 Blazer 4.3L V6 Coolant Temp Sensor Location?
NO, you didn't have to drain all the coolant. I would probably not drain any of it, just took the sensor out and replace it quickly as I could trying not to lose as little as possible, them refill as necessary.
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Have a great day, Jerry 1992 Chevy S-10 Blazer 4 X 4, 4.3 W engine 3.42 gears 172,000 & still going Sold 2010 Toyota Tacoma Double Cab 4X4 V6 4.0 V6 DOHC 24V VVT-i 236HP Engine 12,000 plus miles Bought 10-22-11-2001 Toyota Camry LE SuperWhite 4 Door sedan I-4 89,680 miles
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#6
01-18-2011, 05:33 AM
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Re: 2002 Blazer 4.3L V6 Coolant Temp Sensor Location?
Quote:
There is Also another one for the VCM/PCM computer. No need to change or drain coolant with a tempt sensor replacement. But the coolant should be drained/flushed and replaced with dexcool ever 50K or 3 years. Instead if the GM /Dexcool instructions of 5-7 years / 100-150K
__________________
Remember proper testing gives us the answer to many problems. MT
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