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Coolant Temp Sensor Pigtail ID

This is a discussion on Coolant Temp Sensor Pigtail ID within the Technical / Maintenance forums, part of the General Discussion category; First off it's a 95 Chevy K1500 TBI 350 that was rebuilt by the previous owner. I went to buy ...

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    Coolant Temp Sensor Pigtail ID


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    First off it's a 95 Chevy K1500 TBI 350 that was rebuilt by the previous owner. I went to buy a coolant temp sensor and all of the parts stores have sensors that are 2 wire pigtails.

    The one on my truck is a one wire and looks like this:


    The one all the parts stores have looks like this:


    What's going on? Why would mine only be one wire? They checked 95-99 and the different engine sizes and all of them list the same part number as well.
    Last edited by flip124; 05-15-2010 at 03:36 PM.

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    Re: Coolant Temp Sensor Pigtail ID

    OE sensors were mostly 1-wire and relied on the shell of the sensor for their ground. Most of the new ones in the store should come with the 2-wire pigtail.

    The 2nd wire just goes to ground.

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    Re: Coolant Temp Sensor Pigtail ID

    The CTS has a black & yellow wires and the sensor is in the intake manifold by the thermostat. The Gauge sensor is on the cylinder head between the #1 & #3 cylinders. Your pic shows the Gauge sensor wire connector.
    04 K1500 Silverado EXT 3:73 gears, 5.3L 265/75-16,Pace Edwards tonneau,

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    Re: Coolant Temp Sensor Pigtail ID

    Quote Originally Posted by redvett01 View Post
    The CTS has a black & yellow wires and the sensor is in the intake manifold by the thermostat. The Gauge sensor is on the cylinder head between the #1 & #3 cylinders. Your pic shows the Gauge sensor wire connector.
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    Registered User SnakeOiler's Avatar
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    Re: Coolant Temp Sensor Pigtail ID

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    Re: Coolant Temp Sensor Pigtail ID

    yeah, it looks to me like your trying to find the temp. SENDER pigtail. The pigtails that your finding are for the temp. SENSOR. It sounds stupid, but for some reason Chevy decided we needed two different types of temperature sensors on these trucks.
    95 GMC 1500 ECSB 350 TBI 4L60E- 4" front, 3.5" rear, 31x10.50s, 3.42, Flowmaster 40 exhaust, injector spacer, CAI (SOLD)
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    Re: Coolant Temp Sensor Pigtail ID

    how do you get a new temperature gauge sender? i have the same problem the OP did. if you go to autozone and ask for a temp SENDER not a temp SENSOR would they get you the right one?

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    Registered User ChrisAU's Avatar
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    Re: Coolant Temp Sensor Pigtail ID

    Just pull it out the box at the parts store and find which one you need by the pin setup. Thats how I had to find mine, the parts store didn't differentiate between the two as far as category.

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    Re: Coolant Temp Sensor Pigtail ID

    Quote Originally Posted by bbgot View Post
    yeah, it looks to me like your trying to find the temp. SENDER pigtail. The pigtails that your finding are for the temp. SENSOR. It sounds stupid, but for some reason Chevy decided we needed two different types of temperature sensors on these trucks.
    GM did not go to serial data on the GMT400 truck and thats why you have a CTS and a Guage sender. GMT800 trucks went to serial data and eliminated the guage sender.
    04 K1500 Silverado EXT 3:73 gears, 5.3L 265/75-16,Pace Edwards tonneau,

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    Re: Coolant Temp Sensor Pigtail ID

    Can I use the two plug pigtail on the one plug sensor and just clip the second wire?

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    Re: Coolant Temp Sensor Pigtail ID

    No

    Quote Originally Posted by gutt1189 View Post
    can i use the two plug pigtail on the one plug sensor and just clip the second wire?
    04 K1500 Silverado EXT 3:73 gears, 5.3L 265/75-16,Pace Edwards tonneau,

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    Re: Coolant Temp Sensor Pigtail ID

    Quote Originally Posted by redvett01 View Post
    No
    Why is that being that the only difference in the two is the two prongs extra wire is a ground and the other uses the motor. The side ways prong on the on wire prong is strictly a guide

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    Registered User burt's Avatar
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    Re: Coolant Temp Sensor Pigtail ID

    Quote Originally Posted by Gutt1189 View Post
    Why is that being that the only difference in the two is the two prongs extra wire is a ground and the other uses the motor. The side ways prong on the on wire prong is strictly a guide
    The Ohm ranges are different for the computer sensor vs the guage sender.

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