Question about GMC Sierra 1500HD

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Wiring diagram for my 2003 GMC Sierra 1500 HD it has 5 wires at the IAT MAF .

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Black wire is the 5 volt reference from PCM to IAT. Tan is IAT data signal to PCM. See diagram below.

wiring diagram for my 2003 - c0f7422.gif

Posted on Oct 31, 2010

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For a 2005 GMC yukon 5.3L what are the wire colors that control the IAT sensor There should only be 2 wires controlling it but there are 5 on the connection as it controls the MAF and IAT with the sa


The intake air temp sensor is part of the MAF sensor so yes there are 5 wires.
The two wires that go to the air temp sensor are tan and black. The other three are for the MAF.

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2007 GMC 2500HD. TRYING TO FIND WHERE THE IAT SENSOR IS LOCATED. Is this on the lower left side of your truck under the hood. Does this have a 5 wire plug into the MAF?


Hello mahnkes.

You did not mention what engine you have.
I have based this reply on a 6.0 liter gasoline engine.

The IAT (intake air temperature) is integral with the MAF that is mounted in the intake duct and if defective will need to be replaced as an assembly.
#2 in the diagram below.

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I hope this helps you along.
Let me know if your engine isn't the 6.0

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what do you mean by control? there is one wire normally pink or white with pink strip that is power 5 volts + black is ground and a reference voltage 5 volts ground is black or white so the other two colors would be the control wires going to the computer. However would need the first 8 numbers of the Vin to know for sure. you can also go to www.alldatadiy.com and purchase a subscription that will give you the exact information you need, they change color codes for wires from time to time and if you hook it up wrong you can destroy the computer so I suggest you purchase the subscription to be sure.

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2003 GMC SIERRA K2500 HD


buy a clintons repair manual at a auto store they will have a complet break down on wiring, plus so much more its worth the $20

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