IAT SENSOR Out of the 5 wires on the iat sensor plug on a 2007 gmc 2500 hd what 2 control the iat. I have a performance module to install and dont know the 2 wires to hook to.

RTM


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this might be important for you to know
Quote:

08-08-49-002: False Triggering of Low Coolant Level Warning Message (Reprogram HVAC Control Module) - (Feb 13, 2008)

Subject:
False Triggering Of Low Coolant Level Warning Message (Reprogram HVAC Control Module)

Models:
2007-2008 Chevrolet Silverado 2500 and 3500 Heavy Duty Series Only
2007-2008 GMC Sierra 2500 and 3500 Heavy Duty Series Only
with 6.6L Diesel Engine (VIN 6 -- RPO LMM)

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Condition
Some customers may comment that a "COOLANT LEVEL LOW ADD COOLANT" message is displayed in the Driver Information Center (DIC) even though the coolant level is normal.

Cause
This condition may be caused by a false reading during off-road driving or in high slush conditions.

Correction
Do This - Reprogram the HVAC control module.
Don't Do This - Do not replace the coolant level sensor, HVAC control module or radiator surge tank.


A revised calibration has been developed to address this condition. Technicians are to reprogram the Heating Ventilation and Air Conditioning (HVAC) control module with the latest software available on TIS2WEB. Refer to the Service Programming System procedures in SI. As always make sure your Tech 2 is updated with the latest software version.


Warranty Information
For vehicles repaired under warranty, use:
Labor: Operation D4707
Description: HVAC Control Head Module or Assembly Reprogramming with SPS
Labor Time: Use Published Labor Operation Time

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.

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.


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

havent a clue on this one ,never seen a GMC sierra ,but i could tell you on a ford sierra .-sorry a totally useless reply ,only a suggestion but call the shop where you bought it they should know

Are you aware you can't really test this without the correct impedance meter You can ohm the sensor. But you will need to see how it responds while the car is warming up and you will need an laser to test for temp. I'm just letting you know that these newer computer in cars can be damaged easily with the wrong meter.
Good Luck

please rate as problem solved if this is what you need.



Section 03-14: Engine Controls, Electronic 1994 Mustang. Workshop Manual
REMOVAL AND INSTALLATION Intake Air Temperature (IAT) Sensor Removal and Installation

1. Disconnect battery ground cable (14301) .

1. Disconnect engine control sensor wiring (12A581) from intake air temperature sensor (IAT sensor) (12A697) .

1. Remove intake air temperature sensor from air cleaner outlet tube (9B659). (This is the tube that goes from the air cleaner to the engine.)

1. To install, reverse Removal procedure. Tighten intake air temperature sensor securely.

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the IAT should only be a 3 wire plug not 6

Those chips are not chips just a 5 cent resistor to alter the IAT (Intake Air Temperature) signal to the PCM (Powertrain Control Module), the idea is that the engine control computer thinks it is getting colder air than it really is and slightly increases spark advance, u will feel no difference in power but u may gain 1 MPG in fuel economy, so u decide. One last note they are illegal in most states that do emission tests, it alters the factory controls.

Well, the IAT (Intake Air Temperature) sensor is located on the air intake duct between the filter and the throttle body (Assuming you have the 6L motor). The wires are easily visible at the plug that connects the sensor to the wiring harness. That's the easiest place to access them.