Question about 2004 Chevrolet Silverado 1500 Crew Cab

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Which 2 wires is The IAT on 2007 Silverado

Bought a chip and want to install it says to put it on IAT but there are 5 wires. Which is IAT which is Mass air flow?

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If it is a cheap $20 chip from e-bay, throw it away. You will be risking a lot while getting very little in return. The first guy to answer this is absolutely correct.

Posted on Jul 27, 2009

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Just so your aware. These are the the things they dont tell you on these products.
What will happen is you will run richer. You will wear out you catalytic converter alot quicker.. You will set off a service engine soon light indicating the cats needs replacement. You will fail a smog test with the ligh on. Itwill cost hundreds of dollars to fix.

Posted on Jul 22, 2009

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The intake air temp sensor is the one that is not the mass air flow. It should be a little 2 wire sensor in the inlet tube. The mass air flow is near the air cleaner, and is inline with the air inlet tube.

Posted on Jul 22, 2009

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If you are installing a so called "chip" don't do it, it can harm the engine due the changes it causes in fuel control as related to Intake Air Temperature and burn holes in the pistons. All that little part really is, is a $.50 (50 cent) resistor that you can buy from Radio Shack, it is smoke and mirrors and it also will void any warranty you may have. I for one strongly advise against installing it, it will make not difference in power and all there claims are just lies and falsehoods..

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The GForce Performance Chip has 2 wired (Black and Red) and the IAT Sensor has 5. Which 2 wired I need to used? My car is a Dodge Charger 2007 I appreciate Your answer


That is not a chip, it is a resistor in a fancy package. It cost about a dollar to make it. Jet also makes one. All it does is increase the resistance in your IAT circuit so that the PCM thinks the air coming in is colder than it actually is. Since most PCMs will add timing in colder air, you can get a bit of a perforance boost this way. The problem is, modern OBD 2 systems constantly checks itself and sensors. Since the PCM also reads a mass air flow sensor and an oxygen sensor, it eventually sees that there isn't as much air getting in as expected (since colder air is more dense) so it recalibrates the air temperture sensor thinking it is fautly. So, after a couple of days your 'chip' won't make any difference at all and in some cases it can actually cause the service engine light to come on. Also, the claims they make about these chips are unfounded and ridicuouls. Even a real chip or programmer can't expect more than a 15% gain. There is no way this IAT mod will add more than 3% and that will only be the first time you drive it. Try to get your money back and find a real chip or programmer for your car. If you are just bent on putting a resistor in your IAT wire, go get one from Radio Shack for a dollar and pocket the rest of the money.

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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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Bought cyclone performance chip for 2007 gmc sierra. it tells me to put the 2 prongs in the iat sensor holes. problem is there are 5 hole I could put it in on the plug. which two are the air intake sensor...


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

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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.

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