Alright, took the truck in because of the rattles (under the steering column) the check engine light occassionaly comes on and I also hear a wheezing from the truck when sitting at a stop light and the truck is warm. Sounds like a compressor to me.

Well after having it for a couple of hours I get a call from the dealership. They let me know the air flow sensor is BAD. But they tell me because of the modifications (namely the cold air intake) they won't warranty it. For them to continue to look at the other items they will need to charge me a service charge.

Also the mass air flow sensor was 500+ labor ;)

Sound I'm wondering what can I tell the service manager, besides ****off? I am trying to remain civil after all.

Did you add a CAI or modify the stock stuff? Specifically, is the stock paper air filter still in it?

Never mind, I see "aFE Intake." in your sig. If that's an oil-based filter, you are probably screwed. If you ask them to prove what you did destroyed the part, they can just say the oil in the filter did it.

Ok but what about the rattles under the steering column.

I also asked them to update the tran/engine software. Which they won't without a charge now.

That they have to do. Check out the Magnusson-Moss act. It includes legal protection, that they cannot void your entire warranty, only deny warranty claims on parts that you may have broken.

Additionally, the "burden of proof" is on them. That is, THEY must prove that whatever you modified broke whatever's broken. Have them point out what you modified that made the steering column rattle. (hint: The steering rattle was not caused by the air filter change.)

Ask to speak with the service rep. Someone here had a great idea that you go get this in writing from them. Take a camera with you and take pictures of your car at the dealership.

If necessary, go pick up your truck and try a different dealer.

Sorry I know this sucks.

One more thought -- in your owner's manual, there's an 800 number for customer support. Ask them to explain why the dealer is denying your claim. The dealer hates getting calls from those folks.

The inconsistency between dealers is really infuriating to me. Some people are claiming the dealer installed a PPE tuner for them. Other dealers (mine) will do what yours is doing and deny warranty for trucks with tuners.

It's not fair man :)

Again sorry this sucks.

Yea I figured I was going to end up trying another dealer. It kind of stinks, if a dealership as honest with me and said "Hey Aaron, when you put the intake in you crushed the sensor".

I'd be o.k. with that. But I feel they just try to screw you every chance they get. Its really sad that its so hard to find a good dealer to just be honest with you!

Hell I'll buy the new sensor for $500+ but it sure in the heck will be from a different dealer!

Hell I'll buy the new sensor for $500+ but it sure in the heck will be from a different dealer!

That says it in a nutshell! :)

Also the mass air flow sensor was 500+ labor ;)

Sound I'm wondering what can I tell the service manager, besides ****** off? I am trying to remain civil after all.


200 bucks for the sensor, and 10 minutes to change it at MAXIMUM!:D

500 for a sensor and change - dang I'll sell you a sensor for that - go to gmpartsdirect and print off the price as it is this under powertrain control pricing

Mass air flow sensor, silverado, sierra, 6.6l 2007 $391.07 $203.36 MSRP is 391.07

Just take it off and clean it!

Just take it off and clean it!


OR, take it to another dealer and have them look at it. If they bitch about it, get the regional warranty rep involved, if its still a issue. Your choice, pay up OR Magnuson Moss Act...

Me being the ass I am and having alternate transportation, id choose to fight the "man"

Yeah My buddy is having the same prob.

Just take it off and clean it!

X2!!!

Carefully remove it, it is actually rather delicate. Spray the shit out of the sensor wires with carb cleaner and let air dry. Do it again. Reinstall and clear codes. I bet you don't have to spend a dime.

And then find another dealer.

AND THEN, when your GM customer satisfaction survey comes in the mail, fill it out with all the lowest scores, copy it, mail it in, and bring the copy in to show the dealer principal, not the service manager. Tell him why you just trashed his store and what they told you about denying warranty. My guess is that he goes thru the roof...

Ok but what about the rattles under the steering column.

I also asked them to update the tran/engine software. Which they won't without a charge now.

Just tell them to not worry about the check engine light and go ahead and fix the other stuff....

You can't ask for an update to your software. There needs to be a reason to do it....

It might not even be dirty it may just be the maf sensor settings need to be changed to acomidate tht filter jut like the k&NS s&B wont throw codes

I don't know if cleaning the MAF's will work or not but I'd use an electrical cleaner instead of spray carb cleaner. The latter may leave a trace residue where the electrical cleaner won't.

Alright, took the truck in because of the rattles (under the steering column) the check engine light occassionaly comes on and I also hear a wheezing from the truck when sitting at a stop light and the truck is warm. Sounds like a compressor to me.

Well after having it for a couple of hours I get a call from the dealership. They let me know the air flow sensor is BAD. But they tell me because of the modifications (namely the cold air intake) they won't warranty it. For them to continue to look at the other items they will need to charge me a service charge.

Also the mass air flow sensor was 500+ labor ;)

Sound I'm wondering what can I tell the service manager, besides ****** off? I am trying to remain civil after all.

FIGHT THE POWER! STICK IT TO THE DEALER!.......you got to love those responses
Now for reality.
From your post, it appears that the root cause of your MIL light is the MAF sensor.
Lets look at your signature
2007.5 4x4 Quad Cab Chevy 2500HD 6.6 Duramax w/ Alli Transmission (Transgo Jr-ed). 6" Fabtech w/ 35" Procomp Tires. Firestone Airbags. 4" MBRP DPF Back Exhaust. Edge Juice (BETA). aFE Intake. Titan 50G Tank. Line-X Bedliner. BW Removable Ball Hitch. Mag-Hytec Rear Differential Cover and Trans Pan. FS2500 Bypass Filter for Engine & Trani. Nicktane Fuel Filter Kit
It appears that you have modified the air intake system on this vehicle, so the dealer does have the right to deny warranty for the MAF sensor and since you have added a power up box, this can also be reason for the dealer refusing to warranty the MAF.
As far as the other repairs, those are questionable. I would continue to diagnose your other concerns until the point where I would suspect that a modification could cause it, then we would have to have a talk. (If it wasn't the modification, I would repair the concern under warranty no problem)
The service charge is probally for the time it took the tech to diagnose your MIL light concern.
As far as the reprogramming request. That is a no-go under warranty. If you want to pay, I would do it, but the dealer cannot reprogram the PCM and charge GM just because the customer requests it. There has to be justification (bulletin, repair procedure)
Remember, if you modify your vehicle, you must be ready to accept that your modification could cause you to be denied warranty coverage for that repair....I have seen it on here before, If you are going to play, you got to pay.

FIGHT THE POWER! STICK IT TO THE DEALER!.......you got to love those responses
Now for reality.
From your post, it appears that the root cause of your MIL light is the MAF sensor.
Lets look at your signature

It appears that you have modified the air intake system on this vehicle, so the dealer does have the right to deny warranty for the MAF sensor and since you have added a power up box, this can also be reason for the dealer refusing to warranty the MAF.
As far as the other repairs, those are questionable. I would continue to diagnose your other concerns until the point where I would suspect that a modification could cause it, then we would have to have a talk. (If it wasn't the modification, I would repair the concern under warranty no problem)
The service charge is probally for the time it took the tech to diagnose your MIL light concern.
As far as the reprogramming request. That is a no-go under warranty. If you want to pay, I would do it, but the dealer cannot reprogram the PCM and charge GM just because the customer requests it. There has to be justification (bulletin, repair procedure)
Remember, if you modify your vehicle, you must be ready to accept that your modification could cause you to be denied warranty coverage for that repair....I have seen it on here before, If you are going to play, you got to pay.

Well said!!

The MAF problem can easily be caused by the aftermarket CIA, programmer and/or exhaust. The steering rattle.....could be from the lift kit and you can't just demand an update. GM doesn't pay for updates or things that happened to your vehicle after you tampered with it. They pay for fixing a problem with their vehicles that's defective while within the alotted time frame while in stock form. Some get away with a few thing, some don't. You can try another dealer, but don't get mad if they deny you too.

If they find out you've 'Transgo Jr-ed' your tranny, that will no longer be warrentied either.

Pay to play

Well a diesel flows ungodly amounts of air and any oil on that filter stands a very good chance of landing on the MAF sensor. Seen it happen several times at our dealer and I know in one case we did warranty it only because the guy has always bought his trucks from us. He had some big bad looking filter that could have been ok had it not been dripping with oil. You may very well be able to clean it, its worth a try.

It appears that you have modified the air intake system on this vehicle, so the dealer does have the right to deny warranty for the MAF....

OK I get that part, since the oil on the sensor can screw it up.


....... and since you have added a power up box, this can also be reason for the dealer refusing to warranty the MAF.

And now I'm confused. Are you saying that if you install a tuner you are now in risk of damaging your MAF sensor?? What does it do to the sensor? I'm thinking of installing a tuner, but I don't want to mess up my MAF sensor.:rolleyes:

Mine rattled under the steering colum when new also. When I was running some RCA cables back to a new Amp I was installing, I happened to find the culprit. There was a bracket under the steering colum that was very loose. I am not sure what this bracket does, but it was held on (barely) by two nuts that were just finger tight. I tightened the nuts all the way up and the under dash rattle is gone. I just wrote it off to the truck being built at 5:00 on a Friday or something like that.

OK I get that part, since the oil on the sensor can screw it up.


And now I'm confused. Are you saying that if you install a tuner you are now in risk of damaging your MAF sensor?? What does it do to the sensor? I'm thinking of installing a tuner, but I don't want to mess up my MAF sensor.:rolleyes:

Lets look at your vehicle, 4" exhaust, K&N air filter and you want to install a tuner.
Any one of these modifications can cause MAF codes to set and therefore your modifications can be cause to deny warranty coverage.
The K&N air filter can oil the sensor and damage it. The filter and exhaust can cause airflow codes to be set.
The tuner...well lets leave it as I have seen so many wierd driveability problems with tuners that it gives me a headache.
What owners don't understand is that this system relies on every component doing a specific job, if you modify one component, that can cause problems with the other systems on the vehicle.
Remember that the factory warranty coverage is for "factory defects" not for defects caused by your modifications.

What I was asking is how is a tuner is going to damage the MAF sensor?

A person would think that the new gm diesel (lmm) is garbage by reading about all the problems. Then you find out by reading sigs that its a modified
truck. Maybe we need a modified lmm section or better yet modified duramax
section. My lmm is better than my lbz. lbz is better on fuel and both are stock
with 0 problems. My 04 never went to the dealer for problems. That is three
stock trucks right there, no problems.

A person would think that the new gm diesel (lmm) is garbage by reading about all the problems. Then you find out by reading sigs that its a modified
truck. Maybe we need a modified lmm section or better yet modified duramax
section. My lmm is better than my lbz. lbz is better on fuel and both are stock
with 0 problems. My 04 never went to the dealer for problems. That is three
stock trucks right there, no problems.

I think most serious readers of this site early on figure out that we're the nuts that analyze to death the operation of our vehicles, and our posts generally reflect that. I think it's pretty easy to figure out the overall tone here is very positive.

My understanding is that when you go for instance on the 6.0 Ford forums, its pretty easy to see people don't like their truck due to all the MAJOR problems

My .02

I know this is going to set off the " Oh you can't do THAT " people, but here goes anyway... Does anybody know which wires you need to jumper to simply bypass these frigging sensors? If my air filter plugs up I will notice a loss of power, It's just going to cause the air/ fuel mixture to be too rich, not going to lean it out and cause a melt down!
I've been having problems with this all winter, every time it gets cold the sensor freezes up, I take it out, thaw it out, clean it , dry it, put it back in. Works fine till next inopportune time to quit.