Originally Posted by
dmaxmaverick
installing aftermarket equipment doesn't "void" any warranty (magnussen-moss act). However, installing aftermarket equipment may cause a denial of warranty coverage if the needed repair/correction is caused or affected by an aftermarket equipment installation, or modification of oem equipment.
who determines this?
if your too-frequent regeneration issue is due to excessive soot, the "cold air intake" may be related, somewhat, to the dealer and gm's handling of the issue. To start with, if may contribute to some of their skepticism. Many (most, probably) folks who add engine performance modifications don't usually stop at just an intake system. Meaning, to the dealer/gm, you probably also had some sort of fueling/power modification (whether you actually did or not).
no nothing else was changed. The stock intake was brought back to the dealer to be reinstalled if required to perform additional tests. The regeneration issues were seen prior to the installation of the after market cold air intake system in the middle of the summer last year. Bone stock still was causing frequent regeneration problems.
this means:
If you, or a previous owner, did actually install an electronic power device, or modify the system to provide more fuel/power, whether or not that was your initial intent, the expected result may be excessive soot, requiring more frequent regenerations. Result: Warranty denied, for that repair/complaint.
i am the original owner and i have never installed or modified the trucks system.
or,
the truck has never had any fueling modifications, but the dealer/gm assumes it does/did, supported by evidence of some sort (like other performance modifications, in their opinion). Result: Warranty denied, for that repair/complaint.
i have called 3 times to the dealer and left 3 messages and have made 1 call to customer care today to find out why work stopped on the vehicle and i have not had a response from anyone.
all that said, you may have, intentionally or otherwise, caused a warranty denial situation by installing the cold air intake system. These systems often do more than only allow cold air into the engine. The maf, temperature and pressure sensors are mounted to the air intake system, and rely on the airflow velocities and routing for accurate sensor data the pcm uses to determine fuel and injection timing maps. Modifying the oem air intake system, in almost any way, will have some affect on the airflow through the plumbing and into the engine. This alone may cause issues with fuel, timing and emission parameters. Restoring the intake to the oem configuration should correct this issue, but may take some time/miles to actually show a positive result.
again, it is documented in my service report that the vehcile had the problem with the original stock intake system on the vehicle before i looked into other options to improve mpg not performance.
another possibility, looking at it in the most simple way i can think of (and not heard mention of), is a leaking dpf fuel injector (not that a fuel injector would ever leak). This could cause excessive soot, and would likely cause more frequent regeneration.