6.2L (L9H) Owners - Get all your questions answered here

[EX-F150 owner]

So I'm thinking about putting the autocal in my 2013 Chevrolet 1500 it still has warranty and according to the guy I been emailing He says it won't leave a footprint in the computer so if I have to have warranty work done I just return it to stock and they wouldn't know I had a tune in it is this true or not

If you are concerned about voiding your warranty I would advise against it until it expires. What if you tuck breaks down on you and you're not able to return the factory program before getting it serviced. Anything can happen.

[Bodean10]

Im getting 10mpg !

[RyanbabZ71]

I got that beat, been around 9-9.5 here with E85, 4wd and remote starts in the freezing temps

[Caleb 6R]

So i've been doing some research but i can't quite get a solid answer. 2013 GMC Sierra All-Terrain 6.2L loaded, with bose, does it have a sub woofer?

[EX-F150 owner]

So i've been doing some research but i can't quite get a solid answer. 2013 GMC Sierra All-Terrain 6.2L loaded, with bose, does it have a sub woofer?

Why would the BOSE in it be any different than mine? Does it have a center console? If so it is in there.

[SILVERADOSC540]

So i've been doing some research but i can't quite get a solid answer. 2013 GMC Sierra All-Terrain 6.2L loaded, with bose, does it have a sub woofer?

Yes.

[Caleb 6R]

thanks fellas, any idea of the size? 10"

[Chris]

thanks fellas, any idea of the size? 10"

Its a 6" I believe

[401 YJ]

I know we have moved on from this but I too am having trouble with cold starts. The difference is I don't even have a block heater. My truck is garaged but the garage is not heated. Usually doesn't get below 20F. Truck will start run like garbage for a minute then die. When I start it the second time it still runs terrible and dies a second time. By the third time it will finally keep running. I am also have service lights coming on but nothing to do with the motor or emissions. So far it has been the service traction control and service trailer brake control. Last time I took it to the dealer for running poorly it was late summer and they said it was because I have over sized tires which are only 275's which is an option, and I did have an aftermarket K&N cold air intake which I have removed. Truck has 12,000 miles. Just checking to see if anyone else is having similar issues.

[EX-F150 owner]

Tires causing it to run bad Have you tried a different dealer.

[401 YJ]

I blew off the tire thing. I can kind of see the oil soaked filter causing problems. It goes there Monday so I will see what they say.

[Wolfmanjohn]

I can kind of see the oil soaked filter causing problems.

 

Yeah, oil deposits play hell with the MAF. Had a K&N filter in my '04 'Vette for 3 months, during which time it pinged horribly and overall ran like shit. That was my first and last non OEM air filter.

[401 YJ]

Got the truck back yesterday. I didn't realize how bad it really was running until I pulled out of the dealership. It has a lot more get up now. Dealer wanted to know if I have been running E85. I have never put anything lower then 91 octane with no more the 10% ethanol. Turns out the computer was reading the fuel at 75% ethanol. Reflashed the computer and all is fine for now.

[Stex]

Got the truck back yesterday. I didn't realize how bad it really was running until I pulled out of the dealership. It has a lot more get up now. Dealer wanted to know if I have been running E85. I have never put anything lower then 91 octane with no more the 10% ethanol. Turns out the computer was reading the fuel at 75% ethanol. Reflashed the computer and all is fine for now.

 

Did you tell them they forgot to fix the tires? Two trips because they where too indifferent to check it out the first time.

[txmuder]

Having my 2012 CC regeared from 3.42 to 4.10, excited to see the performance differences. Has anyone else had this done, and if so what differences other than slight loss in mpg have you experienced?

Edited February 7, 2014 by txmuder