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    2012 Yukon Denali XL with 6L80 and 6.2L. Oil leak at rear of engine?

    I know the leak is not from the oil pressure sensor, the valve cover gaskets or the oil cooler gasket. All have been replaced less than 6 months ago and all have been inspected showing no leaking. As far as I know that leaves either the oil pan gasket, rear main seal or the rear cover gasket...
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    [SOLVED] 2012 6.2L Yukon Denali XL 172000 miles? Need help and cannot figure this very random problem out.

    Truck sits all night and get in to go to the store in the morning. Drive about two miles from home and engine is not fully at 210F yet with gas tank full. Stop at stop sign and turn left. Slowly accelerate but truck starts acting like it will shut off. Sort of like running out of gas as RPMs...
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    Does anyone have a complete list of all of the ground locations for a 2012 Yukon Denali XL with a 6.2L??

    I need to check all of the grounds. Does anyone have a complete list, video or guide to all of the grounds on this truck??
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    [SOLVED] 2012 Yukon Denali, between 10 to 15 mph the front end sways

    I can see the front end move while driving. Front end makes no noises while this happens. I have done no recent work to the suspension or tires. This happens while driving straight at 10mph to 15mph and is very noticeable like the front tire might come off. Once at higher speeds it does not do...
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    Truck stalled while leaving parking lot. What may have caused this?

    2012 Yukon Denali 6.2L 6L80E 171000 miles. I have been driving this truck for over a week with no problems at all. Wife drove it 40 miles one way with no problems. On her way back after driving about 10 miles she stopped at a store. She started the truck and backed out of the parking spot and...
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    What is the best scan tool for diagnosing automatic transmissions?

    I'm looking for the best bidirectional scan tool under $1000 that offers the best diagnosing for transmissions as well as everything else?
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    2007 - 2014 GMC 6.2L engine and 6L80E 6spd trans - random surging while accelerating at speeds under 45

    Looking for anyone else out there using this engine and transmission having similar problems. 170000 miles on mine. I have searched the internet and cannot find anything. This problem throws no codes or check engine and is random. For instance mine went 9 days without a problem and then one...
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    2012 Yukon 1500 XL Denali 6.2L while driving truck shudders, rpms run up and down until engine dies. Update at #44

    2012 Yukon 1500 XL Denali 6.2L. Truck shudders, RPMs run up and down until engine dies. I have been having issues with this truck for the last month or so. 170000 miles on it. First started with stalling and shutting off while driving and that's resolved (crank sensor). Then in park and at idle...
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    2012 Yukon Denali 1500 with 6.2. Truck sitting at idle in park and the engine just dies?

    This truck has been having idling issues and now is just shutting off. Today my wife drove this truck to FL and while waiting for my daughter at a doctor's appointment the truck just shutdown completely without warning. She is sitting there in park at idle with AC running and the truck just...
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    2012 Yukon XL Denali with 6.2 engine. Low oil pressure, low RPM in drive and idling.

    2012 Yukon XL Denali with 6.2 engine. Low oil pressure, low RPM in drive and idling. Truck engine shut off on my wife twice this week while driving. No check engine light and no DTCs at all. Engine cylinders not missing. No weird sounds. While sitting at idle in park the oil pressure was 10 to...
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    I want to delete or bypass the EVAP system in this 2012 Yukon Denali

    Sick of this EVAP system and want it gone or bypassed. Anyone already done it? I have been through the entire system and replaced all EVAP parts a few months ago and now I'm back to the pump shutting off again. I'm done with this and want it gone.
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    2012 Yukon Denali 6.2. Poor gas mileage, no codes thrown and no check engine light

    While sitting in the truck at idle I can watch the computer display "Average fuel mileage" it starts dropping while just sitting there. 1/4 tank of gas in it. The computer started at 8.2mpg which is low and in about 15 minutes the computer read 6.9 mpg. My wife is complaining that this truck is...
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    2012 Yukon Denali 6.2L 6spd transmission hard shift from 1-2. Shakes truck

    This is the stock transmission and nothing has ever been towed with this vehicle. Less than 200000 miles on it and never been off road as its a kid hauling grocery getter. Recently while on a trip to North GA I noticed while taking off from a dead stop the car shifted hard from 1st to second...
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    2012 Denali with 6.2 engine shutting off while driving. Random

    Two weeks ago my wife was driving this Yukon down the road at 45mph and the engine shutoff. She coasted to the side of the road. She shifted it to park and it immediately started back up and no problems the rest of the day. Earlier this week she got in the car in the morning and when she stopped...
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    I need to replace the fuel pump in my 2012 Yukon Denali with a Fuel System Control Module. I need to empty the gas tank?

    I need to drop the gas tank it's half full. I want to override the FSCM and pump the gas out using the fuel pump and the fuel rail valve. GMC decided to use a Fuel System Control Module and delete the fuel pump relay and fuse from the box. How do you remove the gas from the tank?

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