1st diesel truck

Haven't noticed an issue such as that thus far on our 2017 GMC denali 2500HD which now has 14,500ish miles on 20 inch stock rims/tires....That mentioned at 11.8K miles we did call Good-Year tires directly to ask them for help warranting out the 2 front tires which they did help portion out at a prorated rate as the tires were wearing out unevenly...Mostly an feathering appearance to them...But while I'm unsure of this, I suspect some of the feathering might have been the dealer forgot to rotate the tires at the first free oil change of 2 services GM offers when buying the truck new though they mentioned they would/did....Happily Good Year worked with America's Tire for our replacement help.

? On the dual battery setup system of the diesel trucks....Is one battery more dominate than the other for certain/separate circuitry component features ? Or are they combined to handle it all ? Like with this question for example; One for the remote start system, lights, all defrosts or AC if hot out, etc... and the other handles normal start-ups with the key, dash circuitry and whatever else might be on that circuit + whatever's been left on by the driver switch wise.

While I didn't fully search all this out I quickly happen to run across the following linked site that offers a chart and good description down to the right of the chart that might be able to help you better as it seems pretty detailed regarding the towing mirrors.....https://www.shopgmcparts.com/trailering/2018-sierra-3500-trailering-mirror-harness-driverside-door/gm/84290984-p-7536.html While on the same website and clicking on a 17 2500HD trailering kit offers some info it seems, https://www.shopgmcparts.com/2017-sierra-2500hd/trailering-c-82_878_906.html Not sure if you've searched that site but if you can't find the info needed maybe it'd be worth a call. Hope this helps some, good luck.

Possibly you may have slightly bent one of the brake pedal actuating bracketry rotating arms during the traffic collision to where one of the brackets are now getting hung-up in the moving cycle at say certain odd foot pressing angles periodically. < If so then one thought may be the arm bracket that goes through the firewall to the brake booster assembly could be getting caught up someway like maybe on the walls edge for instance. Have you tried moving the powered adjustable pedal assembly to see if it helps change or solve the feel of the binding sensation? Also can you feel the binding sensation only while the engine is running or turned off as well?

Just went through code P0300 on an 2010 chrysler town and country van 4.0L with occasionally very intermittent P0306 popping up to start then eventually P0304 showed up roughly half a year later.....This took awhile to figure out as it did it mostly at idle but occasionally at higher RPM's too. I started off with new spark plugs which the old ones looked fine and one new coil for cylinder #6......Ran okay after that but you could still feel some roughness to the engine at idle mostly....Codes stopped for awhile then P0300 came back strong with intermittent P0304.... I now wish I did a cylinder compression test while the plugs where out but didn't think it was really needed suspecting injectors, sensors or coils, pcv valve, EGR valve which was replaced as it was questionable while rattling it and cheap enough while in there.......Cleaned throttle body, and all intake plenum related components....MAF sensor seemed okay so didn't mess with that too much plus with no codes for it was hoping for the best though it's on a big list of possibilities when thoroughly reading through this code online from different websites as the list kind of varies. Ran a bunch of fuel cleaners through it for fuel treatment and injectors, etc. as the van did at one point get a bad load of fuel from a high capacity chevron station. The exhaust smelt funny/odd too throughout the ordeal. Started to suspect injectors being dirty, low fuel flow, etc. and almost pulled them for inspection, cleaning or replacement if needed but held off because the van is still technically under chrysler lifetime warranty so cost wise wasn't worth it... yet. Also sort of suspected a possible voltage diode type problem say within the alternator as the headlights seem to slightly flicker during the issue of the code popping up after clearing. For the heck of it I temporarily tried a new alternator as it was easy enough to get too to no avail and all battery posts where clean and tight etc.. Though it took the dealer close to a month to find the issue; 'Cylinder # 4 and 6 where low on compression down to 105 psi while the rest where just over 175 if I recall them saying correctly.....Under warranty the van ended up with a new engine and it runs great now with no more rough idle, etc.. Moral of my story is you may as well perform the compression test and hope it's not it before going after the sensors, injectors etc. for code P0300. Let us know, good luck.

These videos should help get you started...^ Skip ahead to the 3:14 mark to see him pop of the lower cap. ... ... ... To see how the top cap comes off skip to 3:26ish mark.

While I do believe most of the newer trucks offer some sort of lock and unlock settings that you should be able to adjust for how you'd like the locks to work/activate in a general matter of design, Your description sounds about reverse of general design so most probable case is there is a program setting within one of the lock features of something I'll unofficially name 'Vehicle door lock control command modules' or maybecalled BCM (Body Control Module)... Please know this is just a guess/thought on my part but I'd have to believe a GM dealer would have to do a reprogram to one of the modules which is done through the main PCM system as a starting point. Does the issue seem intermittent or continuous? Below is some really good info of what the BCM controls as one of the lists is long.

Possibly the other same topic may open for you as an direct link....; http://www.gm-trucks.com/forums/topic/209824-2017-sierra-denali-rear-window-exploded/

The first following link is a must read for photo visual's of where to look for coolant leaks on the l5p engines, http://sandyblogs.com/techlink/?p=7510 http://www.duramaxforum.com/forum/l5p-tsb-service-bulletins-recalls-updates/893042-l5p-bulletins-recalls-updated-calibrations-3.html#post11062898

Just getting to 1,500 miles and the coolant message hasn't returned since they topped of the coolant and bled the system of air. From my perceptive (plus take notice the cold temperature gauge reading in enmity02 photo above) the coolant message may only come "on" when the engine is first turned on while still "cold" plus on ours, I did take note of about a 5 - 10 degree fluctuation while hot which went from normal 210 down to almost 200 then back up.... All of which is now gone since the coolant service.

Anyone else starting to get brakes that squeal on their 2017 2500 HD ??? Just started hearing them a bit over 1100 miles now. PS, @GM Customer Service, please check over and clear out some of your private messages as they seem to be at their max limit due to I keep receiving the following message while trying to send you a private message: Clearing either some or all of them would help allow new messages to come in.....Thanks.

Hi all, I just wanted to add something's to see if it may help others out with the low coolant concerns. Though the coolant level may not look low, it most likely is and there probably is an air pocket in the cooling system too...And it most likely left the factory like that... It took two tries for my dealer to look further into the situation regarding my same coolant level low message I had. Bought my 2017 GMC denali 2500 HD 6.6L on 5/6/17 and that night the coolant message came on....Brought the truck back the next day, service writer opened the coolant cap which turned off the message for two days and they/he didn't "see" the message on the dash or in the scan tool history. The first time around they did some inspecting, testing and I thought some air bleeding too but may not have at that time I'm suspecting now. Two days later while still cold in the morning, the message came back on....Got to work, shut it off and message went away while warm/hot.....I also noticed from the beginning my temp gauge would fluctuate 5 - 10 degrees at idle or RPM which typically helps indicate possibly some air in the system. But the first thought/consensus was we just all figured it's probably just a float type sensor moving with expansions from hot to cold, etc. and it would need a new sensor but they didn't just want to add a new sensor for no true reason until tested better. Let the dealer keep the truck a few days to check things over. Turns out GM is aware of this potential issue and "I believe" they may even have 2 types of written TSBs regarding this coolant message due to what my service tech wrote on my work order when I picked the truck up and so far no message on the dash. Below is a copy and paste of a TSB by a member on another board that is posting some copies of these TSB's for the new L5P engines...Search online, ( L5P TSB (service bulletins, recalls, updates) Postings of Tech Service info for any New L5P engine issues.) for other info such as this one 'And things like very high oil PSI while cold which is normal and nothing to worry about according to GM. My service tech wrote the following: Test drove 5 miles and no low coolant light on. Checked for TSB's and found 17-NA-110 for this exact concern. From factory they are under-filled, Allowed to cool down completely and added 1 quart. Got to operating temp as to bleed air pockets and fill surge tank. Allowed to cool again and rechecked coolant level. It was low a quart from air bleeding out. No leaks present anywhere under vehicle or see any signs of leaks. Just air pocket. Test drove and no lights came on. Notice the above TSB number 17-NA-110 and then below # PIP5487 which leads me to believe there may be two notices from GM on this. I'll let you know here if my coolant message comes back on anytime soon but I honestly don't think it will + I haven't really yet noticed as much of an coolant temperature fluctuation. The truck is getting ready to turn over to 500 miles soon but the first half of them seemed to be going back and forth to the dealer thus far. But that's okay because it gives more reasons to just drive this awesome truck.