aragrev7

Very nice! I’m new to the lifting scene. My previous vehicles were Japanese imports, so We always when the other direction. The leveling kit, what’s the benefit for you? Our AT4’s have a 2” at least lift I know. The back end is up a bit to compensate for load (?). I can do research on it too, but I prefer conversation : ) I keep seeing it, just forget to look into it on breaks. Sent from my iPhone using Tapatalk Pro

I have some insight for a bit of a different setup. I’ve tried both magnaflow (installed ~2 months ago) and now flowmaster (swapped yesterday) cans on the 2020 Sierra AT4 5.3L. Full dual exhaust from front to back straight off the headers. Sounds great start up on both. But once idling, it’s too quiet. If that’s a thing. I mean I paid for a growl, and it’s there, but it sounds stock at idle. With this 10 speed, any cruising or stable speed, it’s also too quiet for what I was expecting. I’ll have to break this one in a bit. I was expecting something like Borla s-type sound out of the flowmaster, but it’s definitely under that. My Acura was louder at start up and idle by far, and that was Apex’i Touring, nothing like the massive Greddy exhausts others were using. I’ll see if I can get you a clip of the flowmasters. Sent from my iPhone using Tapatalk Pro

Here’s the link to the manufacture I used. I got the 6 3/4” for a 2020 Sierra 1500. https://www.theantennasource.com/GMC/SIERRAPICKUP/Sierra2020-1500.html Sent from my iPhone using Tapatalk Pro

2020 AT4 5.3L 10sp - Pacific Blue Engine bolt-ons: - Volant Cold Air Intake with PowerCore filter & Pre-filter. - Custom True Dual Exhaust (separate pipes from headers to tips). Exterior: - Black textured Putco Bed Rails. - Black Horse Off Road Armour Bull Bar (custom fit / park sensor rewire). - Extang Xceed Tonneau Cover (Hard / 4 Panel). - Lund Aeroskin II Hood Deflector - Textured Black Finish. - Lund Low Profile Window Deflector - Smoke finish. - Undercover Swing Case (Passenger). - Custom designed Canadian Logos (Black / Red) - Carbon Fiber Vinyl wrapped front logo. - GMC logo hitch receiver plug. - GMC logo Aluminum valve caps. - GMC Cargo Net. - Flat Step Rails (Black / Textured). - 6.5” Stubby Antenna - Blind Spot mirrors (side mirrors, rear view) Tech: - Pedal Commander - BlackVue Front & Rear Dash Cam - Shock/GPS/Parking mode/cloud. Interior: - 35% Nano-Carbon Ceramic Window Tint - 5% Nank-Carbon Ceramic Windshield Brow Tint. - centre console tray & dividers. - Baby seats & Skullvibe molle seat protectors : D. Sent from my iPhone using Tapatalk Pro

I missed my chance! They were for sale locally with TPMS sensors. But the price got them scooped up too quick! I’ve seen an AT4 driving around with them though. Trying to track him down and chat! Sent from my iPhone using Tapatalk Pro

I’ve definitely encountered this. Also, in Canada, on the Acura/ Honda side, despite the US company having tech bulletins & recalls for issues, we often don’t get them right away, so despite having the problem with a clear link to the TSB, I’ve been turned away until I produce the docs myself (and even then) or spend the time arguing for it. - dealer: “we don’t have access to US tech database - they don’t share their info with us” - ok here it is. : ) Sent from my iPhone using Tapatalk Pro

I ended up going with a custom shop. Did true dual exhaust from headers to tips. X-pipe to deal with V4 sound issues. Probably acts as a resonator. Sound is very manageable, but growls at throttle and start. I almost want to get a bit more sound out of it, but that’s coming from noisy import life. I do notice a bit of drone at highway speeds though, so I’m going back to try and sort it out. It just came out much cheaper than a borla, and I expect better performance not having to share the piping. Sent from my iPhone using Tapatalk Pro

Next up is to black out the exhaust tips, and look into wheels possibly. Anyone know if we can go 10” wide with the stock tires? Most stores just show the standard 9” wide. Wonder if there is rubbing? 20” x 10” Offset -18 Eye on a set of Fuel Covert D695. Red/black Sent from my iPhone using Tapatalk Pro

New badges! Updated with some custom badges with a little Canadian signature . AT4s, removed GMC. Added 5.3 & V8. And forgot to post the custom True Dual exhaust, flowmaster cans. Sent from my iPhone using Tapatalk Pro

Quick update - I added the outcomes to the noted problems for future searchers. Also added a new issue. 6. Driver Mirror Vibration - There is quite a bit of driver mirror vibration at speed. It appears that wind is catching the mirror. This does not happen with the passenger mirror. There is so much vibration at times that the mirror is unusable for clarity, only that I have a vehicle with headlights madly dancing on the road behind me. The vibration is audible through the window that parts are contacting. * so far dealer stated the tested out several 2020 sierras and this is a similar issue. To them this was a solution. Is this the same with others on 2020 Sierras???

Thanks! The itch is well imbedded : ). Coming from my imports, I’ve basically stripped down the frame and DIY’d it back up the way I want. Lots of learning, mistakes, and triumphs. Trying to be a bit more tame on this, since it’s brand new. Sent from my iPhone using Tapatalk Pro

It really is far more than a night and day difference. It makes the stock pedal feel incredibly sluggish. Even on the city mode which is what I use. The closest analogy I can feel is going from a 250cc bike to a 1000cc. Just more go on the bottom end. Going back to stock, it’s one of those rock in your seat-c’mon let’s get going-feeling. Hard to go back. But basically just need to step on the pedal more to kick in. There is just no delay on it with the PC. Sport+ mode is just ridiculous. I could only see that being used for track racing. It’ll easily chirp tires or burnout with traction control off. City driving: As for fuel economy, I’m getting better mileage on city mode vs stock by 1-3 L/100km. And worse mileage on eco mode than stock by a similar amount (eco is most likely meant for highway not city). Testing is running through a whole tank on the mode (remembers what you picked at start up). I can say eco mode for a full tank was a test of my fortitude. Sent from my iPhone using Tapatalk Pro

Maybe I’m odd, but seems like a personal conversation to me. Realistically, if you’re out in AB, the dealer isn’t going to care much about what pricing looks like in MB. Too many variables, like number of local units available, how long they’ve sat on the lot, if they’re pulling it in from another lot, sales starvation vs high demand, yours/their negotiation skills : D I’ll shoot you a pm for what I was able to shave off the sticker price. Sent from my iPhone using Tapatalk Pro

Mods so far: - Pedal Commander - BlackVue Front & Rear Dash Cam - Shock/GPS/Parking mode/cloud. - Volant Cold Air Intake with PowerCore filter & Pre-filter. - Lund Aeroskin II Hood Deflector - Textured Black Finish. - Lund Low Profile Window Deflector - Smoke finish. - Extang Xceed Tonneau Cover (Hard / 4 Panel). - Putco Bed Rails - Black / Textured. - Undercover Swing Case (Passenger). - GMC Cargo Net. - Flat Step Rails (Black / Textured). - 35% Nano-Carbon Ceramic Window Tint - 6.5” Stubby Antenna Fun accessories: - centre console tray. - visor storage. - GMC logo hitch receiver plug. - GMC logo Aluminum valve caps. - Black Carbon Fiber Wrapped Logos. - Blind Spot mirrors (side mirrors, rear view). Planned mods: - Custom True Dual Exhaust - (Y-pipe delete, X-pipe to manage eco mode tone). - blackout chrome badges. - Black Textured Push Bar - 5% Brow Tint. - Black Rims - DIY Rearview Mirror Display/Camera mod. Sent from my iPhone using Tapatalk Pro

Worked! Thanks again. I’ll have to let the dealership know because according to them, GMC is stumped about it too. Now it makes sense! Sent from my iPhone using Tapatalk Pro

Oh my, if you are right, you’re a hero! But also still helpful regardless for chiming in! Sent from my iPhone using Tapatalk Pro

Thanks for the input! Yes this works (tried before), and as long as I have the key far enough from inside that it doesn’t think I’m locking the key inside I believe. However, I’m not looking for a work-around, I’m trying to determine if the truck is working right (I don’t think it is), it’s only a few weeks old. On top of that, when I pull my kid out of the backseat (or tools, etc), this means I then have to then open the front door again to lock all the doors, or leave it open and come back to it (or press the button three times). I know it’s seems picky, but when I buy a vehicle, I test everything out, all features, drive mostly without radio or music (except to test) to hear the vehicle and listen to its “normal”, so I can identify when something breaks, needs attention, or is not functioning the way it should. Sent from my iPhone using Tapatalk Pro

Hi All, 2020 GMC Sierra 1500 AT4 5.3L with “premium package” (Sun roof, wireless charger, 20” rims etc). I’ve been running into some electrical issues. My dealer is a 45min drive away, and I’ve been there several times with little result. Regularly it seems like I know more about my truck than they do, which is not uncommon with most dealerships I’ve dealt with. To be fair, I do research on my specific model, and they have to have a bit of knowledge on all GMC, Chevy, etc. I’ve been to the dealership 4-5 times in 6 weeks. 1. Seat memory (clarification): - Do the seats return to memory of the Key fob (1 &2) when the door is unlocked and opened? Or only at start? Every vehicle I’ve had/used (Acura, Honda, Nissan, subaru, Audi, VW, etc) always returned to position from my wife’s spot to my own at door open. (I’ve looked through the menus (DIC, main screen), haven’t found a setting to change between door open or driver start). *Dealer just printed out a guide on how to set the seats. It SEEMS like only on ignition on - this may be due to the “exit memory” but even turned off there is no Change. SOLVED: Seat adjustment only occurs at ignition start. Not at door unlock or door open. Setting door exit position to my (Driver 1) seat arrangement means the seat will be ready for me after my wife steps out. 2. Navigation SD card. - I turn the truck on, it tells me that “once the as card is initialized with the vehicle, it cannot be changed” - press ok. Except this pops up each and every time I start the truck. Just initialize already!!? It won’t progress past this until I press ok. Added to that, the navi will randomly tell me the SD card as been removed (when it has not been touched) and won’t work again until I restart the truck. Is this an issue with all 2020 Navi’s? * Dealer claims they “think” they tried swapping out the memory card and no change. I asked again later at a subsequent visit and they said they would have to order a new one in to do that (Ok, please do that?). Then they said GMC Canada is aware and looking into a fix. Any solutions for others? GM- T FORUM MEMBER SOLVED: SD card switch was toggled to the “Read Only” position. Changed to “Read/Write” to allow system to Initialize card. 3. Door lock loop. - the truck has settings to choose door lock and unlock modes. Due to my work, I end up in unsafe locations where I require my doors to remained lock when I shift to park, and also only my driver door to unlock when I approach the vehicle. This has already prevented me from unwanted individuals trying to jump in at the same time or unknown people trying enter the vehicle when I pull over and park. My issue is, no matter what, when I get out of the vehicle after driving, close the door. When I press the handle door lock, I have to cycle through A) driver door unlock (it’s already unlocked, i just got out). B ) all doors unlock. C) all doors lock. This is annoying and unsafe as I have to stand there pressing the door button three times slowly to lock, and if I press to quick I miss and leave all doors open. Tinted windows mean I have to press my face against to see. (Yes I can take my fob out of my backpack or pocket and press lock - but why did I pay for the system then?). Again, all the other vehicles allow me to lock the doors immediately with a button press when I exit - no hassle. (And unlock with the touch of the door handle - Sierra apparently didn’t pick up on this feature?). *Is this normal? (It can’t be, it’s ridiculous) Dealership told me they fixed the issue (they did not). Then later told me they are ordering some part that might be holding down some other thing. I asked for a real explanation from the tech, but he was busy. Asked for a call, no call back. DEALER CONCLUSION: If door is manually opened from the interior using handle (pull twice: unlock, open door) then the Body Control Module (BCM) does not receive a signal and believes the door remains locked, despite the door opening and the key being detected transitioning from interior to exterior. Pressing the button initiates the lock sequence from a locked state despite the door being in the unlocked state. "The system is just not as smart as others." 4. Door delay lock. - following the above. I decided to use the “delayed door lock” feature to ensure I wasn’t leaving the door unlocked. This feature locks the doors after a few seconds of the key leaving. However it got annoying quick as unless I run around to the other side to get my kid out, it locks the doors. Then, for camping it’s very annoying. I turned off setting under my and my wife’s profiles. However, it won’t turn off. No matter what. Anyone run into this? Haven’t told the dealer yet as they don’t seem to know and are waiting on a part to schedule me back in. For the 4-5 time I. Just over a 6 weeks. SOLVED: Dealer kept changing lock settings to "delayed door lock" thinking they were providing a alternative solution for locking the truck on exit without informing me. I would turn it off and each time I brought it in for the above loop, they were turning it back on if I had turned it off. 5. Parking assist. - I noticed that while driving, my rear parking assist and cross traffic alert randomly disable. There is no sound and I only catch it when I see the message pop up briefly on the DIC. I assume it’s related to the dealer replacing the rear bumper prior to me buying the truck following some mishap that scratched/dented the bumper. DEALER SUGGESTION: Can't replicate. Will not unplug or interfere with current setup in hopes that it will cascade into a larger detectable error. Claimed that if they tried unplugging and re-seating the connectors it may "reset" the problem to an earlier undetectable state. If it happens again "please bring it to a closer dealer to review". ...implied it's a lot of work to remove the parts to get at the connectors and not worth the trouble to open up, but please make it someone else's problem : ) 6. Driver Mirror Vibration - There is quite a bit of driver mirror vibration at speed. It appears that wind is catching the mirror. This does not happen with the passenger mirror. There is so much vibration at times that the mirror is unusable for clarity, only that I have a vehicle with headlights madly dancing on the road behind me. 1st Dealer Suggestion: so far dealer stated the tested out several 2020 sierras and this is a similar issue. To them this was a solution. 2nd opinion Dealer Suggestion:Took the issue to a different dealer. They advised to replace the mirror assembly. Determined that the mechanical pivot point is faulty. Sorry for the length. I just need help from some knowledgeable owners that can help out. Details are helpful! Sent from my iPhone using Tapatalk Pro

Thanks! Will need to post some pics of mods soon. Sent from my iPhone using Tapatalk Pro

Hi All. Recently picked you a Pacific Blue Sierra 1500 AT4 with Premium Package. Truck is great. Everyone loves it. Started a few minor mods to personalize. Coming from the import car scene. Will be looking for inspiration, help with a few issues, learning what trucks are for [emoji4]. Out in Manitoba, Canada. (uploading from the phone sorry if this is massive will fix later)