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Found 313 results

  1. I've got a 2009 Yukon that has some random LED headlights in it. I really like the look of the led's but they are garbage as far as visibility. Anyone have a bulb combo that seems to work well with the stock Yukon headlight assembly?
  2. Has anyone had a rear compressor issue with a new Yukon XL Denali? My wife and I bought the vehicle at the beginning of October 2018 and within a month the rear compressor began running excessively. We took it into the dealership with bought it from and the service rep heard the noise but was unable to reproduce it later in the day with the technician so they sent us away with the vehicle. The noise became more and more regular so we took it to a dealership near our house and they heard it and acknowledged the problem, this lead them to replacing the rear compressor. The change of the rear compressor didn't do the trick and the excessive running persisted, this is where the frustration really set in. The service technicians were going to run diagnostics and service the vehicle after we brought it in MLK Day. The service department manager interrupted the process and essentially tried to bully my wife into accepting the fact that this is normal behavior for a GMC Denali line vehicle. She left the dealership in tears. I called the service manager in disagreement with 1) his treatment of my wife and 2) disputing the fact this is normal. His response was the discharge the video with a bogus report emphasize the vehicle was in intended working condition. Now the Denali is sitting at another dealership while they try to replicate the issue. It occurs 30-40% of the trips we take in the vehicle and the rear compressor will run anywhere from a few seconds to 20 minutes. Has anyone else had this issue and found a resolution? I'm to the point I'm almost willing to just sell the vehicle back for a loss to be rid of it.
  3. I just bought a white frost 2019 Sierra Denali and want to blackout all the chrome on it. Anyone have experience doing this? Want to do all the badges, grill, door handles etc. I’m thinking I will take the chrome grill and lower insert around the tow hooks out and acid wash them to remove the chrome and get back to the ABS plastic and have them painted, but didn’t know if there was an option that was better? Here’s a couple of the pictures as is now. I’ve ordered black 22” rims and the leveling kit, but once those are on I want to get the rest of it blacked out. Thanks
  4. Hi everybody! As some of you may know, I've been working hard to help the lovely members of this forums program some of their vehicles to add unique and exciting features to their trucks and cars. Well, I'm happy to announce a project I've been working very hard on over the last few months. Welcome to Coastal Flash! Final_Short.mp4 We have been spending countless hours taking the time to develop new products and features for our line of vehicles and add them all to an easy to use marketplace for all members of the forum to enjoy. We're happy to offer free shipping on all kit purchases across North America and also are happy to provide phone support to anybody who purchases our services. Plus, we will beat any price quoted by our competitors on kits and programming services. It's not about being the cheapest, but about making these upgrades more affordable for the average user. The entire reason this market was formed was because we felt the current market was monopolized and overcharging for their services. Coastal Flash is here to put an end to that. Currently, we offer: Both 2.0-2.5 HMI Carplay/Android Auto kits & Programming Denali Cluster Programming and Upgrades Video in Motion Unlocks Rear Camera in Motion Unlock & Harness Custom HMI Boot Animations and Splash Screens Amplifier repair Late 90's - mid 2010's Radio Linking and Testing Navigation Updates Custom Reverse Engineering Services And many more services... So please, if you are interested in getting any of these upgrades done to your vehicle, I encourage you to take a look at what we've been up to! Feel free to take a look through some of the upgrade threads posted here on the forums and look at the reviews some customers have been leaving for our services. I think their words speak for themselves. I'm also very open to ideas or suggestions from forum members of what you'd like to see installed into your vehicles, so feel free to send me a PM or an email and let me know what mod you'd like to see done next. Nothing is too big or too small. I'll be consistently monitoring this thread and updating it with new services and discoveries as we make them available. Oh, and one more thing, we're offering some special discounts for Black Friday and Cyber Monday so feel free to stop by, take a look around and save some cash on that new upgrade you've been wanting to get. Thanks for stopping by and thank you to everyone who has shown us so much encouragement and support over the last year as we've gotten our products and services tuned in. I can't wait to show you what else we have in store for you in the near future Talk to you all soon... -Mag
  5. Working on 2014 GMC Denali, lost all control of windows from driver door master switch. Purchased new switch, no change, found (green/yellow) wire snapped in accordian sleeve between door. Spliced wire at each end of harness and ran new wire. Now have control of every window BUT my driver door.
  6. Good Afternoon fellow 6.2L enthusiasts. I apologize if this sounds like a commercial or a rant. I just like to share what I've experienced and discovered. So, I don't know about you, but I've been searching for a way to cram more air into my L86 that won't break the bank. I've done hours upon hours looking for the perfect bolt on's or practices that will help the block breath deeper. I've learned that swapping intake manifolds are not worth it however, porting makes it one bad ass manifold. (which i've done) I threw on an AFE CAI and that really helped get the air moving. (momentum GT pro 5R) Headers and a bigger full exhaust helps get the flow rolling. (I'm rocking TSP 1 7/8 Headers with a 3.5" full exhaust (catted with Cal Cats) and a Flowmaster Pro series Muffler) Cylinder Heads and a Cam shaft will transform your truck. (going with TSP Heads and a Trick Performance Cam package) And a basic tune wakes these bad boys up. (local dyno-tuner) That being said after the above you're looking anywhere between 430-530 HP N/A. Obviously the Cam specs are going to swing that number. Now, The one thing that I have NOT been able to find is a Larger Throttle body that will fit the L86 Stock Manifold. So I did what most have done and ported that sucker out. The only issue is it will never be larger than 87mm. Until this came along. https://www.bbkperformance.com/92mm-throttle-body-14-18-corvette-camaro-lt1.html FYI slight modification is required to the stock Manifold. You need to shave the base of the Vacuum port as well as the MAP sensor base for the frame to fit. Once that is done you're rocking. I was able to Port match the TB Bore to the manifold inlet and smooth out the transition. Honestly I can immediately feel the difference. When I get a little bandwidth I will throw on some videos of Cold/warm starts, take offs etc. If you have any questions feel free to reach out!
  7. We are upgrading to a 2020 GMC AT4 HD 3500 and should be delivered soon. Asking $47,000 Follow this link for additional photos Facebook Marketplace ad So...Look no further for your next tow vehicle! Tow in style, tow with confidence!! This 2015 GMC Denali HD 2500 in Black Onyx has all the bells and whistles and more! She has only 52500 miles on her! This truck has been upgraded with BlueOx Gooseneck Hitch, a Second 7 Way connector in bed to secure your Gooseneck or Fifth-Wheel camper trailer wiring harness to help you tow in comfort and with confidence. It has also been upgraded with a Pop-A-Lock remote lock actuator for tailgate (unlocks tailgate when you unlock your truck). To help with those horrible GM headlights, this Denali has been upgraded with GTR Lighting Gen 5 HID 5000K headlights and Morimoto XB LED foglights...I cannot begin to tell you how much of a difference this has made! For just that little bit of oomph or MPG, this GMC has also been upgraded with the Banks Ram Air intake and Banks exhaust with chrome tip. Upgraded Shocks to BILSTEIN 5100 series shocks at 43500 miles. A Banks AutoMind programmer, is available and negotiable with purchase of this 2015 GMC Denali HD.
  8. I just recently purchased a 2017 GMC Yukon XL Denali, with the 6.2L engine. I noticed the stock low beams are not that bright, as well as that sometimes they produce a white output and others become yellow. I had both of my headlights with assembly’s replaced under warranty and still is occurring. Has anyone ever experienced this issue, or been able to noticeably see their headlights change from white to yellow?
  9. After being down nearly 6 months the Denali is almost finished. The shop based out of Hudson, NH “Granite State Dyno and Tune” has been incredible. Super professional with absolutely top notch craftsmanship. Here is the build. 2014 Sierra Denali 6.2L Block: GM 6.2L. Forged crankshaft Forged rods Diamond 10:7:1 Pistons. Precision Race Components ported Cylinder Heads w/ valve job PAC spring/ Valve Kit. Comp Cams rocker arms/trunion Texas Speed & Performance Stage 1 Camshaft +30% fuel lobe TSP AFM delete kit Lingenfelter ported 95mm throttle body Ported L86 intake manifold. All ARP bolts or studs. Fuel: GM ZR1 high volume fuel injectors GM ZR1 fuel pump Armageddon 465 LPH in tank fuel pump Snow Performance Stage 3 Meth Kit with controller and braided lines. Turbo: Borg Warner S480 T6 Turbo 1.32 AR billet 110/96mm. Turbo smart 50mm BOV Turbo Smart 60mm waste gate Pro Boost controller fully wrapped exhaust Cooling/Oil separators Mishimoto fully aluminum Radiator Mishimoto R-Line Intercooler 31x 12x 4” Mishimoto HD Trans Cooler 2X Mishimoto Black Aluminum catch cans. Mishimoto 180 degree thermostat. Transmission: Circle D pro 3 torque converter 2700 stall. I think that sums it up... I will post tuning videos and some driving as they come around.
  10. Hello everyone, On my 2020 GMC Sierra 2500HD Denali I did a hood air induction vent swap for a chrome vent cover and while I was at it I added Led RGB lights inside the vent taking care not to restrict the air flow. Has anyone else done any chrome or Led RGB mods? If so lets see them please.
  11. I need help figuring this one out, I just bought this Yukon XL (100k) and drove it home (about two hours of driving) and I had a fluid puddle on my driveway the next day. So I checked it out and the only spot where I could find any “leakage” was from the drivers side motor mount. There were no other apparent fluid leaks or spills from anywhere else. I took it in to have it looked and and the liquid had dried and only left minor stains. He thought I was crazy at this point. I asked the tech if he could check the parts listing to see if it was fluid filled. He came back with a engine mount checklist which states to check for fluid leaks from the mount if equipped with GLYCOL(i.e. coolant) but also said he doesn’t see any signs of a leak even after I showed him pictures and he pulled up the inspection checklist. I need proof that the mount needs replaced because the fluid has leaked out. GLYCOL dries to show very little sign of leakage. How much fluid could he expect the mount to hold to keep leaking? How can I know for sure that this mount is the fluid filled kind or not? I took pictures of all of this.
  12. This has been an on-going research project of mine. I discovered when I inquired about having the Trail Boss (TB) factory lift kit (GM part# 84629787) added to my 2019 LT Z71, that I could not have the kit installed due to the secondary composite leaf springs on my truck. Upon further investigation, I found that ONLY the LT with 5.3L (and LT with 3.0 diesel and short box) had the composite leaf springs preventing the truck from having a TB lift added. On the GMC side, I found out the Sierra Denali also uses the same leaf springs with composite secondary as the LT 5.3L. My first impression was, “why the heck would GM do this?” Why wouldn’t the LTZ or High Country (HC) have the the composite leaf? Why would only the mid-level LT have it? The Sierra Denali has it and it’s a $60K+ truck. My LT averages around $45K. I might be a little upset as a LTZ or HC owner to find out my rear suspension is the same as on any Custom trim truck, or even, the base W/T model. I’ve doing a lot of reading on composite leaf springs and there are more advantages to them than disadvantages. Though they are dimensionally bigger (thicker) than the steel counterpart, they weight a lot less, last longer, and offer better damping properties than steel. GM has had a good track record using composite leaf springs. The same technology has been used on the corvette since 1997 with the introduction of the C5. Disadvantages are minimal, such as, they are more expensive to produce, can burn up in a fire, and in this case, can’t be further bent or altered out of original specification. This must be the reason GM won’t allow the lift to be added to vehicles with a composite leaf. I’m sure the leaf could take the additional stress, GM engineers just want to play it safer than sorry. So with this, the Silverado LT 5.3L (and LT 3.0 diesel with short bed) and the Sierra Denali are the only trucks to use the composite leaf. Though I’m disappointed I won’t be able to get the TB lift added, I’m now pretty stoked to find out my LT has more mechanical innovation put into the suspension and I didn’t have to spend $15K+ more for a Sierra Denali to get it. However with this, it seems that if someone is looking for a top-end truck, the Denali would be the better choice over the HC which lacks the particular composite leaf spring feature, if that mattered to the buyer. For reference, attached here are the GM compatibility charts for the Silverado and Sierra to see if you can add the TB lift kit. Also here is a link to the previous discussion about the TB lift kit where you can find more detail about installation and issues surrounding the composite leaf springs.
  13. *New to Forum *First Post I was involved in a rear end collision this morning that damaged mainly my rear bumper. This afternoon I was driving down the highway , and alert popped up saying “Side Detection temporarily unavailable”. I’m trying to figure out if the sensors were possibly damaged in the collision. Taking my yukon in for an inspection of damage tomorrow and want to make sure I include anything that could relate to the accident . Anyone know where the side detection sensors are located?
  14. Hello brothers and sisters. This is my first forum post. Just wanted to make this so you can show off ur 2019 5.3 Denali and give me some ideas what to do to mine? This is my truck as of right now. Only thing I’ve added was a magnaflow muffler but it’s a bit too stock sounding thinking about going for the muffler delete entirely. Anyways please share what you’ve done to ur 5.3 Sierra
  15. Love my 2019 Denali but couldn't believe my eyes when i came out this morning and saw water on the back passenger side seat. 6 month old 65K truck and it leaks!!! Did a quick search and found others with the exact same problem and the exact same location. Will be calling service center in the morning. Here's another one I found. I took videos and pics if anyone is concerned what to watch for. My son is allergic to mold for me this problem is larger than most. Attached a pic of the headliner, can see how soaked it gets.
  16. Okay, after 11 months of agonizing mishaps, set backs and over all triumph, I figured it was time to immortalize my truck in a new post. Please welcome my 2014 GMC Sierra 1500 7.0 (427) Turbo Build! Block: Texas Speed and Performance Darton sleeved boost ready block; 7.0L (427). TSP Forged wet sump crankshaft 4.0" stroke 6.125 Boost specific billet I-Beam Rods CP 4.125 -12cc Dish Pistons w/upgraded wrist pins. Clevite main bearings Clevite rod bearings ARP Main stud kit Cylinder Heads/ Intake Precision Race Components ported Cylinder Heads w/ valve job PAC spring/ Valve Kit. Comp Cams rocker arms/trunion Texas Speed & Performance SV Camshaft +30% fuel lobe TSP AFM delete kit Lingenfelter ported 95mm throttle body Ported L86 intake manifold. All ARP bolts or studs. Fuel: GM ZR1 high volume fuel injectors GM ZR1 fuel pump (high side) Armageddon 465 LPH in tank fuel pump (low side) Snow Performance Stage 3 Meth Kit with controller and braided lines. Turbo: Borg Warner S480 T6 Turbo 1.32 AR billet 110/96mm. Turbo smart 50mm BOV Turbo Smart 60mm waste gate Pro Boost controller fully titanium wrapped exhaust Cooling/Oil separators Mishimoto fully aluminum Radiator Mishimoto R-Line Intercooler 31x 12x 4” Mishimoto HD Trans Cooler 2X Mishimoto Black Aluminum catch cans. Mishimoto 180 degree thermostat. Transmission/driveline: Circle D pro 3 torque converter 2700 stall. Custom 5" 6061 aluminum driveshaft rated for 1,200hp 7,300trq MORE to come. I need to get the final tune with the new block. Still runs very well on the old 6.2 tune however, going up to 7.0 adds a layer of goofy on vacuum or under boost.. Next steps Get the PATC Stage 4 transmission kit stuffed into my 6L80E and retune to 900+ whp! Hoping to have that underway around March! Let me know what you all think. Ask any question. I'm open to where I purchased parts, cost of build etc. especially my opinion getting into a build like this.
  17. Is anyone else having an issue where the automatic start-stop feature on the vehicle stopped working? I just got the truck about 3 weeks ago (Brand New) and this is the only feature giving me an issue. It worked at first, but after driving it a week, it has not worked since. The only modification I have done on the truck is change out the License Plate light bulbs from halogen to LED. I'm at the dealership right now and they can't figure it out, so they are trying to contact GM regarding this issue. No error codes showing up according to them.
  18. Recently I noticed my navigation not working in my 2016 Sierra Denali. The GPS has a red X over it. I have done some research and most people are saying the green onstar light on the rearview mirror turned red when they had an issue. Mine is still lit green but no GPS signal. Can anyone point me in the right direction for a fix?
  19. The rattle we had was coming from headliner behind the passenger seat, and was typically worse at medium to highway speeds. It is noticeably louder with the sunroof cover slid back(open). My fix: Open rear passenger door and stand on running board to access the roof rack. If you wiggle the crossbar of the rack it has the slightest of slack, but just enough to make a clanking sound. I wedged some thin flexible magnet pieces(no the rack isn't magnetic, just what I had handy) in between the crossbar and the roof brace in front of and back of the bar(see pic). Viola...no noise. If these come loose I will come up with something more robust(maybe some two part epoxy). I'm not familiar with the inside of the 2015-2019 Suburban, Tahoe, and regular Yukon's, but the ultra quiet cabin of the Denali amplifies ANY little rattle or strange noise. I was used to the road noise and rattles of my 2007 Suburban(288K). They went kind of hand in hand. This one will take some getting used to. I know, suck it up buttercup. Now...back to the "other" issue... front end clank, clank, clank-clank after medium to hard braking, but occasionally during acceleration, and less occasionally steady speeds. No specific rhythm, almost like it's swinging in the wind, and then it suddenly stops after a few seconds. Please help if you know anything! I WILL fix this too! There is a video from another in a different thread on here that has the EXACT same issue/sound as mine.
  20. Hello, I was thinking of purchasing a 2016 Yukon Denali, but after reading a few forums on here it seems like there have been a few issues with the 2015 model ( buffering noise and vibration). Have these problems been sorted out by GM in the 2016 model? If not is the problem big enough to avoid purchasing a Yukon Denali? Thanks
  21. Ok, something just started happening with our 2016 GMC 2500HD Denali 4x4 with the diesel. The remote door lock and unlock won't work every time from either of our fobs. We bought this truck last August so I can't imagine the batteries in both of our fobs have died at the exact same time and only 7 months in. My fob gets used the most with my wife's fob barely getting used at all. Anyone else experience/experiencing this? And, what did you do to remedy it? I guess we can try replacing batteries first, but batteries only lasting 7 months in a fob? And both failing at the same time, especially given one gets frequent use and one barely gets any use. We know it's not a fuse because it does work from time to time.
  22. Hello all, Thank you in advanced for checking this post out! I have a 2018 GMC Yukon 6.2L L86 10 Speed. Under harder acceleration there is a rattle noise that appears under the hood passenger side. This noise can be played around with by the amount of throttle you give or take. Letting off the throttle just a hair noise goes away, accel little more and comes back. While you hear the noise and keep same throttle position it will go away shortly as if the load on the motor isn't as high. Sounds like it could be the high pressure fuel pump engaging. Has anyone herd this, or know a little bit more incite on this topic what it could be? I have not taken it in for service, does not sound threatening, just noticeable. Thank you, Blake
  23. I am having issues with my brand new 2015 GMC Yukon Denali. I was so excited to get this new car. It had a leak in the back right rear window from the start. They had to replace the entire headliner in the interior. Now I've got a shiver when in idle both in gear and out of gear. It feels like the car needs more gas. I've taken it into the shop 3 times now. The service department, after listening to my complaint and acknowledging the shiver, ultimately states that the car is "operating as designed". I've test driven a 6.2 liter Denali that does not have this issue. They've stone-walled me at GM, essentially saying they can't fix a problem that doesn't exist. Has anyone else had this issue? You would think that a brand new car wouldn't have this issue, and that they could do something to fix a rough idle. I'm beyond frustrated. I'd love to hear if anyone has the same problem.
  24. First time poster, long time GMC customer. 2015 Yukon Denali XL 63,000 miles 4wd. Got in the vehicle to take my family out to dinner on July 10th, 2017. Less than 1/2 a mile after driving I noticed the idle wasn't right and felt a slight shudder. I slowed down and looked for a place to pull over. About 10 seconds later the truck stopped running and I pulled over to the side of the road. There was no warning lights on and all gauges showed the correct temps and readings. I tried to start the truck and it turned over but didn't start. After that initial attempt the starter would not turn the engine over. My first thought maybe the battery was dead and that caused the truck to stop running. Hooked up jumpers and no difference. Had the vehicle towed to our local dealer Watson Chevrolet in Tucson. After the dealer removed the pulleys and tried to turn the block by hand they called to inform me that my Yukon had overheated and seized the block. I was shocked to say the least! Apparently there has been a light leak in the radiator that was not noticed by me or their service department. The dealer is taking the stance that since the radiator was not covered by power train the repairs to the motor will not be covered. My stance is that the vehicle never had a low coolant warning or even showed a change in the engine temp that was out of line. The temperature gauge read normal the entire time and no warning lights or messages ever came on. 5 weeks prior I had the truck into the same dealer trying to resolve a hard shift problem. They replaced the valve body on the transmission and the temperature sensor for the transmission. Apparently the transmission sensor was not displaying the correct temp and needed to be replaced. The dealer wants me to authorize a tear down to see what the cause was. It is apparent that the radiator leak was the cause of the overheating but I had no indication that is was low on fluid or that it was overheating. The dealer can't tell me if they find that the warning system or gauges were not functioning properly that the warranty will cover the rebuild of the motor. I am looking for advice on how to proceed.
  25. I recently bought a used 2016 Sierra Denali 5.3L 4x4 in March with 48k miles. Truck has been great until yesterday (now 52k miles) when I ease into the gas it shudders and shakes like crazy until i punch it. The tach is bouncing up and down and it doesn't matter if it's in v8 or v4. It almost feels like it's a misfire but it's weird that it only does it when I'm easing into the throttle or going uphill. The truck has the 8 speed transmission. Has anyone else ran into something like this and would the manufacturer warranty cover the fix for this?
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