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  1. KWIKNVA

    Weak Radio Signal from NAV Head Unit

    I have a 09 Yukon Denali. I'm getting one FM station with a decent signal. All the other FM stations are poor if not there at all. This must be a common GM issue cuz my 02 Sierra basically has the same issue but worst. My wife's MDX has no issues. I doubt it's our location. Anyone?
  2. KWIKNVA

    Very weak FM Signal from Navagation Radio

    Basically the same issue here. I have a 09 Yukon Denali. I'm getting one station with a decent signal. All the other stations are poor if not there at all. This must be a common GM issue cuz my 02 Sierra basically has the same issue but worst. I replaced the factory radio with an...
  3. KWIKNVA

    Cold Start Engine Knock Concern 09' 6.2L

    If like mine, I was able to clean the MAF sensor to correct the rough idle. Resolved my check engine light. Once you know the code that will get you going in the right direction.
  4. KWIKNVA

    Cold Start Engine Knock Concern 09' 6.2L

    Actually I just got the yukon back from the dealer. Never a good place to take a vehicle for warranty work if you ask me. Took 3 weeks and they actually did nothing but let the truck idle. At first they said no noise. I had to tell them to drive it! Then the tech and ext. warranty adjuster...
  5. KWIKNVA

    How the hell do I remove those last bolt?!?

    I went with set of slotted and dimple rotors from Brake Performance with OE pads for my wife's MDX. So far so good on noise, performance and rust. My brother has a set on his C5 and has been happy with them. My biggest issue is rotors that have hats that rust. Makes any nice rim and tire...
  6. KWIKNVA

    Whining noise

    A rear end would make a "whine". if you hear a humming sound then it could be electrical. Try turning off your radio. I have an Alpine in my sierra and it will hum and change pitch with the rpms. Even if the volume is cut low. I turn radio off no hum. Also I recall a friend with tires that...
  7. KWIKNVA

    Whining noise

    Hmmm, A hum would suggest a electric noise that you would get from the radio. Do you have a aftermarket radio or amp installed? I'm no audio installer but could be feed back from the alternator through the speakers if it's a hum. Do you still hear the noise with the radio completely off?
  8. KWIKNVA

    Exhaust Manifold Bolt Replacement

    Thanks! Unfortunatley this part numbers are for bolts UHL 25mm & 20mm. Dealer specs are M8 - 1.25 - UHL 30mm.
  9. KWIKNVA

    Exhaust Manifold Bolt Replacement

    So, I've been struggling with this engine knock in my 09 Yukon Denali. I've decided to take it into the dealer. Service adviser almost with out hesitation thinks I have a collapsed lifter. So maybe in a week I'll know for sure. I also will have my exhaust manifold bolts replaced as I have a...
  10. KWIKNVA

    Exhaust Manifold Bolt Replacement

    Yeah, didn't pay close attention and post to the wrong section, However still good info. Not sure the mystery oil will fix my lifters as I'm past the normal tapping sound. She is knocking pretty good. It may quiet them down some. I have an extended warranty so I hope for all new lifters...
  11. KWIKNVA

    2007 Yukon Transmission Rebuild

    Sounds about right. Ex. A built 4L60E from a place like RPM transmissions would range from 2k-5k. (not including removal and install)
  12. KWIKNVA

    Exhaust Manifold Bolt Replacement

    So, I've been struggling with this engine knock in my 09 Yukon Denali. I've decided to take it into the dealer. Service adviser almost with out hesitation thinks I have a collapsed lifter. So maybe in a week I'll know for sure. I also will have my exhaust manifold bolts replaced as I...
  13. KWIKNVA

    Premium vs Regular = Spark Knock

    Wow, Does your owners manual recommend regular? I know mine 09' says 6.2L require 91 octane or higher. I do recall seeing a sticker inside my fuel door saying the same. See below Gasoline Octane For all vehicles except those with the 6.2L V8 engine (VIN Code 2), use regular unleaded...
  14. KWIKNVA

    Transmission Help!

    I think I discovered my actual problem. My 09 Denali has been knocking on cold starts. First thought was piston slap or lifter tap. Neither seem right due to how long it takes for the knock to go away etc. Truck idles with no knock, only when accelerating. With the motor/trans cold I got...
  15. KWIKNVA

    Cold Start Engine Knock Concern 09' 6.2L

    After a little more research or surfing the web for more info. I came across a potential solution. Seems the LS series motors are notorious for lifter tap. Based on what I've been reading piston slap and lifter tap are nothing alike but easily mistaken to be the same. I've been around GM...
  16. KWIKNVA

    Cold Start Engine Knock Concern 09' 6.2L

    Oil is good. I just find it odd that the knock is only present when the engine is below 200 degrees. Once it hits above 200 smooth as can be. If I park for 30-60min allowing the temp to drop to to 125-150 the knock is there until the engine reaches 200+ again. Another thing is on a cold...
  17. KWIKNVA

    Cold Start Engine Knock Concern 09' 6.2L

    Anyone think I should be concern with the cold start knock I get on a 50-80+ degree day? My concern is that it won't actually fade away until the engine has ran for 10min at 200-210 degrees. Once she is hot everything seems normal. I've read about this issue should only persist on avg...
  18. KWIKNVA

    Need Reputable Mechanic or Dealer in NVA

    Looking for recommendations on a good place to take my trucks or plaese advise on any place to avoid. I have a 8.1L 3500 DRW & 6.2 Yukon Thanks
  19. KWIKNVA

    Need Help With Rough Idle!!!

    Ok, so far so good, the now clean MAF sensor has the idle smooth with no lope at cold starts and no codes. $8.00 dolla fix. :)
  20. KWIKNVA

    Need Help With Rough Idle!!!

    I reset the codes and removed and cleaned the throttle body. Codes P0172 & P0174 came back almost instant. Same rough start. Next I'll clean the MAF which looks like it time for a few squirts of cleaner. I want the issue to be bad O2 sensors due to making this a easy fix however I'm starting...
  21. KWIKNVA

    Need Help With Rough Idle!!!

    Hello, Ok, I have a 09 Yukon XL 6.2L that has a rough idle when cold started. Takes about 6-10 sec for the idle to smooth out. Basically it's runs like I have a cam with a 112 LSA. Now I have codes P0175 & P1400. Note P0172 & P0174 are showing in the history. I've read a few threads...

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