Search results

  1. M

    2004 Denali 6.0L throwing Codes P0174, P0171, P0101, P0446

    Of course they are. Why would they make anything easy to maintenance? Grrrr.....thanks for the quick answer man, I appreciate it.
  2. M

    2004 Denali 6.0L throwing Codes P0174, P0171, P0101, P0446

    Sorry it took me so long to get back to this, I have had a lot of "life" happen recently, so I am just now getting around to servicing this thing. Will keep you posted on what I find. I followed my fuel lines for as much of them as I can see along the drivers side frame rail, and I don't see a...
  3. M

    2004 Denali 6.0L throwing Codes P0174, P0171, P0101, P0446

    Do you remember which one you actually ended up buying? Those are cheaper than I thought they might be.
  4. M

    2004 Denali 6.0L throwing Codes P0174, P0171, P0101, P0446

    From everything I have read, this was prior to 2004. In 2004 they went to a returnless fuel system, where the regulator is actually in the gas tank.
  5. M

    2004 Denali 6.0L throwing Codes P0174, P0171, P0101, P0446

    I didn't clear them yet, I want to get the new air filter and fuel filter in first, but I didn't get to it this weekend quite yet. I am not able to check that stuff, I just have a code reader, not an actual scan tool. I don't mind paying someone to hook one up, but first I want to rule out...
  6. M

    2004 Denali 6.0L throwing Codes P0174, P0171, P0101, P0446

    That makes sense to me. Where is the evap purge solenoid located on the truck, and is there any way to test it, or should I just replace it? I already blew off the MAF sensor, so I will check the evap purge solenoid next. I didn't get to the Yukon this weekend, I hope to either tonight or...
  7. M

    2004 Denali 6.0L throwing Codes P0174, P0171, P0101, P0446

    Update: Used buddies non-leaking pressure gauge, 48 psi with key on but holds steady, and when started it jumps up to 58 and stays right there, whether at idle or revving the engine up. I am going to replace the air filter and fuel filter both, but I don't think that is going to fix my lean...
  8. M

    2004 Denali 6.0L throwing Codes P0174, P0171, P0101, P0446

    My CEL was already on. It had been for awhile, but initially it was just the EVAP code, so I didn't worry about it. But then it started to get the stumble to go with it, so I re-checked it. Update: I checked my fuel pressure last night with a Harbor Freight $20 gauge. Turned key on, read...
  9. M

    2004 Denali 6.0L throwing Codes P0174, P0171, P0101, P0446

    I hooked my code reader up last night, and those are the codes I got. After some research, I found the two biggest contenders here are intake gasket leak or fuel system problem. I plan on checking fuel pressure tonight, cleaning my MAF sensor (common to make P0101 show up), and have even been...
  10. M

    2003 Yukon Where Is My Coolant Going?!?!?

    Can I ask what coolant you all are running? I keep hearing nothing but bad things about the Dexcool that my Denali has in it now, and it's due for a change anyways probably. Did you guys go back to the regular green antifreeze, or stay with the dex cool? Thanks. Jeremy
  11. M

    Vibration at interstate speeds

    I discovered that my RPO code for the transfer case is NR3, which is a Borg Warner 4481 unit if that helps. Jeremy
  12. M

    growl noise during acceleration

    My 04 Denali did that type of thing once, and I would get a message on the dash that said service Traction Control, it ended up being a bad wheel bearing giving faulty wheel speed sensor readings. Basically, the computer thought the wheels were spinning, so it limited throttle. Kind of a scary...
  13. M

    Transmission not shifting real great 2004 Yukon XL Denali

    Update: I added 13 quarts of SuperTech Full Synthetic Dex VI fluid and a 24 oz bottle of Lucas Stop Slip Transmission additive when I put it back together with a new filter last night. I drove it to work this morning, and it is shifting better and the temps are running 10-15 degrees cooler so...
  14. M

    Transmission not shifting real great 2004 Yukon XL Denali

    Ok, I will see if I can get a magnet to throw in it. The 200 is when I have been doing more stop and go driving in town. On the highway, not towing anything, it will run around 160-180. It has been hotter than normal here lately too I guess. I'm hoping some of the temp problem was from the...
  15. M

    Vibration at interstate speeds

    I have recently got a vibration in my 04 Yukon Denali at 70-80 mph, especially when I let off the throttle. I immediately suspected U-joints, so I bought four spicer greasable U-joints. When I went to remove the front driveshaft, I noticed that when I pushed up on the U-joint near the transfer...
  16. M

    Transmission not shifting real great 2004 Yukon XL Denali

    The dealer showed me an invoice for around 1300 dollars, and I couldn't make out every line since a lot of things were abbreviated, but I did see a couple lines that were clutches and bands at least. When I pulled the pan yesterday, it is actually really clean. Almost no residue of any kind...
  17. M

    Front end noise

    CV joint in your halfshaft? They usually make more of a clicking noise than a scraping noise though. Typically those only make noise when a hard turn is made at low speed....
  18. M

    Transmission not shifting real great 2004 Yukon XL Denali

    I guess I missed whatever happened. Sorry if I did something wrong? For those of you that talked about upgrading to a bigger transmission cooler, which one did you go to? I'm going to drop the pan tomorrow and see what I got going on, hopefully it don't look too bad.... Jeremy
  19. M

    Transmission not shifting real great 2004 Yukon XL Denali

    Thanks man. Is all Dex VI synthetic? I didn't know if I needed to go with some Royal Purple type stuff, or just Dex 6? I had planned on doing the "redneck flush", where you pull the line that goes from cooler back to tranny, run it through all gears for a bit while someone else dumps fluid...
  20. M

    Transmission not shifting real great 2004 Yukon XL Denali

    Do any of you all have a recommendation for good fluid or additives for the fluid and filter change? I am finally getting around to trying that out, nothing else has seemed to help yet. Another thing I've noticed, oddly enough, is that when the cruise is set, the transmission downshifts and...
  21. M

    4L80E conversion

    Cool thanks, I will check that out. Jeremy
  22. M

    04 Denali air compressor issue

    I noticed my Denalis air compressor was having to run a lot more often, even when no weight change was added, and it kept getting worse and worse. Finally it seemed like it was running all the time, and it was starting to sound pretty bad, so I pulled the fuse. But before I did, when I was...
  23. M

    4L80E conversion

    Did you do this swap then? I am thinking of doing it myself, because I plan on towing a lot more with my Yukon, but mine is an AWD Denali, so not sure if the swap is even an option with that transfer case. If you did do it, about how much should I figure on spending?
  24. M

    Transmission not shifting real great 2004 Yukon XL Denali

    That's what I do with mine too, I just try to baby it, but I feel like if I start trying to tow with it that's going to accelerate the problem quite a bit. The towing light works on mine still. I haven't tried driving it around in tow mode, but I may try that first. Did anyone have a...
  25. M

    Transmission not shifting real great 2004 Yukon XL Denali

    In the summer time, mine runs right around 150-170 as well, the only time I have ever had mine even get close to 200 was lots of in town driving on a hot summer day with front and rear A/C blasting. Thanks everyone for responding on this. If I decide to do the fluid and filter change myself...

Forum statistics

Threads
129,120
Posts
1,810,766
Members
92,207
Latest member
2DoeProjectHoe

Latest posts

Top