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  1. DPGDirk

    NBS rear axle swap options?

    Wondering if NNBS rear axle assemblies are the same as NBS or not? If not, are any of the NBS rear assemblies different? I have an '03 Yukon, 5.3 with 3.73 gears. Wondering if any of the Denali or other 6.0L Yukons or Tahoes may have had heavier duty axles that will bolt in to my rig? Thanks!
  2. DPGDirk

    NBS rear axle swap options?

    Wondering if NNBS rear axle assemblies are the same as NBS or not? If not, are any of the NBS rear assemblies different? I have an '03 Yukon, 5.3 with 3.73 gears. Wondering if any of the Denali or other 6.0L Yukons or Tahoes may have had heavier duty axles that will bolt in to my rig? Thanks!
  3. DPGDirk

    Rear locker/diff issue?

    So I'm driving the other day and took off from a stop at full throttle. On the 1-2 shift, I heard a loud popping noise and the engine revved free. I got out of it immediately, but something clearly broke. I was waiting for a driveshaft to start banging around or other calamity. I was looking for...
  4. DPGDirk

    NNBS intake & TB info...?

    Would a replacement '07 NNBS intake and Throttle body be what I'm looking for for more power on my '03 Yukon 5.3L? I've heard this is good for a power increase. I see AC Delco OEM replacement units on Rock Auto for a decent price. Is that the right parts? Looks like #2172422 Throttle Body and...
  5. DPGDirk

    Need NNBS intake and Throttle body for 5.3L!

    Anyone know where I can get my hands on a NNBS intake and throttle body? Heads have to come off my 5.3L due to broken rear exhaust manifold bolts that won't come out, so I'm thinking I wanna swap on the better intake instead of reusing the old one... Thanks!
  6. DPGDirk

    Over drive alternator pulley- need shorter belt?

    Hey guys, doing a new 140amp alternator with my fan swap and using the smaller overdrive pulley from LS1fans .com. Will I need a shorter belt? I've heard it both ways... Thanks!
  7. DPGDirk

    Best 4L60E trans?

    Well, my '03 Yukon has 165k on the clock and I'm looking to beef up performance a bit. Motor is stock with airbox mods, AiRaid tube and I have LT's, ORY and Cat back on the way. Thinking E-Fans, new radiator and cam once spring rolls around. I'm thinking I might be better off just redoing...
  8. DPGDirk

    Upgraded fuel pump?

    Looks like I need a new fuel pump for the '03 Yukon. Had the filter replaced recently, so I guess it must be the pump. I see a lot of pumps out there at a wide variety of prices. Is there a better quality or performance pump I should look at or just replace the stock pump? Any brands to...
  9. DPGDirk

    BBP tune review...

    Got the '03 Yukon tuned by Justin this past weekend. Really surprised at all the improvements it made! Power is definitely up. Not like installing a supercharger, but definitely noticeable. Shift points are firmer. Will kick down to 2nd gear at any speed below 72mph. Factory...
  10. DPGDirk

    Need info for LT's, ORY, muffler, everything as a kit for '03 Yukon 4WD

    Guys, I'm confused. I'd like to redo the exhaust on my '03 Yukon. It is a 5.3L with 4WD. I don't need the larger tubes as I have no plans to boost power all that much. Probably a mild to moderate cam and maybe a little higher stall converter. I do tow a polaris around occasionally and saw a...
  11. DPGDirk

    Code P0446- Failed EVAP vent solenoid- 2003 Yukon???

    Anyone done the updated/relocated solenoid on one of these? I know there's a mod that requires a section of heater hose to relocate the valve as I live on a dirt road and keep throwing the P0446 code. Does anyone know the specific part #'s for this fix and/or details? There's a ton of...
  12. DPGDirk

    '03 Yukon Mod Progress

    Here's my '03 Yukon 4x4 when I bought it: Here's where I'm at so far: First, we removed the door trim and debadged it. Then, I shot the front grill, both bumpers and side mirror caps in black Plasti-Dip. Sprayed the rear tailights and front lower turn/marker lights with...
  13. DPGDirk

    20" x 9" rims w/ 5.5" backspacing OK for '03 Yukon?

    20x9 w/ 5.5" backspacing OK for 275-55-20's? Looking at a 2/3 drop on my '03 Yukon. I see Mcgauheys says aftermarket cast wheels likely won't work with their spindles...? What's up with that? Any difference between them and Bell Tech Spindles for fitting this tire/wheel combo? Thanks!
  14. DPGDirk

    Help a Newb with lowering questions '03 Yukon

    OK, so I have an '03 Yukon SLT 4WD. Came with factory 17" wheels. Has the Nivomat rear shocks. I'm looking at a 2/3 drop, nothing more as I need to use this truck on a dirt road in the winter time and I tow a polaris ranger & trailer occasionally. I really want the truck to ride nicely as I'm...

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