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  1. GSDunk

    Fuel Pump Question....

    The fuel pump on my 2003 Yukon went bad so I went to pick and pull to find a replacement. I found one that came out of a 2004 Tahoe but as I'm attaching the 2 fuels lines and two wire harnesses to the new fuel pump, I noticed that my Yukon needs a pump that has a square shapped harness...
  2. GSDunk

    YouTube must save us Billions

    After solving a recent problem with my 03 Yukon, I started to wonder how just how much money YouTube saves us when our rigs breakdown and not having to take it to the local GM guy. Its gotta be in the billions right when you account for all makes of cars from all countries? Its kinda...
  3. GSDunk

    No start, no crank solved....at no cost

    A couple of weeks ago, I posted about a no start/no crank problem where the engine completely shut off coming into a stoplight at about 10 mph. Well I appreciate all the posts and its sure great to have a place like this to talk Yukons and Tahoes when something goes wrong with your rig and...
  4. GSDunk

    No start, no crank solved....at no cost

    Disregard this post
  5. GSDunk

    Help!! No Clue what to check.

    I've been driving my 2003 SLT for about 2 years and aside from a couple if annoying electrical problems, the old girl has run beautifully. The 5.3 has about 150K on it and is still as quiet and smooth as a V-8 can possibly be. Still purrs like a kitten and the synthetic oil is always golden...
  6. GSDunk

    E-Brake Chime... Won't turn off

    My E-Brake warning light in the center cluster won't turn off even though the E-Brake is fully released. Now the chime is on constantly unless I brake, stop or put it in park. After 5 minutes of constant chiming, you want to smash your head against a wall. How hard is it to get to the...
  7. GSDunk

    Electrical prob when I hit brakes

    I have a 2003 SLT and at night, all my lights work just fine.... Except when I hit the breaks... .Then the tail lights go yellow instead of red and the red arrows on side mirrors arent working correctly. This all started at the same time my left main headlight went out. I replaced it and...
  8. GSDunk

    700 mile report on first ever use of synthetic oil

    I recently became the owner of a 2003 SLT and after reading quite a few posts discussing oil changes and what is best for these 5.3 's, I decided on Mobil 1 full synthetic and a Fram synthetic oil filter. Well after 700+ miles on the new oil, I am now completely sold on synthetic and will never...
  9. GSDunk

    Castech Cylinder Heads

    I started doing some research on Castech heads after reading that my particular model engine (2003 5.3 VinT) could possibly have the faulty heads. I've read that you have to pull the valve covers and rocker arms to get to the Castech stamp. I've also read on another site that you can see a...
  10. GSDunk

    AC Doesn't Blow In Face or On Floor

    I became the proud owner is a 2003 SLT about 6 weeks ago and only two times have all the air vents actually worked. (Dual climate control) The 2nd time it magically decided to work, I was on the road and it worked great for the duration of the drive (about 1 hour)...but of course when I...
  11. GSDunk

    Questions About First Oil Change

    I'm about to do the first oil change in my 2003 Yukon SLT (currently 130000 miles) and I'm wondering what kind of oil you longtime Yukon owners recommend. I'm assuming some kind synthetic oil right? Also, I'll be taking it to a lube shop and was wondering what you guys regularly do every 3000...
  12. GSDunk

    My impressions of Yukon after one month

    Because my father has basically lost his vision and can barely walk he gave me his 2003 Yukon SLT And because he kept it in the garage for 14 years the gorgeous carbon metallic paint is still as glittery and shiny as the day he bought it plus it only has 128,000 miles on it And since he was...
  13. GSDunk

    2003 Yukon SLT question - 4.8 or 5.3

    I'm about to inherit a Yukon SLT and have a few questions regarding what is actually standard for the vehicle make and year.....specifically whether it came with a 4.8 or the 5.3. I've read that the 5.3 was standard for the 2003 SLT, but a few websites list the 4.8 as standard. Anyone know for...

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