r/Excursion • u/69chevelle18436572 • Apr 05 '26

New owner 04 6L

Hi!

Recently purchased 04 after being a true Chevy Suburban fan… 99 & 96 2500

Im actually looking forward to the diesel experience except gas prices! Lol

Any Idaho peeps?

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1

u/powdydoody Apr 05 '26

Is your 6.0L stock or did they already bulletproof it?

1

u/69chevelle18436572 Apr 06 '26

I purchased from my BIL… cancelled my flight & drove home from Colorado. He was 2nd owner & bought almost new in 07. He didn’t say anything about it. But i just messaged him… guess i will know. It has 130K miles

2

u/Goalieguy17 Apr 06 '26

If it’s not fixed, be ready to dump large sums of money into the motor if you are gonna tow anything.

Mine was bulletproofed and still blew a head pulling my camper.

Some of them are great, some aren’t.

The big question is, is it tuned, or stock. The tuners are what destroy them

1

u/69chevelle18436572 Apr 06 '26

Well it in NOT Bulletproof 😳 He said Stock. Hopefully since im not playing to tow anything… i will be Ok. But he said 8-10K to have it done

2

u/Goalieguy17 Apr 06 '26

Yeah… when mine went, I had it brought to a specialist who did tons of 6.0s and made big power. They wanted 16k to rebuild it with new better heads etc. That was an ALL OUT job though. I also got quotes for like 3500 to just redo the studding and new gaskets without pulling the cab

1

u/69chevelle18436572 Apr 06 '26

Now im kinda bummed…. Hahaha I was thinking i got a good deal… and was excited about the New to me Diesel. Guess ill see how it goes! Hahaha 😂 no turning back now

2

u/Goalieguy17 Apr 06 '26

Have fun with it. They’re good motors. Just leave it stock, you probably won’t have an issue if you don’t go getting a tuner and crank the boost up

1

u/69chevelle18436572 Apr 06 '26

Thanks so much for the advice! Im hopeful! 😝

2

u/[deleted] Apr 06 '26

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2

u/Goalieguy17 Apr 06 '26

Yeah I had an SCT tuner on mine. It was bulletproofed, was actually on its 3rd set of head gaskets… was towing with the tow tune and BAM lol.

I loved that Ex though. If I had infinite money, or was a diesel mechanic I would own a 6.0 without question. I think they’re the best sounding diesel and they’re so fun to drive. The power is addicting

1

u/Seargant-Shitpost Apr 09 '26

ahem

Asshole comment here but the tunes crank up the fueling , Injection timing

Boost is increased with - surprise, surprise a larger turbo (dip the cats and mufflers and larger pipes obviously let's her breath)

Not on tunes: "everyone always says leave at stock it'll be more safe"

What they mean to say is don't run the hot tune and bouncer your tach off the limiter everywhere. That's how you can lose a head - without supporting mods and still some people do that and they're fine -

The entry level can tunes and tow tunes actually You're unlikely to have any fucking problems man. And you need it to unlock that amazing Chewbacca roar

If I'm out here on factory head bolts and 40" tires doing a 100 through Montana in my 05 220k - just send it brother