How many miles do you have on your 6.0 liter motor?

[Badass69]

I've got a 2000 2500 6L with 322,000 km that runs great other than leaking valve seals and a hole in the muffler and never any engine knock. I thought it was getting a bit old so I bought a 2008 2500 6L with 200,000 km and I'm not too impressed. It knocks on cold start, fuel mileage is terrible, it doesn't the same power as the old one and there's creaks and rattles from all over inside the cab. I'm seriously considering selling the 08 and putting a little money into the 2000

Probably the best thing you can do to fix a gmt900... let someone else deal with its stupidity.

 

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[crankman]

1995 miles no knock no tick just a nice rumble.

[Rockman18]

I have 207k on my 04 with no issues

[gmctruckguy87]

08 gmc2500hd 182,000 miles

[joefuskie]

2000 2500 with 258,000 miles. Cold-knocked since I got it in '04 with 114,000. I always wait until the knock quiets down before taking off. Oil changes between 3-4,000. Leaks about a quart every 3,000 from the oil pan gasket.

 

 

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[tooch420]

I love to see everyone's trucks with all these miles and still going. Makes feel better about my measly 114k..lol

[RagsNB]

Mine a 2005 2500HD has 280,000 kms engine running strong sensors and grounds starting to give issues.

 

Rags

[sahls01gmc]

2000 2500 with 258,000 miles. Cold-knocked since I got it in '04 with 114,000. I always wait until the knock quiets down before taking off. Oil changes between 3-4,000. Leaks about a quart every 3,000 from the oil pan gasket.

 

 

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Your story is about the same as mine. If it really is your oil pan gasket, that's an easy fix! Gaskets are cheap. Mine unfortunately is the rear main seal...much more difficult to replace.

[Caleb G.]

245,000 and still running strong!!

[cjb321]

06 GMC 2500HD, 139k bought with 90k on it. Was beat up fleet truck when i got it but the company took care of the drivetrain maintanence.

Oil changed every 3-5k

AFE oilless air filter and Airaid mit at 92k

Lost 3rd and 4th gear in the trans at 94k

Replaced spark plugs (still looked new), wires and shocks at 105k

Original battery finally died in feb 2015

Oil pump at 137k, luckily it wasnt at high speed or anything, just had no oil pressure at startup, shut it down and had it towed home to fix.

As far as i can tell everything else is original from the factory other than tires/wheels and some interior pieces that i replaced or upgraded.

Edited December 19, 2015 by cjb321

[idnative1948]

My 2005 about worn out. Just turned to 88K.....

[Michael Johanson]

My 2005 about worn out. Just turned to 88K.....

I'm interested if your selling. I could use a new chassis for my drivetrain that's sitting in my 03 with over 300k now.

[Dixon700]

213750 mi on The 02 I just bought. Motor sounds good and runs good. Just the slightest knock when it's real cold out.

[Dcshoeco87]

265,000

 

Just started a random knock when warmed up

[megabell]

288k on my '04 Sierra 2500HD SLT. Just changed right exhaust manifold and gonna do left soon. Changed all pumps (power steering, water, fuel) except for oil pump over the years. My transmission went at about 210k but I tow a boat recreationally for 6 months every year. I love this truck!