04 Z71, Engine getting tired at 253K miles

[95escahoe]

Noticeable power difference between it & 5.3?

I've got an 03 Silverado with the 5.3 and a 04 Escalade 6.0 (LQ9) there is a difference with the 6.0 it accelerates a lil quicker gets slightly better mpg, and the 6.0 has 60hp more if I recall correctly, love the stock exhaust note too


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[Epik]

I've got an 03 Silverado with the 5.3 and a 04 Escalade 6.0 (LQ9) there is a difference with the 6.0 it accelerates a lil quicker gets slightly better mpg, and the 6.0 has 60hp more if I recall correctly, love the stock exhaust note too


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It's been a long time since I've driven a 6.0 (I test drove a Denali once), so I won't have much to compare it to, but either way, I think I will be happy with the 6.0.

 

[95escahoe]

It's been a long time since I've driven a 6.0 (I test drove a Denali once), so I won't have much to compare it to, but either way, I think I will be happy with the 6.0.

You'll like it, just remember due to the high compression 10:01 you'll need to run 91 or higher


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[Epik]

You'll like it, just remember due to the high compression 10:01 you'll need to run 91 or higher


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Yeah, I figured. I have to do so with my CTSV, so no biggie.

 

[95escahoe]

Yeah, I figured. I have to do so with my CTSV, so no biggie.

What year CTSV?


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[Epik]

What year CTSV?


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2005. It has a cam, full B&B exhaust, & a tune, & it made 418rwhp/393rwtq. Pretty fun car for a sedan. I've had it since 2011.

 

[95escahoe]

2005. It has a cam, full B&B exhaust, & a tune, & it made 418rwhp/393rwtq. Pretty fun car for a sedan. I've had it since 2011.

Very nice I've always liked those


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[ali saleh]

Try 20w50 oil with 1 lucas next oil change and get another 50k miles guarantee

 

[mattt]

Noticeable power difference between it & 5.3?

Noticeable mileage difference between the 5.3 and 6.0? I know my old '01 2500HD with an LQ4 6.0 was no mileage queen at 13mpg. I've always heard the 6.0's are thirsty regardless of what vehicle they're in.

Funny I stumbled onto this thread.....my 04 Z71 Tahoe has 238k and in the last few months I've noticed a white cloud at startup too. Not every start up, maybe 1 out of every 25 startups. Happy to have found this thread with the info I was seeking, thanks.

 

[95escahoe]

Noticeable mileage difference between the 5.3 and 6.0? I know my old '01 2500HD with an LQ4 6.0 was no mileage queen at 13mpg. I've always heard the 6.0's are thirsty regardless of what vehicle they're in.

Funny I stumbled onto this thread.....my 04 Z71 Tahoe has 238k and in the last few months I've noticed a white cloud at startup too. Not every start up, maybe 1 out of every 25 startups. Happy to have found this thread with the info I was seeking, thanks.

The highest I ever got was 14.6 in my 6.0 Escalade, not great but good for what it is

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