6.0 vs. 6.0HO

[bobby5]

I was lookin on chevys website and they have 2 6.0's listed. A regular 6.0 and a 6.0 HO. Is the 6.0 HO a special option cause it says it has 45 more horsepower and 20 more ft/lbs of torque. I looked in my glovebox and found out mine has the regular 6.0 with a LQ4. How many of you have a 6.0 HO, its code is LQ9?

[MrQuadrasteer]

LQ9's come in SS and VHO trucks.

[Bgdsub72]

yep, the 6.0 HO is only found in the Silverado SS, AWD Escalade and Denali. It can be ordered in the ecsb silverado as a special order. I almost bought one of these truck at a dealer out here in CA. It was a spiral grey LT truck with the factory 20's and sport suspension with the 6.0HO....almost like a 2wd SS pretty cool but I wanted 4 doors...

[Truckman031]

I think those 6.0HO pickups are only available in a few states, right?

[Bgdsub72]

I believe so. The one I was looking at was called the California Performance package with the sport suspension, ugly 20" wheels, LT interior, and the 6.0L HO

[jeb]

The HO is also in the 3/4 ton Suburban/Yukon XL. I have the motor in my 04 Yukon XL 2500. It has good zip, that's for sure.

[Mattt]

What exactly is the difference between the two 6.0s?

 

How does GM get additional power from the HO?

 

Can these changes be made to a std. 6.0 to make it into a 6.0HO?

 

I had a friend that worked at a dealer a few years ago, and he claimed it was different heads & cam. Is he correct?

[Chevyfreek]

What exactly is the difference between the two 6.0s? 

 

How does GM get additional power from the HO?

 

Can these changes be made to a std. 6.0 to make it into a 6.0HO?

 

I had a friend that worked at a dealer a few years ago, and he claimed it was different heads & cam.  Is he correct?

 

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From what I understand the difference mechanically is small, just different pistons for a bit more compression. The rest is all in the how the PCM (Computer) for the vehicle is tuned. A custom performance tune would give you an additional jump in HP & TQ if you are looking for more power out of your 6.0L. I run a Westers custom tune on my truck and I am happy to be rid of the mild factory tuning...

[BRUTONMOTORSPORTZ]

The HO is also in the 3/4 ton Suburban/Yukon XL. I have the motor in my 04 Yukon XL 2500. It has good zip, that's for sure.

 

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Check your RPO codes in your glove box. I bet you have the LQ4 and not the LQ9 HO. The 2500 Burbs with the LQ4 6.0 are rated at 320HP as opposed to the LQ4 6.0 300HP in the 2500 trucks. The Denalis also got the LQ4 320HP up until 2004. The Denalis now get the 345HP LQ9 6.0.

 

I have a LQ9 in my VHO truck and a LQ4 in my 2500 Crew Cab.

[jeb]

Check your RPO codes in your glove box. I bet you have the LQ4 and not the LQ9 HO. The 2500 Burbs with the LQ4 6.0 are rated at 320HP as opposed to the LQ4 6.0  300HP in the 2500 trucks. The Denalis also got the LQ4 320HP up until 2004. The Denalis now get the 345HP LQ9 6.0.

 

I have a LQ9 in my VHO truck and a LQ4 in my 2500 Crew Cab.

 

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Yes, you're correct, it's the LQ4 motor. So I guess it's not the High Output but rather the Higher Output (but not as high as the HO)? Seems the 6.0 is available in several output versions. You'd think they'd give them different designations. The GMC website lists the 6.0 at 335hp for the Yukon XL 2500, for example, but that's apparently not the official HO version.

 

Whatever the case is, the "higher" output 6.0 in my 2500 YXL is a pretty peppy motor and I'm glad I have it.

[BRUTONMOTORSPORTZ]

I noticed they raised it to 335hp for 2005 on the LQ4 in the applications other then the 2500 Silverados/Sierras. I believe in the past years it was 320HP or 325HP for anything other then the Silverados/Sierras.

[Mattt]

Does the LQ4 6.0 have aluminum or iron heads? Why wouldnt they offer the higher HP engine in the trucks?

[Chevy Tough]

The new 6.0's found in the Three Quarter ton Suburbans and Yukons XL are rated at 335 Horsepower 375 ft lbs of Torque, it says so in my CD that came with my brochure i got from Chevy. Chevy should put this engine in 2500 HD trucks in my opinion!

[BRUTONMOTORSPORTZ]

Supporting the Sierra Crew Cab Denali’s professional grade capabilities is the powerful Vortec 6000 6.0L High Output V-8 LQ9 engine. The LQ9 produces 345 horsepower (257 kw) and 380 lb.-ft. (525 Nm) of torque. It’s more powerful than any engine previously offered in a Denali model and boasts numerous technological innovations, including electronic throttle control, which does away with the traditional mechanical link between the gas pedal and engine throttle to deliver crisp, more immediate throttle response.

 

The Denali Crew Cab gets the LQ9 and the Yukon Denali and Denali XL keep the LQ4.

 

Yukon Denali and Yukon XL Denali’s Vortec 6000 6.0L V-8 (LQ4) engine also receives an increase in horsepower and torque, thanks to new, improved-flow cylinder heads and optimized fuel and spark calibrations. Also, the addition of dual electric cooling fans reduces engine drag compared to an engine-mounted fan. Horsepower jumps from 325 (242 kw) to 335 (250 kw) and torque increases from 365 lb.-ft. (495 Nm) to 375 lb.-ft. (508 Nm).

 

The below information pertains to the Yukon XL 2500 and the Chevrolet 2500 Burbs.

 

Engines

Vortec 6000 (LQ4)

 

Type:

6.0L V-8

 

Displacement (cu in / cc):

364 / 5967

 

Horsepower (hp / kw @ rpm):

 

325 / 242 @5200 RPMs

 

Torque (lb-ft / Nm @ rpm):

 

365 / 495 @4000 RPMs

 

The below pertains to the 1500HD Crews and the 2500HD Silverados/Sierras

 

The Vortec 6000 6.0L V-8 produces 300 hp (224 kw) and 360 lb.-ft. (488 Nm) of torque. LQ4

 

I found all of this info on the GM Media site if anyone wants to check it out. This all pertains to the 2005 Model year.

 

http://media.gm.com

[jeb]

The below information pertains to the  Yukon XL 2500 and the Chevrolet 2500 Burbs.

 

Engines

  Vortec 6000 (LQ4)

 

Type:

  6.0L V-8

 

Displacement (cu in / cc):

364 / 5967

 

Horsepower (hp / kw @ rpm):

 

325 / 242 @5200 RPMs

 

Torque (lb-ft / Nm @ rpm):

 

365 / 495  @4000 RPMs

 

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Not according to the GMC Website:

Yukon XL 3/4-Ton

MSRP $41,380 - $49,160^

 

A choice of powerful engines, including, Vortec 6000 V8 with 335 hp and 375 lb-ft torque