2010 Sierra Denali

nalinc23 · 09-26-2010, 10:21 AM

Hello all, my dad finally traded in his 04 Duramax work truck standard cab for something a little more suited for daily driving, a Sierra Denali. It is white, beautiful, and to be honest I'm pretty jealous. Anyway, just a question for those familiar with the truck:

Does the Denali require premium fuel? Also is the engine the L99 or a different variant of the 6.2 L?

He seems to think regular is fine because it doesn't say anywhere on the gas cap or manual that it requires 92-93 octane. Let me know!

FenwickHockey65 · 09-26-2010, 10:36 AM

As far as I know, it'll run fine on regular unleaded. I haven't seen anything that says it requires premium.

And I don't think it's exactly the L99, but it's a variant of that engine lineup.

Stovall-SS · 09-26-2010, 10:54 AM

My parents have a Cadillac Escalade EXT "or whatever the mdoel is that is the size of the Suberban" with the 6.2L, and the dealer told her to never run anything under 90. I myself dont think it would hurt, but who knows.

okyankee · 09-26-2010, 10:56 AM

i had a 2008 version. it will run on regular but premium is recomended because the computer adjusts tot he lower grade fuel and reduces power. also it makes the motor tick more than normal. when i put in the good stuff the tick went away.

nalinc23 · 09-26-2010, 12:52 PM

Ouch, that won't help the wallet w/ the 12/19 MPG

09-26-2010, 10:21 AM	#1
nalinc23 Drives: 2010 2SS/RS 6MT Join Date: Dec 2009 Location: Savannah, GA Posts: 258	2010 Sierra Denali Hello all, my dad finally traded in his 04 Duramax work truck standard cab for something a little more suited for daily driving, a Sierra Denali. It is white, beautiful, and to be honest I'm pretty jealous. Anyway, just a question for those familiar with the truck: Does the Denali require premium fuel? Also is the engine the L99 or a different variant of the 6.2 L? He seems to think regular is fine because it doesn't say anywhere on the gas cap or manual that it requires 92-93 octane. Let me know! __________________ '10 2SS/RS 6MT, Silver Ice Metallic/Black, CAI Inc Intake, Magnaflow 3'' Catback Exhaust 16483, Llumar 35% Tint, Headlight Armor 20% for Fog/Side/Tail Light Lenses

09-26-2010, 10:36 AM	#2
FenwickHockey65 General Motors Aficionado Drives: 2023 GMC Canyon, 2023 Expedition Join Date: Aug 2008 Location: Florida Posts: 37,375 View My Garage	As far as I know, it'll run fine on regular unleaded. I haven't seen anything that says it requires premium. And I don't think it's exactly the L99, but it's a variant of that engine lineup. __________________ 2023 GMC Canyon Elevation 2023 Ford Expedition SSV (State-Issued)

09-26-2010, 12:52 PM	#5
nalinc23 Drives: 2010 2SS/RS 6MT Join Date: Dec 2009 Location: Savannah, GA Posts: 258	Ouch, that won't help the wallet w/ the 12/19 MPG __________________ '10 2SS/RS 6MT, Silver Ice Metallic/Black, CAI Inc Intake, Magnaflow 3'' Catback Exhaust 16483, Llumar 35% Tint, Headlight Armor 20% for Fog/Side/Tail Light Lenses

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09-26-2010, 10:54 AM	#3
Stovall-SS Drives: 2010 SS RS M6 Join Date: Jul 2010 Location: Goodyear, AZ Posts: 285	My parents have a Cadillac Escalade EXT "or whatever the mdoel is that is the size of the Suberban" with the 6.2L, and the dealer told her to never run anything under 90. I myself dont think it would hurt, but who knows.

09-26-2010, 10:56 AM	#4
okyankee Drives: 2010 SILVERADO Join Date: Jan 2009 Location: Yukon, OK Posts: 347	i had a 2008 version. it will run on regular but premium is recomended because the computer adjusts tot he lower grade fuel and reduces power. also it makes the motor tick more than normal. when i put in the good stuff the tick went away.