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Trans model is 8L90, transfer case is a Magna MP3023 and the rear axle is a semi floater with a 9.5" ring gear. I'm pretty sure this info is correct, but I make no promises

On my 2011 Sierra with the 5.3, GM says it makes 315 horsepower and 335 torque on gasoline and 326 horsepower and 348 torque on E85. So according to GM anyway, you make more power on E85. Mileage does indeed suck though.

An engine's compression ratio is what dictates the minimum octane. In higher compression engines, more heat is created in the cylinder and the fuel mixture can ignite before the spark plug fires, known as pre-ignition or knocking. In high performance engines, more timing advance is used to make...

Try checking into consoles for police vehicles. There are consoles for most domestic full size trucks and SUVs due to police, fire and ems use.

I run the Hankook Dynapro AT/M in 275/55R20 on my 2011 Sierra. They are a relatively mild tread, but perform confidently off the pavement. Like most mild all-terrain treads, they pack up quickly in thick, sticky mud. Even though they packed up, they still managed to self clean enough to get me...

If you look around in the current automotive market, there are many vehicles with 8+ speed transmissions. The Silverados and Sierras with the 6.2 come with an 8 speed auto, and the new F-150 Raptor and Camaro ZL1 come with a joint Ford-GM developed 10 speed automatic.

Thanks. I really appreciate your help

Is there any way I could bother you for better pics if where the control arms mount to the frame? I have a 2005 Silverado 1500 I want to do this to and am trying to do as much research as possible before any sparks fly