What is the stock rear and front gear ratio for a 2005 GMC Sierra 2500HD truck?

[Professional Hitman]

I want to know what the rear wheel gear ratio and front wheel gear ratio is for my truck. I'm using a chip programmer and I need to know.
10 points to the first true answerer.

 

[Molson02536]

Look in your glove box for the PRO codes.

Here are the Pro code for the rear ends to your Sierra
GQ1 -- AXLE REAR, STD RATIO
GT4 -- AXLE REAR, 3.73 RATIO
GT5 -- AXLE REAR, 4.10 RATIO
GU4 -- AXLE REAR, 3.08 RATIO
GU5 -- AXLE REAR, 3.23 RATIO
GU6 -- AXLE REAR, 3.42 RATIO
G80 -- AXLE REAR, LIMITED SLIP (POSI TRACTION)

HC4 -- AXLE REAR, 4.56 RATIO

Open Your glove box and look inside it. Should be a list of codes on the bottom.
Example: GU6 G80 According to that, you'll have a 3.42 posi