Question about 2003 Chevrolet Silverado 2500HD
How do i determine the real axle ratio. I also need to change it, front and rear (4x4). Duramax Diesel 6.6 HD 2003
I am thinking it is a 4:11 and i need to raise the fuel milage on the truck. I am also wanting to know what ratio's are avaliable .
The build sheet codes are affixed inside the glove box
It will have the letter G with two numbers after it as like G80. Some may have two letters and one number but unlikely so
The G code will determine the ratio of yours without ripping off the rear cover to count the teeth and divide what you have
Posted on May 31, 2010
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Posted on Jan 02, 2017
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