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t I am sure this will be the first of many stupid questions, but here it goes....What is the high idle kit and what does it do for performance.Have been driving diesels my whole life and am just now finding out you can really make these suckers MOVE!!!!:ro) Any awnsers would be great
 

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High idle is used to warm the Vehicle up faster.

What year is your truck and what motor do you have? LLY or LB7?

If you don't know, check your serial # if the 8th digit is a 1 you have an LB7 if it is a 2 it is an LLY.
 
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