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Old 08-09-2010, 09:58 AM   #17
ChevyTech
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Join Date: May 2004
Location: Minnesota
Posts: 4,621
Re: Using an electronic speedo with TBI and 700R4?

Great photo of the DRAC jumpers mcbassin.

This looks to me to be a DRAC from a vehicle with a 3.42 axle ratio and P225/75R15 tires.

A 3.42 axle ratio would have an RPO code of GU6

If you find out what axle ratio the truck has, or get me the PRO code from the truck, I can tell you which jumpers to change.
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For those of you that are wondering why you are not getting replies to your thread:
Did you give the model, year, engine, fuel system type, and transmission information?
If it is modified from what came stock from the factory, let us know that too.
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