What is the best ECM programmer? Hypertech? Diablo? JET?
Had this posted on the GMC forum but either no one owns GMC's or we don't know... Maybe the chevy guys can answer.

 

really depends on who you ask. Each have different options, but in the end are all pretty similar. What you really should do is get your computer reprogramed. This will net you alot more performance for about the same cost. Also you have alot more adjustments you can chose.

 

How do you go about geeting the ECM reprogrammed? Is that something that can be done at home with a laptop or is thei s a specialty service?

 

Go to PCMperformance.com.
I have worked with these guys and the are great and know their stuff.

Bill