I have been researching Diesel tunes for my 2005 Duramax for a long time, lots of options on the internet. Couple of months ago, stopped into Randy's and spoke with Mark who was knowledgeable and understood my wish for mileage and performance gains with towing an RV trailer. Dropped in again about 3 weeks ago and had EFI Live installed, Mark had some programming issues on install with OnStar but was successful. Very happy with results, immediately saw a 6-8 mpg increase with hwy driving and just got back from a RV trip to the coast and with towing saw the same increase with much better performance. Randy's crew was professional and friendly with no pressure, appreciated their service. 5 stars here!
All USA
I have been researching Diesel tunes for my 2005 Duramax for a long time, lots of options on the internet. Couple of months ago, stopped into Randy's and spoke with Mark who was knowledgeable and understood my wish for mileage and performance gains with towing an RV trailer. Dropped in again about 3 weeks ago and had EFI Live installed, Mark had some programming issues on install with OnStar but was successful. Very happy with results, immediately saw a 6-8 mpg increase with hwy driving and just got back from a RV trip to the coast and with towing saw the same increase with much better performance. Randy's crew was professional and friendly with no pressure, appreciated their service. 5 stars here!