My cousin has a 2018 Summit and just put on the HD Diesel Supply tune. He said it greatly reduces the turbo lag and makes the JGC run smoother. Too early to say on mileage improvements, but so far seems a lot like the GDE tune he had on his previous Jeep. NExt time I talk with him I'll get an update and post it. He remnded me that the folks at HD Diesel were very easy to work with.Hey all!
Missed buying a GDE tune by about a month. After searching the Ram forums I came across a tune for the eco diesel grand Cherokee by HD Diesel supply. Is anyone running this tune in their JGC? What are your thoughts?
My cousin has a 2018 Summit and just put on the HD Diesel Supply tune. He said it greatly reduces the turbo lag and makes the JGC run smoother.With only a couple of tanks of fuel, he is seeing a 4 to 5 mpg improvement. So far he says it seems to be almost identical to the GDE tune he had previously in an older JGC. No problems, only a better running JGC.I just ordered from HD. Due to supply/demand, shipping is delayed 2-3 weeks. Seems like everyone is realizing they are the best option these days with GDE out. It is a decent package since it comes with the needed exhaust pipe. I also like that I don't have to pull my ECM, send it out and wait (with my JGC out of commission) until it's reprogrammed and I reinstall. Hopefully I can do the entire install/delete myself.