Originally Posted by GaryanJane
we have a 2009 silverado 3500hd xlr dually. i always use tow mode when pulling our 5er. my question is how do you engage or use the exhaust brake ?
Gary I can't remember for sure but 09 "I think 10 was first year" didn't have an exhaust brake.
However my 08 didn't either but when I had my truck tuned they use the vvt as an exhaust brake.
When I'm in heavy to mode "tune" and in tow mode "shift lever" I build about 8 lbs of boost while braking acting as an exhaust brake.
Clear as mud?
08 duramax tuned n modded, 32bhok Sabre
2015 camping "4 nights"