So far I really like this truck. Mileage hand figured is running around 18mpg. Twice I have had my check engine light come on but went off two days later. On the 06's you cannot get the code yourself is my understanding. Plenty of power and I like the tranny other than I wish it was a 7spd. I am thinking about a replacement air filter that fits in the original spot. I have bored the bottom of the filter housing. With the silencer removed I can hear the turbo a little more and it is like music. Did the tone ring also. I figure when spring get's here I have a real shot of getting 20mpg if I drive easy. Have not done much towing as of late as the snow and ice has pretty much melted this week. Snowmobiles are just sitting there collecting dust. Jim

 

I had a check engine light on my truck a while back and thought that I was doing something wrong - the on-off-three-times thing didn't display anything for me. The dealership couldn't make it work either. Does anyone else know if they've disabled this for '06?

 

No problems at all for me...21mpg highway, 15mpg normal driving when its cold out...This tank I'm around 18 with highway, city, and some towing

 

went 133 miles on 6.3 gallons = 21 mpg, driving 60 mph for 80 of those miles and the rest at no more than 25 mph on gravel roads. (we were hunting). I also filled up at the same pump, filling both times to the brim. My truck is a 06 q/c 4x4 ctd lb w/1100 miles on it. I have removed the baffles out of the air box tube and also removed silenser ring at the turbo. Rokktech sensor set at 1* advance. All tires set at 50 psi. Everything else stock. I also run power service (white) w/ MMO at a 4-1 ratio. I put in 3 ounces to every 9 gallons of fuel. After reading how bad the 06 gets fuel economy. I am very happy with my 06.

 

I can check the codes on my 06. Be sure to turn it to acc, then from acc to on 3 times, they'll come up

 

Averaging 15.5 to 16.5 at 4K. I haven't seen interstate numbers like the above.