[69gmcc10]

Update time!

I have almost had this truck an entire month now and I have made several observations about this truck that I think are worth sharing.

1) In town I am getting 11.5 mpg and at interstate speeds 14.3 mpg.

2) There is a sweet spot between 68 and 69 mph where mileage goes up to almost 16.5.

3) The auto climate control in LT trucks robs my truck of about 2 mpg.

I installed the Spectre cold air intake I had from the previous truck (same part for both engines) and I have noticed some top end grunt, but not much of a mileage gain. I was afraid of installing the intake because on my 5.3 and on my dads 2500HD (he has a 03 6.0l) both droned in the cab bad at 2600-2800rpm but so far no drone.

Next I will be installing a Magnaflow muffler and tailpipe in Sept and I will report back.