Re: My New 03 1500HD
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.
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