wow I feel so foolish
I have driven my 2003 in auto 4x4 on the e way and in the city for 230,000 miles without replacing the front dif.
not in summer unless heavy rain, but for sure from the beginning of november til may.
no problems and no noises
maybe I should have the dif replaced anyway.
I had a similar problem with my 2003 slt and took it to a shop where they replaced valves and compressor with no joy.
They said they were stumped and could not fix it so no charge.
I did find a youtube that showed an AMBIANT OUTSIDE AIR TEMPERATURE SWITCH located behind the right hand head light...
you could contact Black Bear here
you have hptuners, you might do a salibration lookup on your home page for 2014 silverado 6.2 w/automatic
it shoud get yo close to a stock calibration, you will need to adjust it some for your denali but it will be very close to what you need
if I remember right
the fuel pump needs to see a minimum oil pressure to energize
maybe you need to see if there is a pressure problem or a bad sending unit not passing required minimum for
fuel pump ok to run
smoothed out the VE table and increased it for performance
increased the timing tables by at least 7 degrees and more at 1000 to 4000 rpm ranges, some more or less depending on vehicle performance
pulled back on the knock retard tables and adders, still active just selected ranges
I don't normally condone something like this since there always seems to be an ass bite back
Since the Gas prices are up and so is everything else
I am sharing a HP TUNERS template from my 5.3 l 2003 Yukon that has been running around 24mpg hwy and 20 or so city
USE AT YOUR OWN RISK
USE AT YOUR...
contact a good tuner, check the search option here, BB still around?
you should be able to pull up your mileage with a proper tune or check out hptuners or efilive and get input on their forums.
learn to tune your own and you get to eat the fish you catch if you know what I mean.
yup you will...
if water entered the tank thru the rusted inlet you may be fighting that, water at the fuel pick up screen on the pump, the water will stop gas flowing thru the filter screen- personal expierience here.
the ecu controls fuel and spark as well as other functions. i replaced mine after not...
In the old days we would put a can of CD2 additive in the oil to clean blocked passages and quit lifter noise. Then change the oil after 200 miles of driving-- at least 30 minutes each time. Sseem to work wonders for low oil pressure due to blockages and quiet load lifters.
just a suggestion...
I do think that your quest is headed in a divergent direction..
having said that my reasoning is backed by some trial and error on my own vehicle.
The added controls from the steering wheel are to the instrument cluster and not thru the bcm.
I picked up several clusters from a local scrap yard...
Check the hpt website, there is a mod to use the egr or other circuit to attach and log a wide band without the pro set.
I have been using the standard unit for 10 yrs or more and never found the need for the added pro functions, unless you are into competition.
I did try this in the past for my yukon and came up with an invalid vin match for the vehicle which did not allow for any updating. It dod rewrite the ecm with the new vin and I had to change the vin back with hptuners to get back to proper operation, caused some other modules to not work...