[dechief4]

Greetings all -

I have a 2004 DHS. Does anyone know:
1) if the DHS's have 'adaptive engine learning'? In other words, will the PCM eventually figure out how you drive and then set itself appropriately for your apparent driving style (for example, go into 'granny mode' if you usually drive sedately, seemingly reducing acceleration response, etc.)?
2) If 'yes' to above, how does one reset it to 'factory' mode?

Thanks!

 

[Ranger]

Nope. Never heard of anything like that. Drive it like a granny if you want, but when you need or want the power, it will be available.

 

[dechief4]

I agree the power is there - it just takes a lllooonnnggg push on the accelerator to get the car to drop down into a lower gear for more rapid acceleration (for example, at about 40 MPH, I've got to depress the pedal seemingly to 3/4 open to get it to downshift). A longer push than I am used to on any of my other cars - which is why I thought it may have programmed itself into 'granny mode'. Other cars I've had (and have) do the adaptive driving thing with the PCM and can be reset.

 

[Submariner409]

Nope, no Granny Mode. Take the car out to:

1. A big parking lot at a ball field or such and get used to slow, torturous driving. Brakes and turns.
2. The country. Twisty roads, starts, stops, acceleration to WTF and panic stops. Don't be afraid to stick it in 2 and put your foot through the firewall. At 6200 rpm after the 1-2 shift, flip your foot off the gas pedal and let the engine pull the car down to 20 mph and do it again. (If you miss the 6200 rpm decel, don't sweat it: the transmission will upshift to 3 and then decelerate the car....it will not let you break anything.)

Read the entire Cadillac Technical Archive up in the black bar ^^^ tonight, after dinner.

The transmission is a dry sump unit: there will be NO fluid on the stick with the engine off. Check with everything hot, running, in P. Bring the fluid no higher than halfway up the dipstick hashmark.

Likewise, check the engine oil hot, engine off for 5 minutes, and never bring it up more than halfway up the hashmark. That is the 7.5 quart mark. GM specifically states NOT to carry the oil at the MAX mark.

 

[Chadillac182]

Ok, just a quick question here... I have a 2002 Base Deville, should it be shifting at 6200 RPM???

-Chad.

 

[Submariner409]

Yep.....depending on tach response and/or overshoot you'll see 6200 - 6350.

Put the car in 2 and stick your foot in the firewall. Let it run up, shift to 2, and continue on up if you can. It will shift to 3 automatically at redline. Let the engine pull the car back down to 20 mph.

Read the entire Cadillac Technical Archive up in the black bar.....especially the article "Occasional full throttle operation is good for your engine....." oir something like that.......

 

[dechief4]

Submariner -

Thanks for the reply and info. The DHS isn't my first North* Caddy, but is my first Deville-type. I actually inherited it from my dad. Very nice car - but big. Takes some getting used to and some time to learn how it's supposed to function.

Thanks again!