I just picked up an '05 Buick Rainier 5.3l and I was intending to better utilize the dod feature, but I pulled the stock tune and dod is disabled. Truck gets pretty bad fuel economy. At 70mph I'm getting about 18.5mpg.
I have an E40 controller and LH6 engine rpo. I was under the impression the LH6 had the dod feature. Is there a chance I do not have dod capability? I haven't logged anything yet. How do I know if I am in V4 mode?
*Edit
Ok found this on trailvoy:
"The exhaust system for the Gen IV Vortec 5300 required careful tuning to maintain optimal noise and vibration control. In four-cylinder operation, the engine creates second-order exhaust pulses; in eight-cylinder operation, it creates fourth-order exhaust pulses. The system requires special pipe tuning to account for both. Mitigating features for short-wheelbase vehicles are still in development. As a result, Displacement on Demand will be disabled via calibration in the Buick Rainier, Envoy Denali and Saab 9-7."
And it appears there is a status bit to log as well...but regardless I should know by the sound I guess. So it appears I have the hardware to do this? Does is really sound that bad?
I'll log this after work.