PCM control ABS / module? drum->disc

**PitchBlackC3** · 08-23-2010 12:05 PM

The PCM doesn't care if you have brakes at all.
There is a screw in proportioning valve on those units. You might be able to just switch that between the 2.

**gottaswapup** · 08-25-2010 03:15 PM

Thank you!

**gottaswapup** · 02-14-2011 07:37 PM

So I just re-installed the '06 Sierra's PCM, which I just had tuned by www.gmtuners.com.
The test-drive was too short to check the gas mileage, since I only went about 9 miles.
But this is the best $85 investment possible.
The previous tuner left the shifting a disaster, with NO WOT up-shifts at all. And it was cruising
enriched rather than in closed-loop.
Plus the part-throttle 1-2 shifting was very harsh.
All that, for $75
Well, Ryan wiped that, loaded the latest updated stock tune from GM, then adjusted everything
as per my requests. Very professional, excellent customer service.
You read this a lot, but in this case it's true: This is exactly how the truck should have been built
on GM's assembly line. It now drives exactly how a new one would if the 4.10:1 axle ratio was a
factory option.