As one of the VERY few D/A owners who let their truck sit for any length of time, I was surprised to find it wouldn't "go" after a week of sitting. Forum searching found a TCB covering this, so armed with that info I went to the local dealer.

Surprise again: GM is now allowing dealerships to make some repairs. Mine was a first for the dealership so I know they were extra careful.

I just wonder how many owners have the weak spring problem and are totally unaware of the warranty fix, simply because they use their ride constantly? From what I understand, it only affects early Allisons (mine is a 2001) but it might behoove early owners to bite the bullet and let their truck sit for 7-10 days. Hey, it's a free flush and service if you have the problem and the warranty ends at 36 months.

Oh, and yes the dealership did a fine job the first visit. Three surprises in a row.