I'm not sure what the problem is with your truck but I have jump started
tractors and heavy equipment with my 2000 Z71 GMC since it was new [probably
200-300 times] and I have never encountered one problem.
The fuse blew twice in my 2000 Sierra for the horn. Both times after leaning
on the horn to avoid an accident. After reading your post I decided to check
my TOW/HAUL and it isn't working either. If someone has an idea on what
could cause this please reply ASAP.
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