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After driving an hour,my truck will not start.After waiting 20/30 minutes it will.Some times I can disconnected/reconnectedthe Battery and it starts sooner.The bazaar thing it will start the rest of the day,rarely will it do this on the same journey.I went to a heavy duty starter,no help.I only use the vehicle once or twice a month.The a/c does not work.If the battery is disconnected/reconnected it might work 1 hour or ten minutes,Yesterday I tried changing relays under the dash,it has been working since.The speedometer does not work,until I travel at least 50 mph a few minutes.
92 Silverado 4x4 350 auto 160,K miles.
--Thank you--

 

I surrendered,and put a start button in my cab.The high torque starter cals for 800 + ,but only have a 650 battery.I will put a stronger one in,but with my button,it starts immediately with no drag.Someone has got to have a solution,and my A/C continues to work.Before the button,and going through the ritual of disconnecting the batt,it stopped but now it works...

I have been dealing with this 4+ years.Any help will be sincerely appreciated

David..
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