My 64 4000 didn't come with hazards.
Search for "flarestat". The ones with "GMC" seem to go higher than others, but expect to pay $60-100 for a good one. I've been watching ebay for 2 years for a good one at a decent price. They have 2 connectors. Simply unplug a connector under the dash and plug the Flarestat in line.
If you buy one, make sure it was unplugged and not cut! If it was cut, you'll have to splice the wires.
Last edited by ScottGMC40001964; 07/02/2010 10:59 PM.
