No electrical power
0
12
2001 Sierra, when I turn to key over theres absolutely no power, this morning I wiggled some alternator to battery wires and started right up. Went to the gas station and now wont budge. I checked the terminals, they are tight. Could this be a wiring issue? Its been hovering in the single digits temp wise for the last several days. Was running fine until it got this cold. Any advice is well appreciated.