Greetings all! I am at a '94 C2500 to buy. I have't seen the truck...I'm out of town...but Dad drove it a little bit ago. He said it all checked out fine (Dad's an old mechanic) except for an odd clicking noise when you turn the key on and it does it again when you turn it off. Turn key to power on...click click.click for a few seconds, then it stops. Same when key is switched off. Starts fine...like and good 350 should...think about the starter and she fires right up. Drives and accelerates good. No hesitations. Trans kick-down may need adjusting. He says it has a slight hesitation when you stomp on it. A/C does not work. Wondering if the pump is seized and the solenoid is trying to kick in and making the clicking noise. All I know about the truck: 1994 C2500, 180k miles. Surplus Forest Service truck. 350 engine/auto trans. No codes or dash warning lights. All fluids look good and all guages read normal. PVC is broken and needs to be replaced. No oil drips, just normal seepage on the valve covers. No lifter ticks or odd engine noises. CLicking starts at power on, lasts maybe five seconds, then stops until the engine is turned off. Starts fine cold or hot. Just looking for opinions and ideas. Like I said, I havent seen the truck nor have I agreed to buy it yet, just looking at possibilities. Thanks all!