1996 chevy c1500

I have a Chevy c1500 with a 4.3 engine. I installed a audiovox ccs100 cruise which I have never gotten to work. Has anyone successfully installed one of these on this truck? If so, HELP

Describe how you have hooked the unit up. Have you checked all the electrical connections with a digital volt/ohm meter? What are your DIP switch settings? The cruise should work fine on that truck.sparky

I have tried all different ways to set the switches. I can get it to work on tach only, but as an automatic, it doesn't hold speed on hills. I have tried the speed sensor wires at both the PCM and empty cruise plug. When on vss, it doesn't even try to engage.

Use a volt meter on the VSS wire to test it. Set your meter for A/C voltage and ground one test lead. Connect the other lead to the VSS wire. Move the car about 50 feet and see if you receive a change in the meter reading. If not, you have a problem in the VSS circuit or are on the wrong wire. The wire should be GREEN / WHITE and is a 4000 PPM signal. If you change any of your DIP switches, you must unplug the electrical plug from the cruise for the changes to register. If your vehicle loses more than 5 mph up a hill, you have too much slack in your cruise throttle cable. The cable should be tight, but not so it won't allow the gas pedal to return to idle. If you use your hand to pull back the throttle cables with the engine off, you should hear a slight click when you let go as the throttle assembly hits the idle set screw. You should also check your vacuum source. If it is possible, use or install a vacuum port right off the intake manifold. Many of these trucks had one capped off. If not, there was usually a threaded steel plug you could remove to install a metal vacuum port. The only other good alternative is to use a very large T-tap into the vacuum line going to the brake booster. You will need a special vacuum Tee to make it work and seal correctly. The ones in the kit are usually a little too small.sparky