Without having the VIN to your truck I cant see what options your truck was built with but with a 5.7 truck there is a speed control servo mounted under the battery. If you remove the left inner fender you will see the servo. Check the electrical connector to make sure a previous battery didn't leak all over it and damage the connector or wiring. It looks like your truck has AWAL ABS, or All Wheel Anti-Lock Brakes so the left and right front wheel hubs will have a speed sensor and they can cause problems if the hub bearings have failed or the sensors have failed so there is a few things to inspect. Make sure the hub bearings are tight and the speed sensors are plugged in to their corresponding electrical connectors and are mounted properly to the hubs.
After looking over the wiring diagram for your truck the ABS Module sends the speed sensor signal straight to the PCM. There is also a vehicle speed sensor signal that is sent from the TCM to the PCM.
Well here we are almost a year later and my Cruise control issue persists. My VIN is 3D7KA26D53G783673.. I have an electronic cruise and not the vacuum operated variety.
The activation switches on the steering wheel work properly and show continuity when pressed. I tested to see if temperature or humidity affected the operation and that bore no results. I can only assume the problem lies within the ECM and I have no problem removing it for repair but would like to know I'm going in the right direction.
Last year I replaced both front wheel hubs and bearings due to wear. Standard 2 dr cab, 2 WD, long box. Everything came out and went back in very smoothly. The truck had only one previous owner, no damage what-so-ever and lived most of its life in Arizona. Has 150K miles and runs smoothly. Transmission does not have any issues. Vehicle is maintained by me regularly.
