Question about Cars & Trucks
Do yourself a favor an have it towed to a qualified repair shop. You probably have no idea how this vehicles systems work . When you turn the key to start , the ignition switch is not directly connected to the starter solenoid .This vehicles ignition switch is a low voltage input to the BCM - body control module , the BCM sends a message over the GMLAN serial data network to the PCM - powertrain control module to start the engine . Any number of thing's can interupt that message causing a no start condition. The BCM - is what is called the PMM - power mode master , when it see's any input from the ignition switch - off / ACC/ run crank etc... it sets the power mode . It will energize relays turning thing's on or off . Welcome to the world of electronics .
When the ignition switch is turned to the Start position, the body control module (BCM) receives battery voltage on the ignition 1 voltage circuit, and less than 5 volts on the off/run/crank voltage circuit. The BCM supplies voltage to energize the RUN/CRANK Relay 32. The BCM sends a high speed GMLAN serial data message to the engine control module (ECM) that the key is in the start position. The ECM receives the message from the BCM, and also receives a serial data message from the transmission control module (TCM) containing the shift lever position. If the shift lever is in Park or Neutral when ignition switch is turned to Start, the ECM supplies voltage to the START Relay 31. The START relay supplies voltage to the S terminal of the starter solenoid, through the 30 A STRTR Fuse 26, in order to crank the engine.
Power to many of this vehicle's circuits are controlled by the module that is designated the power mode master (PMM). This vehicle's PMM is the body control module (BCM). The PMM controls which power mode (Run, Accessory, Crank, Retained Accessory Power, or Off) is active.
Serial Data Power Mode Master
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle, the PMM is the body control module (BCM). The PMM receives 3 discrete ignition switch signals to differentiate which power mode will be sent over the Serial Data circuits. The 3-wire Ignition Switch table below illustrates the state of these inputs in correspondence to the ignition switch position
Posted on Sep 12, 2019
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Posted on Jan 02, 2017
SOURCE: power sttering loss
its possible this is electric, if you have an owners manual that will tell you, or call your local chevy dealership parts department, give them the vehicle identification number and they can answer it.
if its electric, most likely the fuse blew.
Posted on Oct 13, 2009
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