Could be the starter relay but , could also be the park neutral safety switch , test by moving the gear selector to neutral . If it starts then more then likely the PNP switch is bad . Viewing wiring diagrams to see what all is involved in starter operation . Reading factory service info. for starter operation would be good too . The engine computer (PCM/ECM) probably energizes the starter relay . Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine . Under system click on engine , then under subsystem click on starting . Click the search button , then the blue link . Looking at the wiring diagram it just so happens there is no starter relay . Ignition switch sends battery voltage through the PNP directly to the starter solenoid . Could be the main battery cable , voltage drop testing will show if that is the problem .
Starter Voltage Drop
SOURCE: I got a new ignition starter relay and starter but my car still won't
yes it has anti theft check in your owners manual on how to reset
SOURCE: 2003 chevy malibu won't start and seems to be with the fuel pump
Try this I got it from the emission wiz
Put your key in turn it on dont start wait 10 mins remove key wait 10 seconds repeat this a total of 3 times. If that dont work try a different key do the same thing. This relearns your key to the ignition it started with Gm cars and trucks from 1999 to to 2006. It is a big problem but there is no recall that I know of. If that dont work a dealer needs to probably replace and reprogram your ignition switch and keys
SOURCE: theft system passlock on 2003 chevy malibu. theft
yr gonna have to get the passlock key and punch it into the radio so u can solve ur problem most chevy dealships can assist you with that.
SOURCE: i have 2003 cad cts mt new battery,new starter
does the vehicle have an anti theft device on it if so it may need to be reset. usually all you have to do is unlpug the negative batt cable. for about 5 mins.and reconnect it. if this does not solve the problem look i the owners manual to see how to override the system.
SOURCE: 2003 chevy malibu won't start and seems to be with the fuel pump
first access the ignition switch through the center part of the dash where the radio and climate control are. then locate a thin yellow wire attached to the ignition switch. start your car. then cut the wire. varify the car starts again then tape up the wire you cut put everything back together and there you go.
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