2003 Chevrolet Trailblazer code 1275 an1280

2003 CHEVROLET TRAILBLAZER
171,000 MILES • 4.2L • 6 CYL • 4WD • AUTOMATIC
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COLTONSCOUT
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the car turn over but won,t start. i replace the following. fuel pump ,filter, fuel reg,new throttle body, cam& crank sensors,cam syn sensor, key switch,igintion box,throttle pedal,6 power pack units,(2) oxy sensors, rebuilt ecm. the check engine light an low power light stays on an the car won,t start at all.
Dec 6, 2015 at 11:53 AM
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HMAC300
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your original problem was probably because the security system engaged. but since you've replaced all those parts you now need a local pro with a good scanner to program security into ecm and ignition switch before it will start. these all have to match up before anything especially ignition switch and ecm are replaced. All vehicles since about 1997 or so have had security systems installed to stop vehicle theft and they occasionally screw up or when a battery is run down or replaced causes the same thing. but having it programmed now is the only option to get it running. oh and make sure you tell the mechanic what you have replaced so he'll know
Dec 6, 2015 at 12:27 PM
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HMAC300
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  • 48,601 POSTS
sorry forgot about the codes both of those refer to accelerator pedal circuits. but get it running first then reset the codes and see if they come back
Dec 6, 2015 at 12:29 PM
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