No crank no start?

NORM WALKER

MEMBER
2007 CHEVROLET 1500
4.3L
V6
2WD
AUTOMATIC
139,000 MILES

Truck stopped cranking suddenly, then started 1 time, got home and turned off. It hasn't started since. Replaced the battery. Starter and ignition switch. All the dash lights work and radio works. Turn the key to start and nothing. Also, replaced starter fuse I can jump the fuse to make it turn over but there's no firing doesn't even try to start but cranks well.

2 Replies

BORIS K

MECHANIC
787 POSTS

Hello,

I would suggest first carrying out a CAN scan to check for any relevant fault codes stored in ECM, BCM and possible immobilizer system. Also, possible no communication to ECM.

The starter relay is controlled by the ECM, 12V output at pin 71, yellow/black wire, to under-hood fuse block pin C5, see diagram below.

How to carry out CAN scan:
https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Also check relevant fuses in the under-hood fuse block for the ECM, see image 2 attached.

How to check fuses:
https://www.2carpros.com/articles/how-to-check-a-car-fuse

Hope this helps.

Cheers, Boris

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