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Chevrolet Silverado No Start and Stall

Silverado No Start and Stall

Shops are seeing a Chevrolet Silverado No Start and Stall common failure on vehicles with the 5.3L engine. The problem occurs when the vehicle stalls while driving. Then it won’t restart for a while. This Chevrolet Silverado No Start and Stall has all the symptoms of a fuel pump problem, but it’s not.

Silverado no spark and Spark plugs fouled

You may also find that the spark plugs are fouled and there’s no spark after the stall. You may also find properly fuel delivery from the fuel injectors.

Diagnose Chevrolet Silverado No Start and Stall

All 8 ignition coils and the ignition control module receive ground at G102 on the left side of the engine under the exhaust manifold. If this ground is corroded, it will cause misfires and stalling. The stall is from total loss of ground to the ignition control module and the spark plug fouling is due to intermittent ignition coil loss of ground.

silverado ignition wiring diagram

Chevrolet Silverado Wiring Diagram

Perform a voltage drop test on the ground side of the ignition coils. Acceptable voltage drop is no more than 0.30 volts. If you see a higher voltage drop, remove ground G102 and clean the surface and inspect the eye ring for corrosion. Also inspect the crimp.

Cleaning the ground G102 should eliminate the Diagnose Chevrolet Silverado No Start and Stall

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