View Poll Results: silverado shuts off and on at hwy speed
reolaced VSS on tanny
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replaced wheel speed senser
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what could cause this
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silverado shuts off and on at hwy speed
CF Veteran
Joined: May 2011
Posts: 1,578
Likes: 302
From: Central Iowa
There’s several possibilities for the cause, but the most likely is a weak/intermittent electrical connection.
While letting it idle, wiggle test the wiring harness in the engine bay and under the driver side of the dash. Focus specifically on the areas near the ECM and BCM, as well as the steering column and ignition switch.
Then move on to the harness along the frame rail to the ABS module and fuel tank.
If wiggling one area of the harness reproduces the issue, remove the looming and tape for closer inspection.
You may need a helper to watch the IPC as you test the harness.
While letting it idle, wiggle test the wiring harness in the engine bay and under the driver side of the dash. Focus specifically on the areas near the ECM and BCM, as well as the steering column and ignition switch.
Then move on to the harness along the frame rail to the ABS module and fuel tank.
If wiggling one area of the harness reproduces the issue, remove the looming and tape for closer inspection.
You may need a helper to watch the IPC as you test the harness.
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