Is there a mechanic online?

[Cooter]

Does anyone know or could quick look up: 5 blink code on my e-brake light for a 93 GMC Sierra half tonner?

[Jeremy airjer W]

Kelsey-Hayes RWAL System Service Codes:

ABS code 5 - excessive actuation of the dump valve during an anti-lock stop

Thats the only "5" code i could find and it only relates to the anti - lock brake system.

[IFallsRon]

Do a search for vehicle diagnostic code. There's several sources that will tell you what the codes mean.

[Cooter]

'dump valve'? Assuming front brakes? I knew my anti-lock would be disabled, thats about it. Thanks.

[Cooter]

Oh yeah, does 4 degrees before center, or whatever the proper term is, sound right for that beast timing wise?

[Jeremy airjer W]

Quote:

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'dump valve'? Assuming front brakes? I knew my anti-lock would be disabled, thats about it. Thanks.

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No I think it only has ABS for the rear brakes! RWAL (rear wheel anti - lock)

timing - 0 degrees btdc (before top dead center) on the 5.0 and 5.7 liter, 4 degrees btdc 7.4 liter. With the est connector unplugged.