mvrk10256

Ok guys here is the scoop. I bought the truck about a month ago and 3 weeks ago both the ABS and BRAKE lights would come on together during driving. If I turn the truck off and turn it back on all is well. It was happening once every few days and with no regularity. Now its worse, comes on every time i drive the truck. OBD2 scanner shows no codes.

I have read several service bulletins that refer to a loose ground, I went through the driver side frame rail and tightned all the bolts it didnt help. Fluid level is good and I just flushed all of the fluid the other day.

I am running out of ideas and I have to tow a heavy trailer with all my stuff in it to Austin Monday. I dont want to drive down 35 with no ABS much less tow.

TIA,
Maksim

JoeGibbSilverado

iTrader: (9)

Same height tire on all 4 corners? I say this because I ran a tire that was taller than the fronts in the rear, and my lights would comeon

mvrk10256

Nope. 4 identical tires. Fronts appear to have slightly more wear than rears but that should not be an issue.

BigKID

iTrader: (5)

Need to go have the codes pulled to know for sure. Could be as simple as cleaning/replacing a front wheel speed sensor or worse, the abs pump gone bad.

mvrk10256

I have an ELMscan tool. It is showing no codes stored or pending. Do I have to go to the dealer for diagnostic as I would rather not pay stupid amounts of money for them to hook up a computer.

azchevydude

Had the same problem. It is the ABS module. You can get a new one for like $900 or take it off and send it to ABSfixer. They will repair it for like $120. Just go to there website for all the info.

mvrk10256

Damn. Thats pretty shitty. It says that you can drive without it though. I will probably get under there tonight, and take a closer look at the control module - might be something simple like cleaning the contacts.

Maksim

LS-Powered

I had the same problem mine was a speed sensor. Take out the sensor and see If there is any metal shavings that's could be throwing it off.

ak2007r6

iTrader: (1)

ABS module. Just had one replaced on my brothers truck that was causing the exact same problem.

mvrk10256

Hmm. Well it seems that either:
a. its a simple issue like faulty plug or dirty sensors
b. its the ABS module.

Only one of these things can be fixed in time for my trip, guess this weekend I am going to check out the module closely, and pull all the wheels to clean/check sensors. Fortunatly those are easy to test, also probably a good time to repack all the grease fittings in the front end.