i jsut got my truck lifted 6 inch cst with 18inch rims and 305/70/18 tires
just about everytime i go to start up the truck i get the service brake system on the dic and my abs and brake light comes on.it clears if i shut it off and restart the truck.it only does it on start up and no other time.is this something with the pcm or something that could have happened when they lifted it.as it just started doing it a few days after it was lifted..and yes the pcm is tuned for the new tires from nelson
Last edited by chuckie311; 11-16-2007 at 01:11 PM.
Originally Posted by chuckie311
it's got something to do with maybe alan didn't put the right tires size in, only time i see those lights come on is when i blow the rear end out and the time i went over 155mph
2006 silverado SS....Clifford Jr...turbo coming soon
1970 Chevelle ly6 swap....d1 coming soon
yeah i sent him a email asking him if it could be the pcm.
Its an ABS issue. The large tires screw with it. The ABS doesn't like large OD tires. The ABS also doesn't like small diam tires, like 27". I don't know how they fix it but I've heard lots of lifted guys complain about the ABS light being on when they went to oversize tires.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
i have never heard of this problem and my friend up the street has a lifted truck and he has no problems.as many chevys i have seen at my friends shop no one has had this problem.
Mine did the same thing.
Make sure Alan has your correct gear size and tire size. Actually go and measure the tire. large tires are usually smaller than the advertised size.
This will take care of the problem.
yeah i gave him my tire size.305/70/18..how do u measure the tire correctly..gears wont be done till next year..and by then ill have hptuners so he can email the file.
He has to have the current gears and tire diameter. If he puts the gear size in that you want in the future it will give you the ABS code. Take a tire off the ground and run a tape measure around it or put a mark on the OD and on the ground, drive one full revolution and measure the distance you travel. After that divide the distance by PI or 3.1416 and I think that gives you the diameter of the tire.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
sounds good ill do that tomorrow..thanks for you help everyone.
or you can do it the easy way. Take your tape measure out to your wheel, place one end on ground and measure to the top of wheel. This is how I did mine. My speedometer was dead on with my gps.
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