might be just another abs trac light thread

justav6 · #1 01-15-2007, 11:02 PM

past few weeks iv had several problems, and i thinks they may be related. first off 00 gtp 100,000m. my route to and from work is under construction and the bumps and holes are the worst iv seen. i noticed at highway speeds the car was shuttering a bit, but would shutter excessively if i was on the accelerating or decellerating.noticable beginning at 60 gets worse to about 80, and stays the same 80 and above. just this morning my abs and trac control lights came on. home from work just trac light. then none. then both. i slammed the brakes and the wheels locked. for a few minutes after the front end sounded clunky.now its fine again. lots of threads about abs trac lights, but none mentioned the front end issues.any ideas on what im looking at here? i also began getting hvac blower issues the same few days, but im guessing thats unrelated. ?

BNaylor · #2 01-16-2007, 09:02 AM

Best thing to do is get it scanned with an ABS capable scanner.

richtazz · #3 01-16-2007, 01:37 PM

IT's rare, but I've had hub bearings that will get noisy, then quiet down. With you rcombination of symptoms, I'd say you have a bad front hub bearing. Jack the car up and grab the tire at different positions. If you have free play all around, then it's a hub bearing. If there is no free play, then as bnaylor suggested, you'll have to scan it with an ABS capable scanner to determine why those lights are on. The blower issue I believe is unrelated. If you have other electrical gremlins like the DIC, daytime running lamps, etc... acting up, your ignition switch/harness could be going bad. If there are no other electrical issues, you probably have a bad blower resistor (manual A/C) or blower module (auto climate control).

justav6 · #4 01-17-2007, 04:53 PM

thanks for the help. i wasnt able to check anything yet, it was 19 degees today. if i do need to have a wheel hub replaced what kind of financial damage will i be looking at?

justav6 · #5 01-21-2007, 05:27 PM

any price estimates?

BNaylor · #6 01-21-2007, 06:35 PM

Quote:

Originally Posted by justav6

any price estimates?

Just parts or parts and labor?

The hubs can vary in cost from around $99 - $180. It depends on the name and quality. You can get AC Delco hubs for around $150.00. Other suitable aftermarkets are Timken and BCA- National.

Labor costs vary and can run up to a couple of hundred dollars. It you can DIY you can save money on the labor. Special tools like a 36mm axle nut, big breaker bar, torque wrench and possibly a hub puller are required.

Checkout our new Tips & Maintenance section for a tech procedure.

justav6 · #7 01-22-2007, 01:19 AM

150 is fine. i dont have ALL of the tools you mentioned. should i try it myself or pay? what, youd say400 $ total?

BNaylor · #8 01-22-2007, 01:12 PM

Quote:

Originally Posted by justav6

150 is fine. i dont have ALL of the tools you mentioned. should i try it myself or pay? what, youd say400 $ total?

If I did not have the knowledge, tools or capability to do the work DIY and after getting a few estimates confirming that is the going rate probably so. However, I believe around $300 would be more reasonable even with an AC Delco hub.

richtazz · #9 01-22-2007, 09:50 PM

Hubs are not a technically difficult job (about the same abilities as doing your own brakes). The special tools needed can be rented for free at Auto Zone if you have one in your area. The most important part is buying a quality brand name hub (no white box China Garbage), and torquing everything to spec by hand, NO IMPACT TOOLS!!! I did the front brakes and one hub on my mom's Monte Carlo in about 1 to 1-1/2 hours, without ever firing up my compressor and only using hand tools/hand jack/jackstands (no hoist). Granted I'm pretty good with a wrench and have quite a bit of experience, but this is a job you should be able to tackle yourself if you want to save some $$$$.

bigstakz · #10 01-25-2007, 10:39 AM

I've found the problem to my "ABS/TRAC" Lights. The connection from the hub to the car's computer (I'm guessing) that contains the sensor was broken after hitting a huge pot hole. I put a wire tie on it temporarily until i can find out cost of part and labor if possible to replace.

justav6 · #11 01-29-2007, 12:43 AM

really appreciate the help everyone. il let you know how it turns out

justav6 · #12 02-15-2007, 10:48 PM

ok heres the update. i checked the hubs, and both fronts were bad. i took it to my machanic and had them replaced along with crearing the codes for abs trac control.abs and trac light never went off. he scanned the codes and ran through the alldata prcedures. the codes it turned up were co550 and co244. he said he thinks the ebtcm is bad, but didnt want to replace it if thats not the definite cause. anyone have any suggestions for me? if it is the ebtcm, i saw a few for sale from a gt. i didnt know if that would work in a gtp. i appreciate any help

richtazz · #13 02-16-2007, 08:44 AM

The brake module from any 99-03 GTP will work (GM#88894774), but one from a GT or SE will not work as they are different.

justav6 · #14 02-17-2007, 01:21 AM

thanks for the help. at least i know what im looking for. as far as those codes do you think the ebtcm module is the problem?

BNaylor · #15 02-17-2007, 09:18 AM

Quote:

Originally Posted by justav6

thanks for the help. at least i know what im looking for. as far as those codes do you think the ebtcm module is the problem?

The problem is those are generic ABS/Chassis DTCs and really don't tell you enough about whether your EBTCM module is bad. It depends on what scanner was used. Doesn't look like a GM Tech 2. I have no listing for the C0244 DTC, C0550 means "ECU Malfunction."

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