What size torx bit for a 2003 monte carlo front brakes

T45 or T50

Have to own a complete set of torx,
as well as metric hex drivers to work
on brakes or any vehicle component

2 things to look at is the directional switch and or brake light switch on the brake pedel. my 1999 monte had the same thing and I replaced thedirectional switch and it was fixed

You need Torx bits

• You can get your steel brake line here http://www.autozone.com/autozone/parts/1999-Chevrolet-Monte-Carlo/Brake-Line-Steel/_/N-jd582Z8kp1m?filterByKeyWord=brake+line&fromString=search
• When you get to the link enter your engine size and then you can narrow your search on the right by selecting the length and diameter.

• If you have any comments then you can feel free to leave them here.
• Hope this helps and thank you for using FixYa.

Regards, Tony

its either a T50 or T55

have the brakes bled and checked for a sticking caliper or bad flexible hose leading to the caliper.

Nope.

Something as simple as a different tire size can cause the abs to go nuts. I even had it where the two tires were the same size. But a different brand name. Each manufacture has their own tire sizing so not all tires a equal in size. Even though it says on the side of the tire that they are the same size.

Sometimes the cooper inside the insulation of the wires going to the sensors corrodes. Especially on the front units. It reads more ohms than normal but not open and is very intermittent. However moving the wires my make it work for a while. That's why replacing bearings seems to fix the problem but it comes back after a while.

You can test the speed sensors yourself...
Front sensor specs:
956 to 1240 ohms in 41 to 110 degree weather
at least 100mV AC (NOT DC!) volts when hub is spun by hand
Rear sensor specs:
950 to 1300 ohms in 41 to 110 degree weather
At least 100mV AC (NOT DC!) volts when hub is spun by hand

Here is some information from service bulletins that could be related to the problem. The traction control, antilock brakes, and tire inflation monitor all use wheel speed sensor input.

This first bulletin seems like it could be the problem because engine movement is involved:

GM Corporate Bulletin 00-06-04-049B
This Bulletin covers a problem that can cause multiple failures, one of which is an Antilock brake problem, and covers 2000-2003 Impala and Monte Carlo built prior to 2/03.
Check to make sure the wiring harness adjacent to the AC accumulator/dryer is not rubbing against the ac accumulator chaffing through the insulation of the wires in the harness.

GM Corporate Bulletin 03-05-25-008 overview:
GM front wheel speed sensor harness replacement - 2001-2003 Buick Century, Regal; 2001-2003 Chevrolet Impala, Monte Carlo; 2001-2002 Oldsmobile Intrigue; 2001-2004 Pontiac Grand Prix
This bulletin is about inspecting the harness going to the front wheel speed sensor for wear from contact with front suspension parts.
Repair harnesses/leads are available that can be spiced onto the main harness.
2001-2003 impala & Monte Carlo – Right side - 10340313
2001-2003 impala & Monte Carlo – Left side - 10340314

SERVICE BRAKES, HYDRAULIC:ANTILOCK:ABS WARNING LIGHT
• TSB #030525008 -- INTERMITTENT/CONSTANT ANTI-LOCK BRAKING SYSTEM (ABS) MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED. *TT (NHTSA ID #10004719, OCTOBER 01 2003)

Hope helped.

check the rear rotors(i assume it has rear pads not drums) they probly are worped ,if not have front end checked for worn parts and allighnment

No, all you need is metric wrenches, a big hammer to remove the rotors and a c-clamp to push the piston back in the caliper.