Last post on Dec 06, 2013 at 11:05 PM
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Cadillac Escalade, Cadillac Escalade EXT, Truck, SUV
#273 of 301 Re: PARKING BRAKE PROBLEM [jake5_28]
by MrShift@Edmunds HOST
Nov 06, 2011 (9:26 am)
Bulletin No.: 03-05-25-007D
Date: May 01, 2009
Subject: Antilock Brake (ABS) Activation At Low Speeds (Clean Wheel Speed Sensor Mounting Surface)
2002-2006 Cadillac Escalade, Escalade EXT
2003-2006 Cadillac Escalade ESV
1999-2006 Chevrolet Silverado
2001-2006 Chevrolet Suburban, Tahoe
2002-2006 Chevrolet Avalanche
2003-2006 Chevrolet Express
2007 Chevrolet Silverado Classic
1999-2006 GMC Sierra
2001-2006 GMC Yukon, Yukon Denali, Yukon XL, Yukon Denali XL
2003-2006 GMC Savana
2007 GMC Sierra Classic
2003-2006 HUMMER H2
Supercede:This bulletin is being revised to add the 2007 Silverado/Sierra Classic models. Please discard Corporate Bulletin Number 03-05-25-007C (Section 05 - Brakes).
Some customers may comment on ABS activation at low speeds, usually below 8 km/h (5 mph). Upon investigation, the technician will find no DTCs set.
The cause of this condition may be an increased air gap between the wheel speed sensor and the hub reluctor ring due to rust and debris built up on the sensor mounting surface.
Measure AC voltage and clean the wheel speed sensor mounting surfaces.
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in the General Information sub-section of the Service Manual.
2. Disconnect both the front wheel speed sensor connectors at the frame and harness.
3. Place a Digital Volt Meter (DVM) across the terminals of each wheel speed sensor connector.
4. Rotate the wheel clockwise approximately one revolution per second. The minimum reading should be at least 350 ACmV's. If the reading is less than 350 ACmV's, remove the wheel speed sensor. Refer to the applicable Wheel Speed Sensor Replacement procedure in the ABS sub-section of the Service Manual.
5. Plug the wheel speed sensor bore in order to prevent debris from falling into the hub during service.
6. Clean the wheel speed sensor mounting surface using a wire brush, sand paper, emery cloth, scotch brite, or other suitable material. Be sure to thoroughly clean the wheel speed sensor surface. There should be no rust or corrosion.
7. Check the sensor head to determine if it has been warped/distorted due to the corrosion build up or other causes. Check the mounting surface on the sensor head for flatness by placing it on the edge of a metal machinists scale or other suitable straight edge to measure the flatness. Check the sensor for flatness in multiple (minimum 3) positions/directions. If the sensor head is distorted, replace the sensor.
8. Apply (spray) two thin coats of the specified rust penetrating lubricant (corrosion inhibitor) to the complete sensor mounting surface on the bearing hub. Allow to dry for 3-5 minutes between coats. Use ONLY Rust Penetrating Lubricant, P/N 89022217 (in Canada, P/N 89022218).
9. When the corrosion inhibitor is dry to the touch (about 10 minutes), apply a thin layer of bearing grease to the hub surface and sensor O-ring prior to sensor installation. Use ONLY Wheel Bearing Lubricant, P/N 01051344 (in Canada, P/N 993037).
10. Install either the original sensor or a new one in the hub. Ensure that the sensor is seated flush against the hub. Refer to the applicable Wheel Speed Sensor Replacement procedure in the ABS sub-section of the Service Manual.
11. Place the DVM across the sensor terminals and recheck the voltage while rotating the wheel. The voltage should now read at least 350 ACmV's.
#274 of 301 abs and stability control activations
Nov 06, 2011 (4:06 pm)
I have a 2005 ext and experience this activation upon acceleration under 18kph. I shut down the traction control or take foot off accelerator then re accelerate after noise and vibration stops. I've had 1 speed control sensor replaced but dealership can't find fault codes. Do all dealerships have access to this bulletin 03-05-25-007D? I've paid too much so far to take it in for another no fault found diagnosis.
#275 of 301 Re: abs and stability control activations [bfan]
by MrShift@Edmunds HOST
Nov 07, 2011 (8:40 am)
Yes they all have access to TSB information.
#276 of 301 Re: abs and stability control activations [bfan]
Nov 07, 2011 (11:25 am)
If Customer Assistance can be of any service to you as you seek to have your vehicle concern resolved, please contact us via email with your name/user name, contact information, the last 8 digits of your vehicle’s VIN, and the name of your involved dealership.
GM Customer Service
#277 of 301 Re: 2003 Cadillac Escalade Rear Heat [karpenisi]
Nov 10, 2011 (5:37 pm)
I am having this same issue with my 05 Escalade, no warm air from the rear vents, but fully functional controls and normal function in the front system.
What is the auxillary control module, where is it and how do I recalibrate the system?
#278 of 301 2003 Escalade traction control activates unnecessarily
Nov 10, 2011 (8:28 pm)
I have to deactivate traction control every time I start the truck otherwise it activates every time I accelerate from a complete stop. Any answers?
#279 of 301 Re: Service Stability System [jake5_28]
Dec 10, 2011 (12:30 am)
I also had a problem with the brakes on my 2002 Escalade. The front speed sensors get corroded by the salt that is put on the roads to melt the snow. They need to be taken out and cleaned or replaced with new ones. There is a recall, but for some reason the '02 Escalade is not on it, so you will have to pay for it yourself. I tried to argue the point with my local Cadillac dealer, but to no avail! You can print out the recall notice from the internet and it will explain it in more detail. Although, the grinding is not a symtom of this problem, so this might be something else. Grinding usually happens when your pads or shoes are worn down and you're metal to metal with the drums or rotors. Hope this helps!
#280 of 301 2008 Escalade premature undercarriage rust
Dec 10, 2011 (7:57 am)
I have followed the posts and threads on the undercarriage rust issue with GM. I own 2 Cadillac escalades. I purchased Escalade brand new in 2007 and another purchased in 2008 which I traded my 2002(also bought brand new) in for the brand new 2008. Within a year the brake rotor rusted completely and peeled and warranty replaced. Again, within a year another set of rotors or rotors and brakes rusted out, now on third set of rotors were replaced, again under warranty as dealer said GM has had rotor issues. Each time escalade was taken to the dealer for all work. Now, for a year we have had a nightmare with undercarriage rust. Entire frame is rusted, ignition coils rusted out and were replaced, both manifolds and heat shields rusted so bad the bolts busted when they tried to replace them. The lines have rusted out, all replaced under warranty but now with 29,000 miles on this escalade the warranty ran out in November. I am fighting with GM, and due to go to court in January. Has anyone gone thru the court process and can weigh in what the result was? With only 29000 miles the vehicle is unsafe to drive. An expert looked at it and said it is the worst case of rusted undercarriage he has ever seen. I know this is a metallurgical issue with the 2008 frames as my 2002 and 2007 with 73000 miles has no rust. The 2008 frame, undercarriage, hinges, even the brackets under the hood are rusted and bubbling. I have a 2007 Toyota Tundra that has been in and out of strip jobs, off road in mine pits, sits next to the escalade in the driveway each night and not a bit of rush anywhere and it has 196000 miles. I am contacting the NHTSA and filing a complaint and holding my breath for what the outcome will be in court as the GM experts will testify that there are no rust history with GM undercarriages. The Sierra 1500 posts are living proof that there is a metallurgical problem and GM should step in and do a recall. I have photos that tell the whole truth. Wife doesn’t even drive it when the roads are bad, wont go on ice and minimal salt came in contact and it was always thoroughly washed. There must be an issue with the 2008 escalade frames and undercarriage. any thoughts? Heard GM offers no warranty on undercariage rust, Is That True?
#281 of 301 Re: 2002 Escalade transmission troubles [browncb]
Dec 16, 2011 (8:30 am)
I know this was a while ago that you posted this but by chance did you find anything out about your situation? Just yesterday my 2002 will go forward but not into reverse. I had someone say that it was the band for reverse within the tranny..wondering if you had any solutions given to you?
#282 of 301 2002 Cadillac Escalade Reverse issues
Dec 16, 2011 (8:32 am)
My 2002 will go forward but all of sudden with no issues will not go into reverse? Has anyone had this happen and if so did you find a solution?