Question about 2003 GMC Envoy Xl

1 Answer

03 GMC EnvoyXL CBM-how much and how do to replace it.

Having several issues and think it may be the CBM. Do you agree?

Front AC Blower not working
Sunroof not working
ABS Brake Light stays on
Emerigency Brake light stays on
Seat Belt Light stays on
Airbag Light stays on
ON-Star not keeping a connections
Everything else works GREAT... Fuses were replaced, Battery and Alternator check out fine.

Have no idea how much this is gonna cost. Any ideas? Is this something my husband can do? does the Dealer have to program the replacement?

Thanks for any advise on these issues....


Posted by on

  • Jamie Jackson May 17, 2009

    THanks... it was an expensive scanner.. a friend of ours works for the FBI and he was allowed to bring it home to scan my truck.. thats the one that wouldnt connect.. The one AutoZone also couldnt connect. So really we should take it to the Dealership and let them sort it out..

  • Jamie Jackson May 17, 2009

    yes theres a $90 charge for diagnosis.. we are gonna take it in on Monday morning.. does the dealer usually have this item in house? or should I expect a few days without it?



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 253 Answers

You really need to have it scaned by someone with propre equiptment. If it is a body module it will be around $500 for the part. Then it will have to be programed at a dealer. Really before you spend that much get it checked by a shop that knows computer systems. Good Luck

Posted on May 17, 2009

  • Mike White
    Mike White May 17, 2009

    I work for a GM dealer in Texas, been doing this for 20 years. It will probably only cost you about an hour labor check out to find out the cause. Good Luck

  • Mike White
    Mike White May 17, 2009

    Most do not stock it, but it is usually an overnight item. Let me know if I can help.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Front ac blower wont shut off after the truck is shut off

This would indicate to me the vehicle has had an issue with the wiring, perhaps an accident in the front end, and someone has hooked up the wires wrong.
The radiator-cooling electric fan can run up to several minutes after you shut off the engine, as it is cooling off the cooling system.
The A/C fan, however, should shut off with the engine.
God bless your efforts.

Sep 07, 2015 | 2003 GMC Yukon XL 1500 SLT

2 Answers

Heater won 39 t blow on 5

haw i fix my rpm meter problem

Sep 28, 2013 | Cars & Trucks

1 Answer

I Have an 03 gmc sierra 2500hd. the problem is the manual speed control knob for the heat/ac only work at the highiest setting. all of the lower speed controls don't work. What do you think is the problem?

there is a resister near the blower motor that controls the fan speeds that is most likely your problem when it goes bad the blower motor will only work on high i have changed many of them on many cars & trucks

Aug 10, 2013 | 2003 GMC Sierra 2500HD

1 Answer

2001 sequoia front ac blower not working, blower motor is OK

Sounds like a Controller Issue with the Climate Control. Seeing that you applied power and it worked, then it is not the Motor.

UNLESS you try it on ALL SPEEDS and if it then does not work, you have an Input problem.

If it only works on ONE SPEED, then you have a Resister Issue for the Blower

Apr 06, 2013 | 2003 Toyota Sequoia

1 Answer

How do I access/replace the heater/ac blower motor fan speed control switch? Rear air is not blowing cold-Front is. Freon low?

I have the same issue and my problem is not the blower, it works but the plug into is the problem and that small part is not sold seperately. I wedged it for a time but now that is not working. Anyone else having the issue or replaced that part?

Aug 23, 2010 | 2000 Pontiac Montana

1 Answer

AC blower stopped working on my 2004 GMC EnvoyXL. The rear AC blower works but not the front. Checked the fuses and relays, they appear to be OK.

does it work on heat mode if not then it is probably the blower motor switch in the dash or the blower itself

Jul 11, 2010 | 2004 GMC Envoy

1 Answer

I have 2003 gmc envoy my front ac control does not

Need to check to see if the blower motor is running.If it is,but not threw the vents,most likely a vent door actuator motor.The actuator motor in this case would be bad,it is hard to get to,unless you are mechanically inclined,You can do it your self.If the blower motor is bad,just replace it.Check fuses first,and the blower relay.If I can help,let me know.

Aug 29, 2009 | 2003 GMC Envoy Xl

1 Answer

1999 yukon denali front blower motor not working

Check Fuse #3 in the under hood fuse block it is the only common connection I can make.

Jun 28, 2009 | 1999 GMC Yukon Denali

Not finding what you are looking for?
Cars & Trucks Logo

233 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts


Level 3 Expert

76673 Answers


Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides