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2003 gmc 3500 savana with severe rear end vibration when

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braking. What are the possible...
2003 gmc 3500 savana with severe rear end vibration when braking. What are the possible causes other than drive shaft u joint? How do I check to see if the u joint is bad?
Submitted: 12 months ago.Category: GMC
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Answered in 1 minute by:
11/27/2016
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 12 months ago
david craig
david craig, Owner/[email protected] 3D Atuomotive
Category: GMC
Satisfied Customers: 4,049
Experience: owner/mechanic at 3D Automotive
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Hi Im David, thanks for visiting the site. can you feel the vibration in the brake pedal?

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Customer reply replied 12 months ago
No
Customer reply replied 12 months ago
At least I don't recall. It's not a van I drive often at this time of year
Customer reply replied 12 months ago
I'll double check and get back with you in 15 minutes
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 12 months ago

ok

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Customer reply replied 12 months ago
Apologies . My driver gave me the wrong van. It's my 2013. Which is ok because I did an oil change and tire rotation yesterday and now the problem is in the front. Brake pedal is fine. I'll have the tires balance checked and get back to you if that doesn't clear it up
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 12 months ago

ok.

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Customer reply replied 12 months ago
As it turns out I didn't rotate the tires on that van. So all things being equal, the vibration went from rear to front with no vibration or pulsing of the brake pedal. I'll check with the driver this afternoon and get his input and get back with you tomorrow after the new tires are put on.
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 12 months ago

ok. i appreciate the update.

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Customer reply replied 11 months ago
I had new tires put on today and I'm still getting violent shaking coming from the front end when braking coming from highway speeds such as exiting the highway. I am having it aligned tomorrow. What's odd is that when I drove the van Saturday the vibration was definitely coming from the rear. Now it's in the front. Brake pedal is unaffected. The van has 42K on it. There are not any mechanical noises either.
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 11 months ago

do you feel it through the steering column?

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Customer reply replied 11 months ago
Minimal
Customer reply replied 11 months ago
Minimal. Should I wait to proceed until after the alignment?
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 11 months ago

i definitely would.

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Customer reply replied 11 months ago
Ok. Touch base with u tomorrow
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 11 months ago

if something is extremely bad i.e. bearing, tie rod or balljoint they wont even do the alignment, but at least they can tell you whats up

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GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 11 months ago

checking in to see how its going

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Customer reply replied 11 months ago
They did the alignment.
I didn't pick up the van so I wasn't able to test drive. I'll rate you now so you can get paid, but, will let you know tomorrow am how the test drive goes
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 11 months ago

ok. please let me know. thanks

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Customer reply replied 11 months ago
The vibration is gone in the front but the van still shakes in the rear when braking at higher speeds. Such as speeds 50 and above.
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 11 months ago

did you have the rear tires rebalanced?

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Customer reply replied 11 months ago
Brand new tires Michelin
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 11 months ago

im out of ideas my friend. i will opt out and maybe another tech will have a different opinion. sorry. good luck.

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Customer reply replied 11 months ago
Ok. Thanks for you patience
GMC Mechanic: hilltop4527, Auto Service Technician replied 11 months ago
hilltop4527
hilltop4527, Auto Service Technician
Category: GMC
Satisfied Customers: 91
Experience: Independent repair shop owner/operator experience with many makes and models both foreign and domestic.
Verified

hi there I see you are having some trouble. I will try to help. unless I'm missing something it appears like everyone is missing the most likely cause of shaking while braking. which is warped brake rotors. Have these ever been replaced?

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Customer reply replied 11 months ago
No . If the rotors are warped would that cause the rear end vibration?
Customer reply replied 11 months ago
That's why my first thought was the u joint
Customer reply replied 11 months ago
How do I check that?
Customer reply replied 11 months ago
I can check the rotors and drums and shoes, but, it wouldn't be until Saturday
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hilltop4527
hilltop4527
hilltop4527, Auto Service Technician
Category: GMC
Satisfied Customers: 91
91 Satisfied Customers
Experience: Independent repair shop owner/operator experience with many makes and models both foreign and domestic.

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