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2003 Escalade EXT
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41 Posts
Discussion Starter #1
I have an 03 EXT with a shimmy in my front end that feels like out of balance tires. Tires have been recently balanced so I know that isn't the problem.

The mystery is the problem isn't constant. Can drive the same road in the morning and have a shimmy, drive it later that day, or the next morning, and no shimmy. When I turn off the stability control the shimmy lessens. If I stop and start again with the stability control off, the shimmy is gone, usually.

Any suggestions what it could be?
 

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2003 Escalade EXT
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41 Posts
Discussion Starter #3
What do you mean "shimmy"?
Sorry, shimmy must be a Canadian word. I mean an up and down vibration in the front wheels you can feel in the steering wheel, and at 50mph, can feel in the cab. Vehicle still steers and tracks fine.
 

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99 Escalade (sold) 03 Escalade EXT (sold) - 07 Escalade EXT
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1,363 Posts
only when your braking? warped rotors
while vehicle is in motion? most likely wheel bearings

The tires can not be the problem, as it would be constant and not sporadic.
 

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2003 Escalade EXT
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41 Posts
Discussion Starter #5
only when your braking? warped rotors
while vehicle is in motion? most likely wheel bearings

The tires can not be the problem, as it would be constant and not sporadic.
I appreciate your input. The problem isn't when I brake. Wheel bearings maybe, but why would turning off the stability control stop the vibration.
 

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99 Escalade (sold) 03 Escalade EXT (sold) - 07 Escalade EXT
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I appreciate your input. The problem isn't when I brake. Wheel bearings maybe, but why would turning off the stability control stop the vibration.
it might be one of those psychological things where you think its less noisy? or is it noticeably quieter?
 

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2018 GMC Sierra, 1995 Jeep Wrangler
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12,114 Posts
Bad tires would be my guess. Rotate the front tires to the rear and see if that makes a difference. How old and how worn are your tires? Also, I know from past experience if you let your vehicle sit for very long the tires can develop flat spots. When you first drive the vehicle you'll experience a front end "shimmy" or vibration. After you heat the tires up a little the flat spots will come out and the vibration will improve. Just possibilities.
 

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04 Ext, 94 deville
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198 Posts
you have aftermarket wheels? Oversized? Roadforce balance them! Sounds like slightly out of balance wheel to me as well!
 

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2003 Escalade EXT
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41 Posts
Discussion Starter #9
you have aftermarket wheels? Oversized? Roadforce balance them! Sounds like slightly out of balance wheel to me as well!
I have Cadillac 20" rims with Michelin LTX tires. It certainly feels like an out of balance tire, but if this was the case, I would expect to feel the vibration most of the time I drive. Today's driving, no vibration. It's the randomness that makes this problem perplexing.

Appreciate the suggestions and will keep researching. May end up having to go to the stealership.
 

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Yukon
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15 Posts
Might be the front shocks. Might want to have your autoride checked. When my front shocks were shot i was getting some bouncing in the front end on the high sometimes but not all the time.
 

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2012 Escalade, 2014 SRX
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13,353 Posts
How many miles on your truck? Could be the steering box gears showing wear, it's been a while since I had my 03' :hmm:
 

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2003 Escalade EXT
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41 Posts
Discussion Starter #13
Might be the front shocks. Might want to have your autoride checked. When my front shocks were shot i was getting some bouncing in the front end on the high sometimes but not all the time.
Good suggestion, I will check it out. Your symptoms sound similar to mine. Thanks.
 

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2003 Escalade EXT
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41 Posts
Discussion Starter #14
How many miles on your truck? Could be the steering box gears showing wear, it's been a while since I had my 03' :hmm:
60,000 miles. It still tracks and steers very well, even with the vibration, so it makes me think it is something other than the steering gears. Appreciate the suggestion though.
 

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2009 Escalade
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1 Posts
Did you ever solve this? My 2009 has the same issue. It is not the wheels, it is not the tires, it is not the balance.
Sometimes when I go over a bump on the freeway, the shimmy starts. Sometimes I can drive 50 miles with nothing.
Must have something to do with inadequate control arms or something.
Suggestions? It is very irritating.

Max

[email protected]

2009 Escalade, lowered 2.5 all around, dropped spindles, Magnaflow CatBack, Magba Charger blower - outting out close to 600HP. Awesome machine apart from some quality issues that should not exist for an $80K vehicle.
 

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2018 GMC Sierra, 1995 Jeep Wrangler
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Raising or lowering the vehicle changes the steering geometry. Did your truck shimmy before you lowered it?
 

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2003 Escalade EXT
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41 Posts
Discussion Starter #17
Did you ever solve this? My 2009 has the same issue. It is not the wheels, it is not the tires, it is not the balance.
Sometimes when I go over a bump on the freeway, the shimmy starts. Sometimes I can drive 50 miles with nothing.
Must have something to do with inadequate control arms or something.
Suggestions? It is very irritating.

Max

[email protected]

2009 Escalade, lowered 2.5 all around, dropped spindles, Magnaflow CatBack, Magba Charger blower - outting out close to 600HP. Awesome machine apart from some quality issues that should not exist for an $80K vehicle.
The problem went away on its own and hasn't come back. Though after one of my tires went flat to the rim from a slow leak last December, I do have a slight vibration at 60mph. If you have GM OEM chrome rims, keep an eye on your tire pressure. It is only a matter of time before they start to leak.

I did read in an Avalanche forum where a similar problem was diagnosed as a sensor that was getting wet and malfunctioning.

Sounds like otherwise you have an awesome truck. Imagine with all that HP, you spend a lot of time at the gas station. ;)
 
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