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Old 01-20-2019, 09:54 AM   #1
ckhaze
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Tow Vehicle Brake Line Failure

Just a heads up....I have a 2003 Chev 2500 with 8.1L engine and Allison tranny for towing my fifth wheel. Last summer I had the unfortunate experience of having a brake line of the truck blowing out when I needed it most on I-94 in Michigan. Came close to flipping the trailer. As it turned out, the brake line rusted out just in front of the booster pump under the driver side of the cab. I thought brake lines were stainless, not true. Apparently it is not just GM vehicles with steel lines. After getting the truck and trailer fixed I changed all the brake lines to stainless. Dorman has pre-bent kits for a bunch of trucks. While replacing the lines, 2 of the other 4 lines collapsed without much force. All in the same location. This truck only has 110k on her. In the garage most of the time. I just use her to tow, plow my drive and lumber yard runs. If your truck is over 10 years old, I recommend checking your brake lines.
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Old 01-20-2019, 12:49 PM   #2
hornet28
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Your lucky they lasted that long. The 02 that I bought new needed them in either 07 or 08. It's be all over the net for years that the lines rusted out very quickly on those trucks
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Old 01-21-2019, 02:13 AM   #3
kksfish
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Similar issue a few years back and the mechanic I used had seen lots of these and had a thought why is was happening to so many trucks that were stored in garages.
He thought it was due to the trucks being used in the rain and snow then being put into unheated garage and sitting for weeks before being used again so the undercarriage never really got to be wasted and dry out like a truck that sits outside.

Sounded reasonable to me at the time.....
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Old 01-21-2019, 07:10 AM   #4
hornet28
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It wasn't just garaged trucks. Mine sat outside 99.9% of the time. I felt it showed the cheapness of materials
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07 GMC CC LB dually LBZ, Idaho Rob EFI, DeeZee boards, 50 gal TransferFlow inbed tank
05 32' Montana Mountaineer 5th wheel 2 slides
1941 Ford cpe 454/700R4
1917 T roadster 270 Hemi/4 spd
34' car trailer w/63" semi sleeper on the front
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Old 01-30-2019, 12:38 PM   #5
cavediver
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Just replaced the lines on my 06 GMC. A friend has the same year and had his replaced two years ago. I used copper-nickle lines. The liquid rust they are putting on the roads up here is terrible.
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Old 01-30-2019, 12:56 PM   #6
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Aren't the northern states and Canada awesome for salt and rust?
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Old 01-30-2019, 02:07 PM   #7
cavediver
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The salt was bad enough, but the brine mixture they put down. I think the car manufacturers are paying them to put down. I call it liquid rust.
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Old 01-30-2019, 03:44 PM   #8
Steveo57
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Had that happen to my old 2004 Nissan Titan last year. Pulled the trailer to Maine and just as I was pulling in the campground the brake light came on. Found a leak in the same spot as the OP. Had a local shop replace all the lines and hoses while I was up there. They also noticed one of the lower control arms was rusted pretty bad. After I got home I found the control arm was starting to bend it had rusted so bad. Had that replaced and then got rid of the truck and got my new Ford.
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Old 01-30-2019, 04:13 PM   #9
hornet28
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Cavediver is that Swanton Oh.?
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07 GMC CC LB dually LBZ, Idaho Rob EFI, DeeZee boards, 50 gal TransferFlow inbed tank
05 32' Montana Mountaineer 5th wheel 2 slides
1941 Ford cpe 454/700R4
1917 T roadster 270 Hemi/4 spd
34' car trailer w/63" semi sleeper on the front
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Old 01-30-2019, 10:56 PM   #10
Hankster
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This is one of the few items that the manufacturer ought to be held to a higher standard. If it was required the actual cost per vehicle wouldn't be that great for all stainless steel lines.
Luckily I live in the arid Idaho climate and this has never been an issue. Even though, growing up in the rust belt west side of Cleveland I've always liberally douched my cars undercarriage especially in the spring once it warms enough to regularly wash the vehicles.
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