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Jim Grant Tech Tips Jim Grant Tech Tips
A collection of helpful articles based on reader submissions
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  Jim Grant's Tech TipsJim Grant's Tech Tips
Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
If you have any questions, please feel free to email us.
 
 

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  Jim Grant's Tech Tips

89 Chevy C10, Soft Brakes
Q: The brakes on my Ď89 Chevy 1/2 ton p/u truck feel soft or spongy. I have been told that there was a recall for this. Can you help?

A: I was unable to find any recalls for a soft brake problem. But if your Chevy pick-up has rear wheel Anti-Lock Brake System (ABS) then ALLDATA Information Systems has a Technical Service Bulletin addressing low brake pedal problems. Your condition may be caused by an internal leak in the Electro Hydraulic (E-H) valve. The E-H valve is the part of the ABS brake system that controls the brake fluid pressure to the rear brakes. The cause is often due to small particles of foreign material, fluid contamination, preventing the valving inside the assembly from sealing properly. Itís important to understand that brake fluid is designed to absorb moisture and WILL become contaminated! I cannot stress enough the importance of having the brake fluid flushed and replaced with fresh fluid as part of vehicle maintenance. We have been replacing costly ABS parts in our shop "only because" they have been damaged by contaminated brake fluid. You should see how people lose their balance when we tell them the cost of a 4-wheel ABS part! Then the look on their face when you tell them that $5 of brake fluid and less than 1 hours labor could have prevented a $1000 repair bill. Is this a sales pitch? You have the information. Itís your vehicle, brakes and wallet; you make the choice.

 
     
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