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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15181
Experience:  GM Grand Master Technician 2007. 14 years experience.
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I have a "service brake booster" message. It came after I

Customer Question

I have a "service brake booster" message. It came after I replaced the alternator last night
JA: Have you done a battery test? Has there been any change in headlight brightness?
Customer: Battery was New last week
JA: What is the model/year of your Chevy?
Customer: 2003 Tahoe
JA: Are you fixing your Tahoe yourself? What have you tried so far?
Customer: I am doing everything myself :) I replaced the batterylast week because it was dead. The voltmeter has been showing irregular values so last night I replaced the alternator as well. After that the brake booster message came on
JA: Anything else you want the mechanic to know before I connect you?
Customer: I am googling this problem now and it seems a couple of guys have had similar problems after replacing their alternators. I have not found a fix yet
Submitted: 2 months ago.
Category: Chevy
Expert:  Tim's Auto Repair replied 2 months ago.

Hi, My name is ***** ***** for the delay.
I will do my best to assist you.

Expert:  Tim's Auto Repair replied 2 months ago.

you didnt unplug any vacuum hoses or anything when you replaced the alternator,,correct?