Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi, I'm Chad ,Welcome To JustAnswer, I'm reviewing your question and I will be be posting a replay ASAP
1- check for vacuum leak
2- check the vacuum hose going to booster , do you have any ?
3- if you do have a good vacuum and still service booster , then the brake booster needs replacement , as long as the brake master cylinder is not leaking, you can tell if there is evidence of brake fluid .
Please let me know if you need anything else on it
Hope I was helpful to you
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Chad FarhatASE Certified Technician