hi, i'm new on here My name is jeremy, i live in St. Agatha Ontario outside waterloo. i was wondering if the Brake Booster from a 2004 Envoy will fit/Work on a 1999 Jimmy. my brother just found out that the brake booster is ****ed on the Jimmy, sometimes the brakes work and sometimes they don't and he says its the brake booster, and he got a 2004 Envoy he wroteoff in augest 2008 and i was wondering if the envoy brake booster will fit in the jimmy if its not damaged from the accident. i know that this is a Chevy Site but GMC and Chevy are both GM Makes and the S10 Blazer and the S15 Jimmy would be simmalar in the most part like the Envoy and the Chevy counterpart or so i would think.