# Changed front calipers. Should I bleed back calipers also? **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** sonoma, gmc\ **Created:** [June 18, 2020, 11:47pm UTC](https://community.cartalk.com/t/changed-front-calipers-should-i-bleed-back-calipers-also/165978 "2020-06-18T23:47:48Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![jameson.luttrell\_154832](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@jameson.luttrell\_154832](https://community.cartalk.com/u/jameson.luttrell_154832)\ **Post date:** [June 18, 2020, 11:47pm UTC](https://community.cartalk.com/t/changed-front-calipers-should-i-bleed-back-calipers-also/165978/1 "2020-06-18T23:47:48Z")
Hi I have a 2001 Sonoma. I just replaced my front calipers and pads. The rear wheals are disk brakes. I’m wondering if I have to bleed all four breaks. I’ve read that some vehicles have separate lines running to the master cylinder and you don’t have to do them all at once. Thanks for any answers. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [June 18, 2020, 11:57pm UTC](https://community.cartalk.com/t/changed-front-calipers-should-i-bleed-back-calipers-also/165978/2 "2020-06-18T23:57:57Z")
If either the front/rear brake components have been replaced where it requires bleeding any part of the brake system, the entire brake system should be bled. Tester ---
**Author:** ![jameson.luttrell\_154832](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@jameson.luttrell\_154832](https://community.cartalk.com/u/jameson.luttrell_154832)\ **Post date:** [June 18, 2020, 11:58pm UTC](https://community.cartalk.com/t/changed-front-calipers-should-i-bleed-back-calipers-also/165978/3 "2020-06-18T23:58:45Z")
So that’s true even if the system has independent lines? ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [June 19, 2020, 12:00am UTC](https://community.cartalk.com/t/changed-front-calipers-should-i-bleed-back-calipers-also/165978/4 "2020-06-19T00:00:39Z")
Yes! The brake fluid in the rear brake system is just as old as the brake fluid that was in the front brake system. Tester ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [June 19, 2020, 12:01am UTC](https://community.cartalk.com/t/changed-front-calipers-should-i-bleed-back-calipers-also/165978/5 "2020-06-19T00:01:25Z")
Brakes are kind of important so why do you not want to do it right and bleed the entire system? ---
**Author:** ![jameson.luttrell\_154832](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@jameson.luttrell\_154832](https://community.cartalk.com/u/jameson.luttrell_154832)\ **Post date:** [June 19, 2020, 12:03am UTC](https://community.cartalk.com/t/changed-front-calipers-should-i-bleed-back-calipers-also/165978/6 "2020-06-19T00:03:10Z")
The fluid isn’t that old. I wasn’t flushing the system. Just replacing the parts. I thought I could just top off what I lost ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [June 19, 2020, 12:04am UTC](https://community.cartalk.com/t/changed-front-calipers-should-i-bleed-back-calipers-also/165978/7 "2020-06-19T00:04:40Z")
How old is the brake fluid? Tester ---
**Author:** ![jameson.luttrell\_154832](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@jameson.luttrell\_154832](https://community.cartalk.com/u/jameson.luttrell_154832)\ **Post date:** [June 19, 2020, 12:07am UTC](https://community.cartalk.com/t/changed-front-calipers-should-i-bleed-back-calipers-also/165978/8 "2020-06-19T00:07:54Z")
I’m pretty sure right before I bought it so a little under two years ago. I’ve put maybe 15,000 miles on it. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [June 19, 2020, 12:08am UTC](https://community.cartalk.com/t/changed-front-calipers-should-i-bleed-back-calipers-also/165978/9 "2020-06-19T00:08:56Z")
Then just bleed the fronts. Tester ---
**Author:** ![jameson.luttrell\_154832](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@jameson.luttrell\_154832](https://community.cartalk.com/u/jameson.luttrell_154832)\ **Post date:** [June 19, 2020, 12:10am UTC](https://community.cartalk.com/t/changed-front-calipers-should-i-bleed-back-calipers-also/165978/10 "2020-06-19T00:10:54Z")
Thanks. I couldn’t fit my whole truck into my garage and I really didn’t want to lay out on hot concrete. ---
**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\ **Post date:** [June 19, 2020, 12:30am UTC](https://community.cartalk.com/t/changed-front-calipers-should-i-bleed-back-calipers-also/165978/11 "2020-06-19T00:30:54Z")
You could back into the garage, or am I missing something? ---
**Author:** ![jameson.luttrell\_154832](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@jameson.luttrell\_154832](https://community.cartalk.com/u/jameson.luttrell_154832)\ **Post date:** [June 22, 2020, 10:25pm UTC](https://community.cartalk.com/t/changed-front-calipers-should-i-bleed-back-calipers-also/165978/12 "2020-06-22T22:25:26Z")
No I was in a bit of a time crunch. I’m going to get to it today or tomorrow.