







🚗 Upgrade your brake game with pro-grade precision and safety!
The ACDelco Gold 18M2426 Brake Master Cylinder Assembly combines cast iron and aluminum for durable, stress-free mounting. Engineered to meet rigorous SAE J1153 and J1154 standards, it delivers reliable braking performance. Featuring a precise 0.937-inch bore diameter and a piston assembly designed to prevent brake drag, this ready-to-install unit ensures a perfect fit and longer brake pad life for your vehicle.










| ASIN | B005OVCHRY |
| Best Sellers Rank | #495,475 in Automotive ( See Top 100 in Automotive ) #1,125 in Automotive Replacement Brake Hydraulic Parts |
| Brand | ACDelco |
| Customer Reviews | 4.6 4.6 out of 5 stars (329) |
| Date First Available | September 22, 2011 |
| Exterior | Machined |
| Item Weight | 1.33 pounds |
| Item model number | 18M2426 |
| Manufacturer | ACDelco |
| Manufacturer Part Number | 19288627 |
| Model | Brake Master Cylinder Assembly |
| OEM Part Number | 19288627 |
| Product Dimensions | 11.3 x 7.7 x 5.6 inches |
C**K
OEM made in China
Good quality and has worked well so far. This was a General Motors replacement part in a GM Delco box. Inside it says made in China. I probably won’t buy again. Will buy American made if I can find one.
M**S
Great
I like how it fit pretty well
D**L
Perfect Factory Replacement
Install was easy, I originally replaced my hydro pump and was still getting fluid contamination. Had to drain my brakes a few times on couple long trip. Finally replace the brake master cylinder and it fixed the problem. Pre-bleeding the master cylinder was the key to eliminating air in the lines.
D**E
Works as expexted
Works as expected .
D**!
This is a great master cylinder at a fair price when your engine warning light appears!
I have a 2006 GMC Sierra 2500 HD SLE with the 6.0 engine. This was exactly what the doctor ordered! My engine light came on, but this part was perfect and for a very reasonable price!
O**A
Not a Delco but it will get ya by
Seems to be working ok
A**R
Great quality
2006 GMC Sierra Duramax. I installed it alongside all new brake lines and hoses, brakes work great and didn’t brake the bank😝. No leaks holds pressure good!
M**C
Installed on a 2003 3500 Silverado
Perfect solution for jumpy brake pedal. Dirty master cylinder and hydro boost don't work well together. I replaced my master cylinder with this unit and my brakes are back to buttery smooth with apply and release.
F**A
OEM part and works great! Don’t waste your time buying knockoffs!
G**A
buen producto funciono muy bien en mi silverado
W**M
good quality
D**R
Did the job
C**N
Les freins fonctionne parfaitement maintenant
Trustpilot
1 month ago
1 week ago