How do I know if this master cylinder fits my truck?

Check your RPO codes. It fits hydraulic-booster trucks with code JH1 and does not fit trucks with code JL4 active brake control. Vacuum-booster models are not covered.

Does it come with the reservoir and cap?

Yes. The reservoir and cap are included, so it is a complete bolt-on assembly.

Do I need to bench bleed it before installing?

Yes. Bench bleeding before installation is required to get a firm pedal and avoid trapped air.

Is this better than a remanufactured master cylinder?

It is new rather than rebuilt, so there is no core charge or worn bore. A remanufactured AC Delco unit has a longer track record, though.

What is the bore size?

The bore is 34 mm, matching the original unit on the listed GM applications.

Does it fit hybrid Silverado and Sierra models?

Yes, the 2005–2007 hybrid Silverado 1500 and Sierra 1500 are listed, along with the 2007 Classic hybrid models.

Where can I buy the A-Premium Brake Master Cylinder with Reservoir and Cap?

3 stores we checked sell it, including Walmart, CarParts.com, Amazon.

A-Premium Brake Master Cylinder with Reservoir and Cap

Q: Where is the A-Premium Brake Master Cylinder with Reservoir and Cap cheapest?

At Amazon, for $42.99, 46% under what the other stores charge, as of our latest check.

Best price now

$42.99at AmazonChecked Nov 8

46% under what the other stores charge

Compared across 3 stores. Prices are checked against each store and labelled with when. As an Amazon Associate, Deal.ai earns from qualifying purchases.

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What reviewers say

Owner feedback on this A-Premium master cylinder is limited and mixed. Buyers who matched their RPO codes report a straight bolt-on fit and firm pedal, while others were caught out by fitment and had to return it.

What people mention

FitmentMixedOwners say it fits perfectly when the RPO code matches but is wrong for trucks with active brake control or vacuum boosters.
Pedal feelPraisedBuyers report a firm, normal pedal after proper bleeding.
BleedingCriticisedSome owners say the unit needs careful bench bleeding before it works right.
BuildMixedThe aluminum body looks close to OEM, but long-term durability is unproven.
CompletenessPraisedThe included reservoir and cap save buyers from sourcing separate parts.

About the A-Premium Brake Master Cylinder with Reservoir and Cap

A-premium Brake Master Cylinders are an ideal choice to replace your broken Brake Master Cylinders. All Brake Master Cylinders meet or exceed OEM specifications. Due to high manufacturing standard, it will come with one year quality guarantee. Compatible with Chevrolet Silverado 1500 Classic 2007 Hybrid Model Compatible with GMC Sierra 1500 Classic 2007 Hybrid Model It fits the model with RPO Code JH1 (6,400 Lb. GVW, Power Brakes, Hydraulically Boosted, 4 Wheel Disc) Compatible with Cadillac Escalade 2004-2006, Escalade ESV/Escalade EXT 2005-2006 Compatible with Chevrolet Avalanche 1500 2005-2006, Tahoe 2004-2006 Compatible with Chevrolet Suburban 1500 2004-2006 with Hydraulic Booster Compatible with GMC Yukon XL 1500 2004-2006 with Hydraulic Booster, Yukon 2004-2006 It fits the model Without RPO Code JL4 (Active Brake Control) Compatible with Chevrolet Avalanche 1500 2004 with Hydraulic Booster, Silverado 1500 HD 2005-2006 Hydraulic Brake System Compatible with Chevrolet Express 2500 2003-2006 7,300lb GVW, Silverado 1500 2005-2006 Hybrid Model, Express 1500 2003-2007 Compatible with Chevrolet Silverado 1500 2006 Base; LS; LT; SS; WT; with Hydraulic Booster Compatible with GMC Savana 2500 2003-2006 7,300lb GVW, Sierra 1500 2005-2006 Hybrid Model Compatible with GMC Sierra 1500 2006 Denali; SL; SLE; SLT; WT; with Hydraulic Booster, Savana 1500 2003-2007 Compatible with GMC Sierra 1500 HD 2005-2006 Hydraulic Brake System Specifications: Bore Diameter: 34 mm Material: Aluminum Number of Outlets: 2 Rearward Outlet Size: 1/2-20 Inch Secondary Outlet Thread Diameter: 1/2-20 Inch Reservoir Included: Yes Sensor Included: Yes OEM Number: M630281, 133100, 18047519, 19209236 Quantity Sold: One Piece Note: It comes with Reservoir and Sensor