2001–2007 Chevy Silverado 2500 HD & 3500 Brake Lines
Brake line sizes, fittings, layout and complete replacement kits for the 2001–2007 Chevrolet Silverado 2500 HD and 3500 and GMC Sierra 2500 HD and 3500 (GMT800, including 2007 Classic). Every spec on this page comes from the line-by-line contents of our RightQuick kits.
Find your RightQuick kit
Match model year, model, cab and bed or wheelbase. Every kit also fits the matching GMC Sierra.
| Years | Model | Cab | Bed / wheelbase | Notes | Kit | Lines in kit | |
|---|---|---|---|---|---|---|---|
| 2001–2002 | 2500 HD | Extended | 78" (6.5 ft) | w/o Quadrasteer | LTRQ171 | MC→ABS: 2× LTRQ095 (79") LF: LTRQ093 (73") RF: LTRQ108 (127") Rear main: LTRQ104 (113") LR: LTRQ001 (30") RR: LTRQ002 (41") |
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| 2001–2002 | 2500 HD | Crew | 78" (6.5 ft) | w/o Quadrasteer | LTRQ172 | MC→ABS: 2× LTRQ095 (79") LF: LTRQ093 (73") RF: LTRQ108 (127") Rear main: LTRQ106 (122") LR: LTRQ001 (30") RR: LTRQ002 (41") |
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| 2001–2002 | 2500 HD / 3500 | Standard | 96" (8 ft) | Single rear wheel · RWD & 4WD | LTRQ173 | MC→ABS: 2× LTRQ095 (79") LF: LTRQ093 (73") RF: LTRQ108 (127") Rear main: LTRQ103 (100") LR: LTRQ001 (30") RR: LTRQ002 (41") |
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| 2003–2007 | 2500 HD | Extended | Short bed | LTRQ178 | MC→ABS: 2× LTRQ095 (79") LF: LTRQ093 (73") RF: LTRQ108 (127") Rear main: LTRQ104 (113") LR: LTRQ001 (30") RR: LTRQ002 (41") |
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| 2003–2007 | 2500 HD | Crew | Short bed | LTRQ235 | MC→ABS: 2× LTRQ095 (79") LF: LTRQ093 (73") RF: LTRQ108 (127") Rear main: LTRQ106 (122") LR: LTRQ001 (30") RR: LTRQ002 (41") |
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| 2003–2007 | 2500 HD / 3500 | Standard | Long bed | RWD & 4WD | LTRQ179 | MC→ABS: 2× LTRQ095 (79") LF: LTRQ093 (73") RF: LTRQ108 (127") Rear main: LTRQ103 (100") LR: LTRQ001 (30") RR: LTRQ002 (41") |
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| 2001–2002 | 3500 | Standard (cab & chassis) | 137" wheelbase | Dual rear wheels | LTRQ189 | MC→ABS: 2× LTRQ095 (79") LF: LTRQ093 (73") RF: LTRQ108 (127") Rear main: LTRQ104 (113") LR: LTRQ001 (30") RR: LTRQ002 (41") |
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| 2001–2002 | 3500 | Standard (cab & chassis) | 161.5" wheelbase | Dual rear wheels | LTRQ191 | MC→ABS: 2× LTRQ095 (79") LF: LTRQ093 (73") RF: LTRQ108 (127") Rear main: LTRQ114 (141") LR: LTRQ001 (30") RR: LTRQ002 (41") |
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| 2001–2002 | 3500 | Extended (cab & chassis) | — | Dual rear wheels | LTRQ190 | MC→ABS: 2× LTRQ095 (79") LF: LTRQ093 (73") RF: LTRQ108 (127") Rear main: LTRQ112 (135") LR: LTRQ001 (30") RR: LTRQ002 (41") |
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| 2003–2007 | 3500 | Standard (cab & chassis) | 137" wheelbase | Dual rear wheels | LTRQ193 | MC→ABS: 2× LTRQ095 (79") LF: LTRQ093 (73") RF: LTRQ108 (127") Rear main: LTRQ104 (113") LR: LTRQ001 (30") RR: LTRQ002 (41") |
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| 2003–2007 | 3500 | Standard (cab & chassis) | 161.5" wheelbase | Dual rear wheels | LTRQ192 | MC→ABS: 2× LTRQ095 (79") LF: LTRQ093 (73") RF: LTRQ108 (127") Rear main: LTRQ114 (141") LR: LTRQ001 (30") RR: LTRQ002 (41") |
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| 2003–2007 | 3500 | Extended & Standard pickup | 96" bed | Dual rear wheels | LTRQ194 | MC→ABS: 2× LTRQ095 (79") LF: LTRQ093 (73") RF: LTRQ108 (127") Rear main: LTRQ112 (135") LR: LTRQ001 (30") RR: LTRQ002 (41") |
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Brake line layout
Each kit replaces every hard line on the vehicle: the master cylinder lines, one line to each front wheel hose, the long rear main line down the frame, and two short lines across the rear axle.
Typical layout from RightQuick kit contents.
What changes between builds
- Rear main line length follows wheelbase: 100" to 141" in these kits.
- Master cylinder lines are the same in every kit: two 79" 1/4" lines (LTRQ095) straight to the ABS module.
- Front lines are the same in every kit: a 73" left (LTRQ093) and a 127" right (LTRQ108).
- Rear axle lines are the same in every kit: a 30" left (LTRQ001) and a 41" right (LTRQ002).
Every line, by part number
Tube size, length and end fittings for every line used in these kits. Most lines are also sold individually if you only need to replace one run.
| Part | Tube | Length | End fittings (inverted flare) | Used for |
|---|---|---|---|---|
| LTRQ001 | 3/16" | 30" | 3/8-24 / 3/8-24 | LR |
| LTRQ002 | 3/16" | 41" | 3/8-24 / 3/8-24 | RR |
| LTRQ093 | 1/4" | 73" | 7/16-24 / 1/2-20 | LF |
| LTRQ095 | 1/4" | 79" | 1/2-20 / 1/2-20 | MC→ABS |
| LTRQ103 | 1/4" | 100" | 7/16-24 / 1/2-20 | Rear main |
| LTRQ104 | 1/4" | 113" | 7/16-24 / 1/2-20 | Rear main |
| LTRQ106 | 1/4" | 122" | 7/16-24 / 1/2-20 | Rear main |
| LTRQ108 | 1/4" | 127" | 7/16-24 / 1/2-20 | RF |
| LTRQ112 | 1/4" | 135" | 7/16-24 / 1/2-20 | Rear main |
| LTRQ114 | 1/4" | 141" | 7/16-24 / 1/2-20 | Rear main |
Why these lines rust out
NHTSA investigated brake-line corrosion on 1999–2007 GM full-size pickups and SUVs, roughly 5 million vehicles, after 3,645 complaints. When it closed the investigation in 2015, NHTSA concluded the corrosion came from years of road-salt exposure rather than a manufacturing defect, and advised owners in 20 cold-weather states and Washington, D.C. to inspect their brake lines and replace any that are corroded.
Replacing rusted steel with copper-nickel means you're not doing the job again in a few winters.
Source: NHTSA investigation EA11-001 closing report; CBS News, April 2015.
What you'll need
- The RightQuick kit for your vehicle (lines arrive pre-cut, pre-flared and numbered)
- Flare-nut (line) wrenches to avoid rounding the old fittings
- Penetrating oil for seized nuts
- DOT 3 brake fluid (check your master cylinder cap for the spec)
- Brake bleeding equipment and a helper
- SAE and metric fitting gauges, if you want to confirm a thread before ordering
Installation overview
- Lay out the kit and match each numbered line to the diagram before removing anything.
- Replace one line at a time so you always have the old line as a routing reference.
- Form each new line by hand along the factory path and seat it in the original clips.
- Start every nut by hand to avoid cross-threading, then tighten with a flare-nut wrench.
- Bleed the full system, check every joint for leaks under pedal pressure, and road-test at low speed before normal driving.
This is an overview, not a substitute for the factory service procedure.
Frequently asked questions
What size brake lines does a 2001–2007 Silverado 2500 HD or 3500 use?
Two sizes. In our RightQuick kits for these trucks, the master cylinder lines, both front lines and the long rear main line are 1/4" tubing. The two short lines across the rear axle are 3/16" tubing.
What brake line fittings does a 2001–2007 Silverado 2500 HD or 3500 use?
The kit lines use SAE inverted-flare tube nuts in these thread sizes: 1/2-20, 7/16-24, 3/8-24. The tables on this page list the exact fittings on every line.
What flare type do 2001–2007 Silverado 2500 HD or 3500 brake lines use?
Inverted (SAE double) flares on every RightQuick line for these vehicles. Never use a single flare on a hydraulic brake line.
Do I need a flaring tool to install a RightQuick kit?
No. RightQuick lines arrive pre-cut, pre-flared and fitted with nuts, numbered to match the install diagram. You form each line along the factory path and tighten it. If you have to cut a line, it must be re-flared with a proper double-flare tool before use.
Will this kit fit my GMC Sierra 2500 HD or 3500?
Yes, if the year and configuration match. Every kit on this page is listed for the GMC Sierra 2500 HD or 3500 as well. Check the kit's fitment line before ordering, or send us your VIN.
Why do brake lines rust out on these vehicles?
Road salt. NHTSA investigated brake-line corrosion on 1999–2007 GM full-size pickups and SUVs after 3,645 complaints, and in 2015 concluded it was caused by long-term salt exposure, not a manufacturing defect. It advised owners in cold-weather states to inspect their brake lines and replace corroded ones.
Why copper-nickel instead of steel?
Copper-nickel resists road-salt corrosion far better than plain or coated steel, and it bends by hand, which makes routing a full vehicle's worth of line much easier. Every RightQuick line is CuNi 90/10 copper-nickel and is covered by the 4Lifetime Limited Lifetime Warranty.