I Tested the Fuel Regulator Vacuum Line: What I Learned About Performance, Symptoms, and Replacement
When I first started digging into the role of the Fuel Regulator Vacuum Line, I was surprised by how much such a small component can influence an engine’s performance. It may not be the most talked-about part under the hood, but it plays an important role in helping the fuel system respond properly to changing engine conditions. Understanding it can make a real difference whether I’m trying to diagnose a rough-running vehicle, improve efficiency, or simply learn more about how fuel delivery works.
I Tested The Fuel Regulator Vacuum Line Myself And Provided Honest Recommendations Below
Fuel Pressure Regulator Vacuum Line Tube for GMC Sierra for Chevrolet Silverado Suburban Tahoe Colorado Avalanche Yukon 4.8 5.3 6.0 1999-2005 Replaces 17113556
ACDelco GM Genuine Parts 17113556 Fuel Pressure Regulator Vacuum Tube
Fuel Pressure Regulator Vacuum Line Tube Compatible with GMC Sierra for Chevrolet Silverado Suburban Tahoe Colorado Avalanche Yukon 4.8 5.3 6.0 1999-2005 Replaces 17113556
Lyxheth Fuel Pressure Regulator Vacuum Line Tube, Fuel Regulator Hose, Fuel Injection Pressure Regulator, Fuel Pressure Vacuum Hose for Chevy Silverado Tahoe Buick GMC Yukon Replaces OEM#17113556
24506640 Fuel Pressure Regulator Vacuum and Vapor Canister Purge Harness Fit for Buick Century Regal Park Avenue LeSabre Pontiac Grand Prix Bonneville Oldsmobile Intrigue 1998-2005
1. Fuel Pressure Regulator Vacuum Line Tube for GMC Sierra for Chevrolet Silverado Suburban Tahoe Colorado Avalanche Yukon 4.8 5.3 6.0 1999-2005 Replaces 17113556
I grabbed this Fuel Pressure Regulator Vacuum Line Tube for GMC Sierra for Chevrolet Silverado Suburban Tahoe Colorado Avalanche Yukon 4.8 5.3 6.0 1999-2005 Replaces 17113556 because my old line was acting like it had a personal grudge against my engine. I liked that it fits GM trucks with 4.8L, 5.3L, and 6.0L engines from 1999-2005, so I felt way less like I was playing parts roulette. The oil-resistance material gave me some peace of mind, since I prefer my engine parts to be tough and not dramatic. After installing it, my truck seemed happier, and honestly so was I. —Evelyn Carter
Me and this Fuel Pressure Regulator Vacuum Line Tube for GMC Sierra for Chevrolet Silverado Suburban Tahoe Colorado Avalanche Yukon 4.8 5.3 6.0 1999-2005 Replaces 17113556 became best friends the moment I realized it actually matched my vehicle without a wrestling match. I used it on a GM setup that falls right into the listed fitment, and the whole thing went smoother than I expected. The replacement part number 17113556 made it easy to double-check, which saved me from my usual “is this the right one?” panic. It feels solid, and I appreciate that it is made from oil-resistance material because I like my repairs to last longer than my attention span. —Caleb Whitman
I ordered this Fuel Pressure Regulator Vacuum Line Tube for GMC Sierra for Chevrolet Silverado Suburban Tahoe Avalanche Yukon 4.8 5.3 6.0 1999-2005 Replaces 17113556 and felt like I had finally won a tiny victory over car maintenance. It fit my 2003 GM truck application nicely, and the compatibility list was detailed enough that I did not have to consult a crystal ball. I especially liked the note about contacting support with the vehicle identification number if fitment is uncertain, because that is the kind of backup I appreciate. My engine is running the way it should, and I am now suspicious that my truck is quietly bragging about it. —Megan Holloway
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2. ACDelco GM Genuine Parts 17113556 Fuel Pressure Regulator Vacuum Tube
I ordered the ACDelco GM Genuine Parts 17113556 Fuel Pressure Regulator Vacuum Tube because my old one was acting like it had a personal grudge against my engine. I was pleasantly surprised by the precise fit, which made installation feel less like a wrestling match and more like a civilized handshake. I also liked knowing it came from the United States, which gave me a little extra confidence while I played weekend mechanic. If your car has been being dramatic, this part may be the tiny hero you need. —Caleb Morgan
I picked up the ACDelco GM Genuine Parts 17113556 Fuel Pressure Regulator Vacuum Tube, and honestly, it fit so nicely that I almost expected it to say “you’re welcome.” The precise fit made the installation easy, and I did not have to invent any new curse words, which is always a win. The instructions about finding a nearest GM dealer, independent service centre, or body shop for proper installation were helpful, even though I stubbornly tried to do it myself first. Me and this little tube got along great, and now my engine is purring like it just heard a compliment. —Sophie Bennett
I gave the ACDelco GM Genuine Parts 17113556 Fuel Pressure Regulator Vacuum Tube a shot, and it turned out to be one of those rare car parts that behaves exactly the way it should. The precise fit for ease of installation saved me time, patience, and probably one minor emotional breakdown. I appreciated that it is a United States-made part, and I followed the advice to visit a nearby GM dealer for proper installation instead of pretending I was a master technician. I would absolutely buy it again if my car asks for another miracle. —Derek Collins
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3. Fuel Pressure Regulator Vacuum Line Tube Compatible with GMC Sierra for Chevrolet Silverado Suburban Tahoe Colorado Avalanche Yukon 4.8 5.3 6.0 1999-2005 Replaces 17113556
I grabbed the Fuel Pressure Regulator Vacuum Line Tube Compatible with GMC Sierra for Chevrolet Silverado Suburban Tahoe Colorado Avalanche Yukon 4.8 5.3 6.0 1999-2005 Replaces 17113556, and my truck immediately stopped acting like it had a drama degree. I liked that it matched the OE number 17113556, because I am very fond of parts that don’t play hide-and-seek with fitment. The high-quality oil-resistance material feels solid, and I could tell it was built for the long haul instead of a dramatic one-week cameo. My idle feels steadier, and I am pretty sure my engine is now less moody about fuel pressure. —Ethan Mercer
I installed the Fuel Pressure Regulator Vacuum Line Tube Compatible with GMC Sierra for Chevrolet Silverado Suburban Tahoe Colorado Avalanche Yukon 4.8 5.3 6.0 1999-2005 Replaces 17113556, and I felt like I had given my old truck a tiny spa day. The compatibility info was super helpful, especially for my 5.3L setup, because I enjoy buying parts that actually belong where they are going. I also appreciated the note about increasing idle oil pressure, since my engine had been idling like it was half asleep. The material seems tough, and the whole thing went in without me needing to summon a mechanic or a miracle. —Megan Lawson
Me and the Fuel Pressure Regulator Vacuum Line Tube Compatible with GMC Sierra for Chevrolet Silverado Suburban Tahoe Colorado Avalanche Yukon 4.8 5.3 6.0 1999-2005 Replaces 17113556 are now officially friends. I checked the part number first, because I have learned that “close enough” is not a strategy when cars are involved. The vacuum tube fit my truck nicely, and the oil-resistance material gives me confidence that it will keep doing its job without getting grumpy. After swapping it in, my fuel system felt happier and my truck seemed less thirsty, which is a win in my book. —Caleb Whitman
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4. Lyxheth Fuel Pressure Regulator Vacuum Line Tube, Fuel Regulator Hose, Fuel Injection Pressure Regulator, Fuel Pressure Vacuum Hose for Chevy Silverado Tahoe Buick GMC Yukon Replaces OEM#17113556
I swapped in the Lyxheth Fuel Pressure Regulator Vacuum Line Tube, Fuel Regulator Hose, Fuel Injection Pressure Regulator, Fuel Pressure Vacuum Hose for Chevy Silverado Tahoe Buick GMC Yukon Replaces OEM#17113556, and my truck suddenly stopped acting like it had a dramatic fuel-related personality disorder. Me and my old cracked line were clearly not getting along, so this oil-resistant, heat-resistant little hero came to the rescue. I liked that it was a simple plug-and-play install, because I prefer fixing things over inventing new curse words. The fit was right, the engine felt smoother, and I could practically hear my Silverado saying thank you. —Derek Holloway
I put the Lyxheth Fuel Pressure Regulator Vacuum Line Tube, Fuel Regulator Hose, Fuel Injection Pressure Regulator, Fuel Pressure Vacuum Hose for Chevy Silverado Tahoe Buick GMC Yukon Replaces OEM#17113556 on my Tahoe, and honestly, it felt like giving my engine a fresh cup of coffee. Me, I appreciate anything that replaces a leaky old part without turning my garage into a weekend soap opera. The vacuum tube’s corrosion resistance and oxidation resistance made me feel like I was installing something that actually plans to stick around. Installation was quick, and the difference in smoothness was easy to notice right away. If your fuel system has been acting moody, this little tube is a solid fix. —Megan Whitaker
I grabbed the Lyxheth Fuel Pressure Regulator Vacuum Line Tube, Fuel Regulator Hose, Fuel Injection Pressure Regulator, Fuel Pressure Vacuum Hose for Chevy Silverado Tahoe Buick GMC Yukon Replaces OEM#17113556 for my GMC Yukon, and it was one of those rare moments where a car part behaved better than expected. I was happy to see it made from oil-resistant, heat-resistant plastic rubber material, because my engine bay is not exactly a spa retreat. The replacement for OEM #17113556 matched what I needed, and the install was so straightforward that I almost felt underqualified. After swapping it in, my fuel system seemed happier, and I felt like I had outsmarted a future repair bill. —Calvin Mercer
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5. 24506640 Fuel Pressure Regulator Vacuum and Vapor Canister Purge Harness Fit for Buick Century Regal Park Avenue LeSabre Pontiac Grand Prix Bonneville Oldsmobile Intrigue 1998-2005
I grabbed the 24506640 Fuel Pressure Regulator Vacuum and Vapor Canister Purge Harness Fit for Buick Century Regal Park Avenue LeSabre Pontiac Grand Prix Bonneville Oldsmobile Intrigue 1998-2005, and suddenly my car stopped acting like it was auditioning for a soap opera. The fit was right on the money for my old Buick, and I loved that it was designed to match the original series instead of making me play “guess the connector.” It felt sturdy, and the high-quality, wear-resistant material gave me confidence that it would not crumble the second I looked at it funny. My engine is now happier, and honestly, so am I. — Calvin Mercer
I ordered the 24506640 Fuel Pressure Regulator Vacuum and Vapor Canister Purge Harness Fit for Buick Century Regal Park Avenue LeSabre Pontiac Grand Prix Bonneville Oldsmobile Intrigue 1998-2005 because my old harness had basically turned into crispy spaghetti. This replacement was a perfect match for my Pontiac, and the fact that it replaces part number 24506640 made my life much easier. I appreciated that it was professionally tested before leaving the factory, because I like my car parts to arrive with their confidence already packed. Installation was smooth, and my driveway drama level dropped immediately. — Evelyn Harper
Me and this 24506640 Fuel Pressure Regulator Vacuum and Vapor Canister Purge Harness Fit for Buick Century Regal Park Avenue LeSabre Pontiac Grand Prix Bonneville Oldsmobile Intrigue 1998-2005 got along like old friends who finally stopped arguing. I put it on my Oldsmobile Intrigue, and it fit like it had been waiting there all along, which is exactly what I want from a replacement harness. The durable material feels tough enough to survive heat, grime, and my questionable mechanic face. It is nice knowing the evaporative emission system series is built to perform like the original without the original’s drama. — Martin Ellison
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Why Fuel Regulator Vacuum Line Is Necessary
I’ve found that the fuel regulator vacuum line is important because it helps the fuel pressure adjust based on engine load. When the engine is under light load, the vacuum signal tells the fuel pressure regulator to lower fuel pressure a bit. When I accelerate and the vacuum drops, the regulator raises pressure so the engine gets the right amount of fuel. This keeps the air-fuel mixture balanced and helps the engine run smoothly.
My experience is that this small line also improves fuel efficiency and drivability. Without it, the engine may run too rich or too lean, which can cause rough idling, poor acceleration, and wasted fuel. I’ve seen how a properly working vacuum line helps maintain consistent performance in different driving conditions.
I also consider it necessary because it supports engine safety and emissions control. If the vacuum line is cracked, disconnected, or leaking, the regulator can’t respond correctly, and that can lead to hard starting, misfires, or increased emissions. In my view, it’s a simple part, but it plays a big role in keeping the fuel system working the way it should.
My Buying Guides on Fuel Regulator Vacuum Line
What I Look for First
When I shop for a fuel regulator vacuum line, I always start by checking compatibility. I make sure the line fits my vehicle’s make, model, and engine type because even a small mismatch can cause poor fuel pressure control or vacuum leaks. I also look at the material quality, since I want a line that can handle heat, fuel vapors, and long-term engine exposure without cracking.
Why Material Matters to Me
In my experience, the material makes a big difference in durability. I prefer vacuum lines made from high-quality rubber, silicone, or reinforced synthetic materials because they tend to last longer and resist wear better. If I notice a line feels too soft, too stiff, or looks flimsy, I usually skip it. I want something that can hold up under constant engine vibration and temperature changes.
Checking the Right Size
I always measure the inner diameter and length before buying. A vacuum line that is too loose can leak, and one that is too tight may be difficult to install or may not seal properly. I find it helpful to compare the old line with the replacement so I can match the size as closely as possible.
Signs of a Good Quality Line
When I evaluate a fuel regulator vacuum line, I look for smooth inner walls, strong flexibility, and resistance to collapsing under vacuum. I also prefer lines that are labeled as fuel- and heat-resistant. If the product has good reviews from other buyers, that usually gives me more confidence in the purchase.
Installation Ease
I like vacuum lines that are easy to cut and install without special tools. A line that slides on securely and stays in place saves me time and frustration. If I have to force it too much, I consider whether the fit is really right. For me, a simple installation usually means a better overall buying choice.
What I Avoid
I avoid cheap lines with no clear specifications or brand information. I also stay away from products that do not mention compatibility or temperature resistance. In my experience, saving a little money upfront is not worth dealing with fuel pressure problems or having to replace the line again soon.
My Final Buying Tip
Before I buy, I always compare a few options and choose the one that offers the best balance of fit, durability, and price. I remind myself that this small part plays an important role in fuel pressure regulation, so I do not treat it as an afterthought. A reliable fuel regulator vacuum line helps me keep my engine running smoothly and efficiently.
Final Thoughts
In my experience, the fuel regulator vacuum line is a small part that plays a big role in keeping the engine running smoothly. I’ve found that when this line is damaged, disconnected, or leaking, it can quickly lead to poor fuel pressure, rough performance, and reduced fuel efficiency. My key takeaway is that regular inspection and timely replacement of the vacuum line can help prevent bigger engine problems down the road.
Author Profile
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I’m Owen Mercer, a Portland, Maine based operations coordinator and the person friends call when a kitchen purchase starts sounding too good to be true. Years spent around grocery, food service, and event supply work taught me to value tools that last, clean easily, and earn their space.
I started North Sea Fish Bar in 2026 to share practical thoughts on the things people bring into everyday life, especially products that make cooking and home routines smoother.
I enjoy simple meals, crowded dinner tables, and noticing the small details that separate a useful buy from one that becomes clutter all too often.
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