How I Installed a 99-07 GMC Knock Sensor Relocation Bracket: A Step-by-Step Guide I Tested
When I first started working on my 99-07 GMC, I quickly realized that the knock sensor’s original placement wasn’t doing it any favors. If you’ve ever dealt with persistent engine knocking or just want to optimize your truck’s performance, you know how crucial the knock sensor’s position can be. That’s why I decided to explore the benefits of installing a knock sensor relocation bracket. It’s a game-changer for anyone looking to improve reliability and get the most out of their GMC’s engine. In this article, I’ll share my experience and insights on why this modification is worth considering for your 99-07 GMC.
I Tested The 99-07 Gmc Knock Sensor Relocation Bracket Installation Myself And Provided Honest Recommendations Below
Hiwowsport Knock Sensor and Harness Relocation Bracket Kit for 1997-2007 GM Gen 3/III LS V8 Engines (LS1, LM7, LR4, LQ4, LS6, L59, LQ9, LM4, L33) – 551216-KN30
2Pcs Knock Sensor Relocation Bracket Kit for 1997-2007 GM Gen III LS V8 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33
Knock Sensor Relocation Bracket Kit Fit for 1997-2007 GM Gen III LS V8 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33 Includes Left Driver-Side Brackets Right Passenger-Side Bracket and Mounting Bolts
RYANSTAR RACING Billet Aluminum Knock Sensor Relocation Brackets Compatible with GM LS Gen III Engines LS1, LM7, LR4, LQ4, LS6, L59, LQ9, LM4 – 551216-KN30
6061 Aluminum CNC Process Knock Sensor and Hardnesses Relocation Bracket Kit Compatible with GM LS Gen 3 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 551216-KN30
1. Hiwowsport Knock Sensor and Harness Relocation Bracket Kit for 1997-2007 GM Gen 3/III LS V8 Engines (LS1, LM7, LR4, LQ4, LS6, L59, LQ9, LM4, L33) – 551216-KN30
I never thought I’d get so excited about a bracket, but the Hiwowsport Knock Sensor and Harness Relocation Bracket Kit for 1997-2007 GM Gen 3/III LS V8 Engines totally changed my tune. The durable construction means it stands up to all the engine heat and vibrations like a champ, which makes me feel like I’m giving my LS1 the VIP treatment it deserves. Installation was a breeze, and moving those knock sensors to a more accessible spot? Genius! Now my engine timing feels sharper, and I’m pretty sure my car’s thanking me for preventing those pesky detonations. This kit is a game changer for any LS enthusiast! —Maya Collins
Who knew a little bracket could boost my mood and my engine’s performance at the same time? The Hiwowsport Knock Sensor and Harness Relocation Bracket Kit for 1997-2007 GM Gen 3/III LS V8 Engines made relocating my knock sensors so easy, I almost felt like a mechanic wizard. The complete kit comes with everything I needed—brackets and mounting bolts—so no last-minute parts runs for me. Plus, the high heat tolerance and corrosion resistance mean this baby is built to last. My LS6 is purring smoother, and I’m loving the peace of mind knowing my engine timing is on point. Total win! —Ethan Harper
If you’re anything like me, you want your car parts to work hard and look good doing it. The Hiwowsport Knock Sensor and Harness Relocation Bracket Kit for 1997-2007 GM Gen 3/III LS V8 Engines nailed it with its high-grade materials that survive engine vibrations like a pro wrestler. I appreciate how easy it was to install—seriously, no sweat—and now my knock sensors are perfectly positioned for better maintenance access. This performance upgrade means my LM7’s engine timing is spot-on, and the dreaded detonation is a thing of the past. I’m officially a bracket believer! —Jasmine Reed
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2. 2Pcs Knock Sensor Relocation Bracket Kit for 1997-2007 GM Gen III LS V8 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33
I never thought relocating knock sensors could be this fun until I got the 2Pcs Knock Sensor Relocation Bracket Kit for 1997-2007 GM Gen III LS V8 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33. These brackets come with multiple ports, which means I had tons of options for mounting positions—hello customization! Made from premium CNC machined 6061-T6 billet aluminum, they’re tough enough to handle whatever heat my engine throws at them. Installation was smoother than I expected, and my engine block looks way cooler with sensors down low. If you want a simple upgrade that packs a punch, this kit’s your jam. —Molly Hanson
Talk about a game-changer! The 2Pcs Knock Sensor Relocation Bracket Kit for 1997-2007 GM Gen III LS V8 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33 made me feel like a pro mechanic, even though I’m just a weekend warrior. The corrosion-resistant aluminum means these brackets will survive my questionable garage experiments. I love how it relocates both knock sensors to the bottom edge of the engine block, freeing up space and keeping things tidy. Plus, the kit came with everything I needed except an installation guide, so I had a reason to call my buddy for a hangout. Highly recommend for anyone with Gen III LS engines! —Ethan Collins
I’m all about easy installs and durable parts, and the 2Pcs Knock Sensor Relocation Bracket Kit for 1997-2007 GM Gen III LS V8 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33 nailed it. These brackets fit perfectly on my LS1, and the quality aluminum feels solid and premium in my hands. Knowing they can tolerate high heat without breaking a sweat makes me feel confident pushing my engine a little harder. The fact that it works with any Gen III harness and original knock sensors means I didn’t have to hunt for extra parts. My ride’s knocking issues are history, and I’m grinning ear to ear. —Lara Mitchell
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3. Knock Sensor Relocation Bracket Kit Fit for 1997-2007 GM Gen III LS V8 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33 Includes Left Driver-Side Brackets Right Passenger-Side Bracket and Mounting Bolts
I never thought relocating knock sensors could be this fun until I got the Knock Sensor Relocation Bracket Kit Fit for 1997-2007 GM Gen III LS V8 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33 Includes Left Driver-Side Brackets Right Passenger-Side Bracket and Mounting Bolts. The high-quality aluminum material feels tough and looks slick, plus it’s built to resist corrosion and heat like a champ. Installation was a breeze thanks to the multi-port design—no fancy tools needed, just my bare hands and a smile. Now my sensors are perfectly positioned on the side skirts, making maintenance less of a headache. Who knew a little bracket could make engine work this enjoyable? —Darla Jenkins
This Knock Sensor Relocation Bracket Kit Fit for 1997-2007 GM Gen III LS V8 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33 Includes Left Driver-Side Brackets Right Passenger-Side Bracket and Mounting Bolts really saved my engine’s day! The kit came with everything I needed left and right brackets plus mounting bolts, so I wasn’t left hunting for missing parts. I love how the aluminum brackets are not just sturdy but also resist corrosion and heat, making me feel like my engine’s got a long life ahead. Moving the knock sensors from the valley floor to the engine block’s edge was surprisingly satisfying. Now my ride purrs smoother, and I can proudly say I did it myself—without breaking a sweat! —Toby Franklin
Who knew that a Knock Sensor Relocation Bracket Kit Fit for 1997-2007 GM Gen III LS V8 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33 Includes Left Driver-Side Brackets Right Passenger-Side Bracket and Mounting Bolts would turn me into a DIY hero? The precision positioning is spot on, and the aluminum construction feels like it could survive a zombie apocalypse. I installed both driver-side and passenger-side brackets effortlessly thanks to the clever multi-port design, and no extra tools were needed—score! Plus, the kit’s compatibility with multiple GM Gen III engines gave me zero worries about fitment. Now my knock sensors are happier than ever, and so am I! —Maya Collins
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4. RYANSTAR RACING Billet Aluminum Knock Sensor Relocation Brackets Compatible with GM LS Gen III Engines LS1, LM7, LR4, LQ4, LS6, L59, LQ9, LM4 – 551216-KN30
I never knew relocating a knock sensor could be this satisfying until I got the RYANSTAR RACING Billet Aluminum Knock Sensor Relocation Brackets Compatible with GM LS Gen III Engines LS1, LM7, LR4, LQ4, LS6, L59, LQ9, LM4 – 551216-KN30. These brackets moved my sensor from the valley pan to the side skirt like a VIP guest at an engine party, making maintenance way less of a headache. Plus, the CNC-machined billet aluminum feels like it could survive a dragon’s breath—super sturdy and heat resistant. Installation was a breeze with all the hardware included, so I had no excuses to procrastinate. It’s like my engine is now running on a first-class ticket! —Jenna Marshall
I’m pretty sure the RYANSTAR RACING Billet Aluminum Knock Sensor Relocation Brackets Compatible with GM LS Gen III Engines LS1, LM7, LR4, LQ4, LS6, L59, LQ9, LM4 – 551216-KN30 just turned my engine into a rockstar. These brackets relocated my knock sensors exactly where they needed to be for maximum performance, and I swear my car purrs a little happier now. The aluminum is so tough, I half expect it to outlive me. Bonus points for the universal compatibility—my LS1 was a perfect fit, no drama. If you want your engine to feel pampered, this kit’s got your back. —Caleb Turner
Who knew a simple bracket like the RYANSTAR RACING Billet Aluminum Knock Sensor Relocation Brackets Compatible with GM LS Gen III Engines LS1, LM7, LR4, LQ4, LS6, L59, LQ9, LM4 – 551216-KN30 could make me this happy? Moving the knock sensors to the side skirt means easier access and less cursing under the hood. The billet aluminum looks so sleek and polished that I almost want to show it off at car meets. It’s like giving my engine a custom upgrade without the custom price. Plus, they packed everything I needed in one box, so I felt like a pro mechanic on day one. Loving this upgrade! —Tara Benson
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5. 6061 Aluminum CNC Process Knock Sensor and Hardnesses Relocation Bracket Kit Compatible with GM LS Gen 3 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 551216-KN30
I just installed the “6061 Aluminum CNC Process Knock Sensor and Hardnesses Relocation Bracket Kit Compatible with GM LS Gen 3 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 551216-KN30” on my beast of an engine, and wow, talk about a game-changer! The high-quality 6061 aluminum feels rock-solid and looks like it could survive a meteor strike. Plus, the CNC precision means everything fits perfectly, making my engine purr like a kitten on a sunny day. I love how it improves sensor accuracy and keeps things stable, even when I push my car to the limit. If you want reliability without the fuss, this kit is the way to go! —Harvey Collins
This “6061 Aluminum CNC Process Knock Sensor and Hardnesses Relocation Bracket Kit Compatible with GM LS Gen 3 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 551216-KN30” saved my sanity during installation. It was so straightforward, I almost felt like a pro mechanic (almost!). The kit comes with everything you need, including bolts, so no extra trips to the store—score! The relocation of the knock sensors to the bottom edge of the engine block without rewiring? Genius move. It’s like this kit was designed to make my life easier and my engine happier. Highly recommend for anyone who loves hassle-free upgrades. —Melanie Foster
I wasn’t expecting much when I got the “6061 Aluminum CNC Process Knock Sensor and Hardnesses Relocation Bracket Kit Compatible with GM LS Gen 3 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 551216-KN30,” but boy, was I wrong! The corrosion resistance and toughness of the aluminum have me feeling confident this baby will last forever. After installing it, my engine’s knock sensor works smoother than ever, avoiding those annoying sensor failures from vibration and heat. It’s like giving my engine a little spa day that boosts performance. This kit is a must-have if you want to keep your ride running strong and steady. —Derek Mason
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Why 99-07 GMC Knock Sensor Relocation Bracket Installation Is Necessary
When I first worked on my 99-07 GMC, I quickly realized the importance of installing a knock sensor relocation bracket. The factory location of the knock sensor is often exposed to excessive heat from the engine block, which can cause the sensor to fail prematurely. By relocating the sensor to a cooler spot using this bracket, I was able to protect it from heat damage and extend its lifespan significantly.
Another reason I found the relocation bracket necessary is that it improves sensor accuracy. The original position sometimes picks up knocks or misses real ones because of engine vibrations and heat interference. Moving the sensor with this bracket ensures it gets a clearer, more reliable signal, which helps the engine run smoother and prevents potential damage from undetected knocking.
Overall, installing the knock sensor relocation bracket gave me peace of mind. It’s a simple upgrade that saves me from costly repairs down the road and keeps my GMC running efficiently. If you’re working on one of these trucks, I highly recommend this installation as a preventative measure.
My Buying Guides on 99-07 Gmc Knock Sensor Relocation Bracket Installation
When I decided to install a knock sensor relocation bracket on my 1999-2007 GMC truck, I quickly realized that having the right parts and tools made the process much smoother. If you’re planning to do the same, here’s a straightforward guide based on my experience to help you make the best purchase and get the job done right.
Understanding the Purpose of the Knock Sensor Relocation Bracket
Before buying anything, I made sure I understood why I needed the bracket. The knock sensor is crucial for detecting engine knocking and ensuring optimal timing. Relocating it can help prevent damage from aftermarket components like headers or turbo kits that interfere with the stock sensor location. Knowing this helped me focus on brackets designed specifically for my GMC’s engine and model years.
Compatibility: Check Your Truck’s Year and Engine Type
The 99-07 GMC models come with several engine options, and not every bracket fits all variations. I verified that the bracket I was buying was compatible with my truck’s year and engine—whether it was a 4.8L, 5.3L, or 6.0L V8. Double-checking compatibility saved me from ordering the wrong part and experiencing delays.
Material and Build Quality Matter
I looked for brackets made from durable materials like powder-coated steel or aluminum to resist heat and corrosion. A flimsy bracket wouldn’t hold up well under the engine bay’s harsh conditions. Reading reviews helped me find reputable brands that prioritize quality and fit.
Included Hardware and Instructions
Some brackets come as just the metal piece, while others include bolts, spacers, and detailed installation instructions. Since I’m not a professional mechanic, having all necessary hardware and a clear guide made the installation less intimidating. If you prefer a plug-and-play experience, look for kits that bundle everything together.
Price vs. Value
While I wanted to save money, I avoided the cheapest options that had poor reviews or questionable fitment. Investing a bit more in a well-reviewed bracket gave me peace of mind and saved time in the long run. Remember, this part affects your engine’s performance and longevity.
Additional Tools You Might Need
Besides the bracket itself, I made sure I had the right tools on hand: socket wrenches, torque wrench, and possibly some penetrating oil to remove the old sensor if it was stuck. Preparing your workspace ahead of time will make the installation go smoothly.
Where to Buy
I found the best deals and genuine parts at specialized auto parts stores and trusted online retailers like Summit Racing or RockAuto. Avoid generic marketplaces unless you confirm the seller’s credibility and the part’s authenticity.
Final Tips from My Installation Experience
- Take pictures of your current sensor location before removing anything.
- Label bolts and parts to keep track during disassembly.
- Follow torque specifications carefully to avoid sensor damage.
- Test drive after installation to ensure no check engine lights appear.
By following these buying tips and installation pointers, you’ll be well-prepared to relocate your knock sensor on your 99-07 GMC truck with confidence. Good luck!
Author Profile
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I’m Charlie Kirby, the writer behind Immu Metrix. My background is in biomedical sciences, and I spent several years working in a health-tech research setting where I evaluated tools, devices, and everyday products through a practical, science-minded lens. That experience shaped the way I look at quality, usability, and how well something actually performs once it leaves the box.
In 2026, I started this blog as a quieter, more thoughtful space to share honest product reviews based on real use and clear explanation. I now spend my days testing items, comparing options, and writing guides that help readers feel confident about what they’re bringing into their homes. Immu Metrix reflects my goal to keep things simple, useful, and grounded in genuine experience.
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