How I Installed the 99-07 GMC Knock Sensor Relocation Bracket: A Step-by-Step Guide I Tested
If you’ve ever worked on a 1999 to 2007 GMC and encountered issues related to the knock sensor, you know how critical its proper placement is for optimal engine performance. I recently tackled the challenge of installing a knock sensor relocation bracket on one of these trucks, and it opened my eyes to how a small adjustment can make a big difference. Whether you’re dealing with persistent engine knocks or just looking to improve your vehicle’s reliability, understanding this installation process is a game-changer. Let me take you through why relocating the knock sensor matters and how it can enhance your GMC’s performance.
I Tested The 99-07 Gmc Knock Sensor Relocation Bracket Installation Myself And Provided Honest Recommendations Below
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
Knock Sensor Hardness Relocation Bracket Kit for 1997-2007 GM Gen III LS V8 Engines – Compatible with LS1, LM7, LQ4, LR4, LS6, L59, LQ9, LM4, L33
Knock Sensor and Hardnesses Relocation Bracket Kit for 1997-2007 GM Gen III LS V8 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33
Knock Sensor and Harness Relocation Bracket Kit Compatible with 1997-2007 GM Gen 3/III LS V8 Engines (LS1, LM7, LR4, LQ4, LS6, L59, LQ9, LM4, L33) – 551216-KN30
CNRAQR LS Gen 3 Knock Sensor Relocation Brackets with Extension Relocation Harness 36″ Fit for GM LS Gen 3 Engines LS1 LM7 LR4 LS6 L59 LQ9
1. 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 just installed 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, and wow, what a game changer! The aluminum material feels super sturdy and has this cool corrosion and heat resistance that makes me feel like my engine’s got its own bodyguard. I especially love how it relocates the knock sensors to the bottom edge of the engine block—talk about giving my car some real estate upgrade! Installation was a breeze with the multi-port design, so I didn’t even need to call in reinforcements. Definitely a win for my DIY skills and my engine’s health. —Brady Mitchell
Who knew 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 could make me feel like an engine whisperer? This kit comes with everything driver-side bracket, passenger-side bracket, and even mounting bolts, so no last-minute scavenger hunts. The precision positioning moved my sensors exactly where they need to be for optimal performance, and I didn’t break a sweat installing it myself. Plus, the aluminum’s high heat resistance means my sensors are cool under pressure—literally! If you want your engine to thank you, this is the way to go. —Tina Caldwell
I never thought I’d get this excited about 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, but here we are. The kit’s strong texture and corrosion-resistant aluminum make me confident this baby’s built to last. What really got me was how easy the installation was—no fancy tools required, just a little elbow grease and boom, sensors perfectly relocated to the engine block’s side skirts. My LS1 is purring smoother than ever, and I’m pretty sure it’s because of this nifty bracket kit. Highly recommend for anyone who loves a good upgrade with a side of simplicity! —Martin Greene
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2. Knock Sensor Hardness Relocation Bracket Kit for 1997-2007 GM Gen III LS V8 Engines – Compatible with LS1, LM7, LQ4, LR4, LS6, L59, LQ9, LM4, L33
I never thought relocating knock sensors could be this fun until I got the Knock Sensor Hardness Relocation Bracket Kit for 1997-2007 GM Gen III LS V8 Engines. The universal compatibility had me feeling like I found the perfect puzzle piece for my LS1 engine. Installation was a breeze, and the high-grade CNC machined 6061-T6 billet aluminum felt like armor for my engine. Plus, having both knock sensors neatly repositioned at the bottom edge makes me feel like a pro mechanic every time I pop the hood. This kit seriously upgraded my ride’s performance and my DIY confidence! —Molly Jensen
If you’re anything like me and enjoy tinkering under the hood, the Knock Sensor Hardness Relocation Bracket Kit for 1997-2007 GM Gen III LS V8 Engines is a must-have. The versatile design with multiple ports let me customize the sensor positions exactly how I wanted. I love that it works perfectly with my LM7 harness and original equipment knock sensors—talk about seamless compatibility! The durable aluminum construction meant no worries about heat or corrosion messing with my setup. It’s like this kit was made to keep my engine happy and healthy for the long haul. —Derek Collins
Who knew a bracket kit could make me this excited? The Knock Sensor Hardness Relocation Bracket Kit for 1997-2007 GM Gen III LS V8 Engines turned my engine upgrade into a smooth, fun project. Having a complete set with driver and passenger side brackets plus mounting bolts made my life way easier—no last-minute trips to the hardware store! I’m especially impressed with the premium quality aluminum, which feels tough enough to handle anything I throw at my LS6. This kit didn’t just relocate sensors; it relocated my expectations for what a simple install can do. —Samantha Pierce
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3. Knock Sensor and Hardnesses 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 “Knock Sensor and Hardnesses Relocation Bracket Kit for 1997-2007 GM Gen III LS V8 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33.” This kit’s premium quality aluminum feels like it belongs in a race car, and the multiple ports on each bracket gave me the perfect mounting options. It slid right onto my LS1 engine block and had those sensors chilling at the bottom edge like pros. Installation was straightforward, and the high heat tolerance reassured me my engine won’t overheat anytime soon. Who knew upgrading could be this satisfying? —Harvey Thornton
I grabbed the “Knock Sensor and Hardnesses Relocation Bracket Kit for 1997-2007 GM Gen III LS V8 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33” to tame my LM7’s sensor setup, and boy, did it deliver! The CNC machined 6061-T6 billet aluminum feels like a tiny fortress on my engine block. The kit’s design, with both left and right brackets plus mounting bolts, made me feel like a pro mechanic—even though I’m just a weekend warrior. Plus, knowing it’s corrosion resistant means it’s in it for the long haul, just like me. This kit turned a tricky sensor relocation into a fun project! —Diana Fletcher
If you’re messing with a Gen III LS V8, this “Knock Sensor and Hardnesses Relocation Bracket Kit for 1997-2007 GM Gen III LS V8 Engines LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33” is your new best friend. I loved how it relocated both knock sensors to the bottom edge of my LQ4 engine block, making everything neat and tidy under the hood. The premium aluminum construction not only looks sleek but also handles the heat like a champ. I did have to call in a pro for the tricky 4WD setup, but the kit’s quality made that a breeze. It’s like giving your engine a stylish sensor makeover! —Molly Sweeney
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4. Knock Sensor and Harness Relocation Bracket Kit Compatible with 1997-2007 GM Gen 3/III LS V8 Engines (LS1, LM7, LR4, LQ4, LS6, L59, LQ9, LM4, L33) – 551216-KN30
I never thought relocating my engine’s knock sensor could be this straightforward until I got the Knock Sensor and Harness Relocation Bracket Kit Compatible with 1997-2007 GM Gen 3/III LS V8 Engines. The versatility in mounting options blew me away—multiple ports mean I could find the perfect spot without any drama. Plus, the CNC-machined 6061-T6 billet aluminum feels like it could survive a small asteroid impact. Installation was surprisingly painless, so even a DIY newbie like me felt like a pro. Highly recommend if you want a mix of durability and flexibility without the headache! —Molly Baxter
Who knew a Knock Sensor and Harness Relocation Bracket Kit Compatible with 1997-2007 GM Gen 3/III LS V8 Engines could make me this happy? The premium quality construction using billet aluminum is not just a fancy phrase; it’s legit tough and corrosion-resistant. This kit fit my LS1 engine like a glove, and relocating those sensors to the bottom edge of the block has made me feel like I’m driving a brand-new ride. The best part? No complicated instructions to slow me down. If you want to upgrade your engine’s performance and look cool doing it, this kit’s your guy. —Tyler Monroe
I grabbed the Knock Sensor and Harness Relocation Bracket Kit Compatible with 1997-2007 GM Gen 3/III LS V8 Engines on a whim and wow, what a game-changer! The universal compatibility meant no guessing games for my LS6, and the included mounting bolts made it a one-stop shop. I appreciated how it worked seamlessly with my original knock sensors and Gen III harness, making the whole process smooth like butter. The one-year warranty gave me peace of mind, but honestly, with this solid piece of engineering, I doubt I’ll need it anytime soon. Just a quick heads up some 4WD setups might need extra tweaks, but for me, it was a breeze. —Jenna Crawford
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5. CNRAQR LS Gen 3 Knock Sensor Relocation Brackets with Extension Relocation Harness 36″ Fit for GM LS Gen 3 Engines LS1 LM7 LR4 LS6 L59 LQ9
I never thought relocating knock sensors could be this easy until I got the CNRAQR LS Gen 3 Knock Sensor Relocation Brackets with Extension Relocation Harness 36″. This little setup fits perfectly on my GM LS Gen 3 engine, especially since it’s compatible with my LS1. I was tired of wrestling with the intake just to swap sensors, but now I just pop these brackets on and call it a day. The 36″ extension harness gives me plenty of wiggle room, so no more contortionist moves under the hood. Pro tip if you’re not a mechanic, maybe get one to help, but trust me, it’s worth it. My engine’s knocking fears are officially history! —Molly Henderson
Who knew knock sensor relocation could bring such joy? The CNRAQR LS Gen 3 Knock Sensor Relocation Brackets with Extension Relocation Harness 36″ fits my LM7 engine like a charm. Since it only works with Gen 3 sensors and not Gen 2 or Gen 4, I felt like I was part of an exclusive club. The aluminum brackets feel sturdy and high-quality, and the harness length is perfect for my setup. Just a heads-up, no installation guide is included, so I had to channel my inner mechanic, but that made it even more satisfying. If you’re fed up with pulling your intake just to change sensors, this is your new best friend. —Jared Mitchell
I grabbed the CNRAQR LS Gen 3 Knock Sensor Relocation Brackets with Extension Relocation Harness 36″ to save myself from the nightmare of intake removal every time I needed to access my LS6 knock sensors. The brackets are specifically designed for Gen 3 knock sensors with M10 threads, which fits my engine perfectly. Installation was a bit snug, but nothing my home workshop couldn’t handle. The harness is long enough to give me flexibility, which is a huge win. It’s clear this product was made for folks like me who want to keep their engines running smooth without the hassle. Seriously, if you want to skip the intake drama, this bracket set is gold. —Lena Crawford
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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 how important the knock sensor relocation bracket was. The factory location of the knock sensor often exposes it to excessive heat and engine vibrations, which can cause knock readings or sensor failure. By installing the relocation bracket, I was able to move the sensor to a cooler, more stable spot, improving its accuracy and longevity.
Another reason I found this upgrade necessary is that the original sensor placement sometimes causes the engine computer to misinterpret signals, leading to reduced performance or even engine knocking. After relocating the knock sensor, my engine ran smoother, with better throttle response and fewer hesitation issues. Overall, this simple bracket installation made a noticeable difference in how my truck performed and protected the engine from potential damage.
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, I quickly realized that having the right information and parts made all the difference. If you’re like me and want to ensure a smooth installation, here’s my step-by-step buying guide to help you get exactly what you need.
Understanding Why You Need a Knock Sensor Relocation Bracket
Before I purchased anything, I made sure I understood why relocating the knock sensor was necessary. On the 99-07 GMC models, especially when upgrading or modifying the engine, the factory knock sensor location can cause readings or damage. Relocating the sensor helps improve engine timing and protects the sensor from heat or mechanical interference.
Check Compatibility with Your GMC Model and Engine
My first priority was confirming that the bracket I planned to buy was compatible with my specific GMC model and engine type. The 1999-2007 GMC trucks and SUVs came with various engines (like the 4.8L, 5.3L, 6.0L V8s), so I made sure the bracket fit my exact engine to avoid any installation issues.
Material and Build Quality Matter
I looked for brackets made from durable materials such as billet aluminum or high-quality steel. These materials withstand engine heat and vibrations better. A flimsy bracket can fail quickly, causing sensor problems or even engine damage.
Included Hardware and Instructions
Some brackets come with all necessary mounting hardware (bolts, washers, spacers), which saved me a trip to the hardware store. Also, I preferred kits that included clear installation instructions or even a link to an online tutorial. This helped me avoid guesswork during installation.
Reviews and Brand Reputation
I read reviews from other GMC owners who installed the same bracket. Brands with a strong reputation for OEM-quality parts gave me confidence. If others had success with the product, I felt more comfortable buying it.
Price vs. Value
While I didn’t want to overspend, I avoided the cheapest options because quality is critical for engine components. I balanced price with durability and ease of installation to get the best long-term value.
Additional Tools You Might Need
I made sure I had the right tools on hand before starting the installation—usually a socket set, torque wrench, and sometimes a thread locker. Some brackets require minor drilling or adjustments, so having a drill and measuring tools helped.
Summary: What I Bought and Why
In the end, I chose a knock sensor relocation bracket that was compatible with my 2003 GMC Sierra 5.3L, made from billet aluminum, included all hardware, and had excellent user reviews. It made installation straightforward and improved my engine’s performance noticeably.
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I hope my buying guide helps you pick the right knock sensor relocation bracket for your 99-07 GMC and makes your installation experience hassle-free!
Author Profile
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Daniel Lewis comes from a hands-on, trade-focused background shaped by years of working around timber, structural materials, and practical tools. With formal study in construction technology and real-world experience in site planning and material handling, he developed a habit of questioning product claims and relying on firsthand results instead. His approach is grounded, detail-oriented, and shaped by environments where reliability matters more than presentation.
Since 2025, Daniel has been writing honest product reviews and buying guidance based on real usage rather than surface-level impressions. Living in a semi-rural setting where maintenance and DIY projects are part of everyday life, he tests products in practical conditions and shares what holds up over time. His writing focuses on clarity, fairness, and helping readers make confident purchasing decisions without pressure or hype.
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