If you're knee-deep in a project, finding a solid ls 6.0 serpentine kit is usually the part that saves you from a massive headache under the hood. It's one of those components that people sometimes overlook until they realize the stock truck brackets won't clear their hood or the steering box is right in the way of the alternator. When you're dealing with an LS swap, especially the popular 6.0L iron blocks like the LQ4 or LQ9, the way you pull everything together on the front of the engine makes or breaks the "finished" look and functionality of the car.
Why the Stock Setup Usually Doesn't Cut It
Most 6.0L engines come out of Silverados, Sierras, or Savana vans. Those factory accessory drives are built for massive engine bays where space isn't a concern. They're bulky, the alternator sits way up high, and the power steering pump is usually tucked into a spot that interferes with the frame rails of a Chevelle or a C10.
That's where a dedicated ls 6.0 serpentine kit comes into play. These kits are designed to pull all those components—the alternator, power steering pump, and A/C compressor—into a much tighter package. Instead of hunting through a junkyard for specific brackets from a Camaro or a Corvette, you can just bolt on a kit that works. It simplifies the whole process and ensures that your belt alignment is perfect from the get-go.
Figuring Out Your Spacing
One of the first things you'll run into when shopping for a kit is the "spacing" talk. LS engines have three main crank pulley offsets: Corvette (tightest to the block), F-Body/GTO (middle), and Truck/VVT (furthest out).
Since the 6.0 is almost always a truck engine, it usually comes with the longest spacing. If you're trying to save money, you might want a kit that works with your existing truck balancer. However, if you're working in a really tight engine bay, you might need to swap to a Corvette-style balancer and get an ls 6.0 serpentine kit that matches that shallower depth. It's a small detail, but if you get it wrong, your belt will go flying off the moment you rev the engine.
High Mount vs. Low Mount Layouts
This is where you really have to look at your specific vehicle. If you're swapping a 6.0 into an old muscle car, you've probably noticed that the crossmember is right where the low-mount A/C compressor wants to live.
The High Mount Advantage
A high-mount ls 6.0 serpentine kit moves the A/C compressor and the alternator to the top corners of the engine. This is the "safe" bet for most swaps. It clears the frame rails and keeps everything accessible. The only downside? If you're running a car with a very low hood line, like a C3 Corvette or some imports, the alternator might poke through or hit the hood.
Mid-Mount and Low-Mount Options
Mid-mount kits are the middle ground. They tuck everything in toward the water pump. Low-mount kits look the cleanest because they hide the accessories down by the oil pan, but they're notorious for hitting steering boxes or frame rails. Before you click "buy" on a kit, take a tape measure to your engine bay. You don't want to find out during the install that your power steering pulley is trying to occupy the same space as your steering shaft.
What's Actually Inside the Kit?
Not all kits are created equal. Some are just a pile of brackets and spacers, while others are "turn-key" and include the actual mechanical components.
When you're looking at an ls 6.0 serpentine kit, check if it includes: * The Alternator: Usually a high-output unit (160+ amps) because modern swaps need juice for electric fans and fuel pumps. * The A/C Compressor: Most kits use the Sanden SD7 or SD508. They're way smaller and more efficient than the old pancake-style compressors. * The Power Steering Pump: Look for kits that use a Type II pump. They're compact and easy to find parts for. * The Tensioner: Don't settle for a kit that requires you to manually tension the belt with a turnbuckle if you can avoid it. A spring-loaded automatic tensioner is much better for belt life and reliability.
Material and Aesthetics
Let's be honest: part of the reason we do these swaps is because we want the engine bay to look good. You've got two main choices here: steel or billet aluminum.
Steel brackets are generally cheaper and get the job done. They're usually powder-coated black and blend into the background. Billet aluminum kits, on the other hand, are the showstoppers. They're CNC-machined and can be polished, black anodized, or even clear-coated. If you're building a show truck or a clean street rod, a billet ls 6.0 serpentine kit adds that "wow" factor that stock plastic and cast iron parts just can't match.
Installation Tips for a Stress-Free Weekend
Installing one of these kits isn't exactly rocket science, but there are a few ways it can go sideways. First off, make sure your block's mounting holes are clean. These engines spend years in trucks getting covered in road grime and salt. Running a tap through the mounting holes on the head and block will save you from stripping a bolt halfway through the install.
Another big one is the water pump. Depending on which ls 6.0 serpentine kit you choose, you might need a specific water pump. Some kits are designed for the truck pump with the top-exit outlet, while others require the LS1-style pump with the front-exit outlet. If the kit doesn't come with a pump, double-check the requirements so you don't have to make an emergency trip to the auto parts store.
Don't forget the steam port! Many LS engines have a steam vent line that needs to be plumbed into the cooling system. Some high-end serpentine kits actually include a spot to tie this in, or they provide enough clearance so you can run the line easily.
The Budget Reality
You can spend $400 on a basic bracket kit or $2,500 on a full-blown polished masterpiece. If you're on a budget, look for an ls 6.0 serpentine kit that lets you reuse your factory alternator and power steering pump. It saves a lot of cash upfront.
However, if you've got the extra room in the budget, the "complete" kits are worth it just for the peace of mind. You get all new parts, everything is guaranteed to line up, and you only have to deal with one manufacturer if a part fails. There's nothing worse than trying to figure out which belt size you need when you've mixed and matched parts from four different vendors.
Final Thoughts on the Swap
At the end of the day, the ls 6.0 serpentine kit you pick is the finishing touch on your engine. It's what turns a junkyard engine into a custom powerplant. Whether you're going for a rugged, utilitarian look in an off-roader or a sleek, polished look in a classic cruiser, getting the accessory drive right is essential.
Take your time measuring your clearances, decide if you really need A/C (hint: you probably do), and pick a kit that matches your skill level and budget. Once it's all bolted on and the belt is tight, you'll be glad you didn't try to hack together the old truck brackets. It's one of those upgrades that you'll appreciate every single time you pop the hood.