How to Add Cup Holders to a Squarebody

That first hard brake or off-camber turn tells the whole story. Your drink hits the bench seat, the floor, or your passenger, and suddenly a truck you love feels older than it should. If you're figuring out how to add cup holders to a Squarebody, the real goal isn't just finding a place to stick a drink. It's adding something that actually fits the cab, works with how you use the truck, and doesn't look like a cheap universal afterthought.

Squarebody interiors were built in a different era. They gave you a lot of metal, a lot of character, and almost no thought for modern convenience. That's fine until you start daily driving the truck, taking longer highway runs, or bouncing down a trail with a coffee or water bottle in the cab. Then cup holders stop being a luxury and start being one of those upgrades that solve a real problem every time you turn the key.

If you want the short version of what to look for before you buy, that's covered in our guide on Squarebody cup holder upgrades that actually fit. This article is about the install side — the how and the where.

How to Add Cup Holders the Right Way

The best way to add cup holders depends on your cab layout, your seat setup, and how clean you want the finished install to look. There's no single right answer for every 1973–1991 Chevy or GMC truck. A regular cab with a bench seat needs a different approach than a K5 Blazer with a console, and a trail rig used hard has different needs than a restored cruiser.

Most Squarebody owners end up choosing one of three routes:

• Floor or transmission hump mounted holders
• Console or console-lift integrated holders
• Under-dash or seat-adjacent solutions

The universal clamp-on stuff from random parts stores usually looks out of place fast, rattles loose, and rarely holds larger bottles well. If you want the upgrade to feel like it belongs in the truck, platform-specific parts win. That's why Blazin' Biddles Offroad built the Adjustable Cup Holder Assembly for 1981–1991 K5 Blazers, GMC Jimmys, and Suburbans. It was designed around the factory console itself, not as another universal workaround.

A Straight Answer on Fitment and Trimming

Here's the honest part a lot of product pages skip. The Adjustable Cup Holder Assembly clips into the console the same way the factory holder does — so the mounting is straightforward. But because these holders are sized to securely hold much larger modern cups and bottles than the stock square holders ever could, the install does require trimming the factory console opening to fit.

That trimming is intentional and part of the design. It's what lets the adjustable holders fit correctly and hold a much wider range of drink sizes than any factory-style insert. It's not floor cutting or fabrication — the holder still clips in like stock — it's just opening up the console to fit a bigger, more usable holder. For most owners, that trade-off is worth it because it solves the problem properly instead of making a small improvement that still doesn't hold your drink.

Start With Your Interior Layout

Before you cut or drill anything, look at how your truck is set up now. The biggest thing to figure out is whether you've got a bench seat or bucket seats. That changes everything.

With a bench seat truck, the center area is tight. Put a cup holder too far back and it can interfere with seat movement. Too far forward and it can crowd the shifter, your knees, or the transfer case lever. In these trucks, a console lift or compact floor-mounted holder often makes the most sense because it uses dead space without making the cab feel smaller.

With bucket seats, you usually get more flexibility. A full center console setup can look more natural and give you better storage along with cup holders.

Think about what you actually carry, too. A can of soda is easy. A tall insulated bottle is not. Plenty of cheap cup holders technically hold a drink — just not one you trust when the truck is bouncing around. That's where adjustable holders start making sense.

The Best Mounting Locations

The transmission hump and front floor area are common for a reason. They keep the drink close to the driver and passenger and usually work well in trucks without much factory storage.

A console-mounted setup is usually the most integrated option. If you already run a console lift or center console extension, adding cup holders there makes the whole interior work better without looking patched together. This route is especially good if you want a more finished look and care about comfort on longer drives.

Under-dash holders can work, but they're more of a compromise. Door-mounted options are usually the least ideal — doors get slammed, and that matters over time.

What Makes a Good Cup Holder in a Squarebody

A good cup holder does three things: it stays put, it clears the rest of the cab, and it holds real drinks — not tiny cups from 1984.

Material matters. Thin plastic can flex, crack, or rattle, especially in trucks with stiffer suspension, larger tires, or trail use. Fitment matters too. A part that's only close on fit can still hit a seat corner, block a belt latch, or land right where your hand wants the shifter. That's why platform-specific parts beat universal accessories — they solve the geometry problem, not just the storage problem. And the part should still look like it belongs there. That matters.

Installation Tips That Save Headaches

When you're ready to install, mock everything up first. Sit in the seat. Move it through its travel. Check shifter clearance. Make sure a drink can actually go in and out without hitting your elbow or the dash.

If the holder mounts to the floor, check what's underneath before drilling. Use hardware that fits the job — backing washers or reinforcement where needed can make a simple install hold up much better. And take your time on placement. One inch matters in a Squarebody interior.

For the Adjustable Cup Holder Assembly specifically, take your time on the console trimming. Mark it, double-check it against the holder, and cut conservatively — you can always remove a little more, but you can't put it back. Since it clips in like the factory holder once the opening's sized right, the mounting itself is the easy part.

When a Console Lift Is the Better Answer

Sometimes the question isn't really how to add cup holders to a Squarebody. It's whether cup holders should be part of a bigger interior fix.

A lot of these trucks need more than one upgrade at once. The stock console sits low. Storage is limited. Modern drinks don't fit anywhere useful. In that case, a console lift paired with the adjustable cup holders solves multiple issues in one shot. That's what the Squarebody Console Lift & Adjustable Cup Holder Combo was built to do. The 5-inch lift is a direct bolt-in — no floor drilling — and it gives you better armrest height and usability, while the adjustable cup holders handle the drinks. A setup that feels intentional instead of improvised.

Common Mistakes to Avoid

The biggest mistake is buying on price alone. Cheap holders fail where it counts — fit, strength, stability. Another mistake is ignoring how you use the truck. A weekend cruiser has different needs than a hunting truck or trail rig. And don't overlook passenger comfort. A holder that works for the driver but crowds the passenger gets old fast.

A good Squarebody upgrade should feel simple once installed. Not flashy. Not complicated. Just one less annoyance every time you climb in and put the truck to work.

Frequently Asked Questions